NCEES-FE-Electrical-and-Computer tricks - NCEES - FE Electrical and Computer 2023 (Actual Questions Test Engine, NO PDF) Updated: 2024

You probably want a streaming device for your TV, whether you're a cord cutter or not. Roku is a popular choice, particularly as it ramps up its own original content.

Roku devices offer plenty of variety and portability, from the budget Roku Express to the feature-packed Roku Ultra. Whichever one you have, there's more to know beyond the basics. Here's how to get more out of your streaming device.

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1. One List to Rule Them All

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You have watchlists for all of your streaming apps, which means you have to scroll and scroll when you want to find something to watch. Instead, you can save everything to one universal list with a Roku. Use the Roku OS to search for the shows and movies you want to watch, and on the details page of each, select Add to Save List. Find the list by going to the Roku home screen and selecting What to Watch.

2. Pick Up Where You Left Off

Have you ever wanted to resume watching a movie or show where you left off, but you've forgotten which streaming service it was on? Just go to the Roku Home Screen, click What to Watch, scroll to Continue Watching, and it'll be listed there.

3. Watch Free Movies and Shows on The Roku Channel

Video-streaming services are great, but the majority aren't free. With The Roku Channel, you can sign in and access those premium channels (including Max and Netflix)—but the channel also offers free access to thousands of movies and TV episodes, if you can handle a few commercials. Roku has been adding more original content as well. Go to The Roku Channel, and scroll down to the Live TV Channel Guide for hundreds of choices. You can also watch in the Roku app, whether you have a Roku device or not: Just download it, sign in or create an account, and start streaming.

4. Search Thousands of Channels at Once

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Instead of searching every Roku channel individually to find what you want, search across them with Roku Search. Enter your search term via the Roku remote, Roku mobile app, or via voice search, and you'll see results from over 4,000 channels. Search by title, actor, or director, and you'll get a comprehensive list. Similarly, use Roku Search to compare the costs of streaming content: Type in a movie, show, or star for a list of available titles and the prices for each across channels and services.

5. Get in the Zone

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Roku Zones are collections of movies and shows from across channels that are organized by genre or topic. Go to search, type in a search term such as "comedy," and scroll through the zone that pops up. Roku added a Live TV Zone for quick access to live TV streaming services like Hulu, fuboTV, Philo, Sling, and YouTube TV, to name a few. 

6. Photos as Big as Life

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If you want to get a closer look at your photos or share them with a group, you can add Google Photos to your Roku. Go to photostreams.roku.com, sign in (you may have to verify your email), and you'll see a link to connect to Google Photos.

7. Turn Your Phone Into a Roku Remote

As great a device as the Roku is, navigating via the remote could be a better experience. To get around that, download the Roku Official Remote Control app (iOS, Android), and get the benefit of a keyboard, easy searching, and streaming from your phone or tablet.

8. Talk to Your Roku Remote

That said, you could always talk to your Roku directly with a Roku Voice Remote Pro, Voice Remote, or the Roku mobile app. On the remotes, press either the microphone icon and hold down as you speak your request. On the app, select the magnifying glass to get to the search page, then tap the microphone, let it go, speak your request, and tap the middle of the screen.

9. Ask Alexa or the Google Assistant

Connecting Roku to Amazon's Alexa (Credit: PCMag/Amazon)

If you have an Amazon Echo and a Roku, ask Alexa to control your Roku. First, you'll have to link both accounts by opening the Alexa mobile app, selecting Skills & Games, and searching for Roku. When you find it, tap Enable to Use, sign in to your Roku account, and select the Roku device you want to link (or Select All if you have more than one).

Close your Roku account, and Alexa will search for the device on the Device Discovery screen. Once it's found, tap Manage, Link Devices, and select the Roku you want to connect to Alexa. Then add the Roku to a group by selecting the Devices icon. Either add it to an existing group or create a new one by tapping the plus button. In the Alexa app, tap on the Roku device, and make sure it is enabled. Then you'll be able to use commands such as, "Alexa, open Netflix on living room Roku."

You can also use Google Assistant to make voice requests. First, check that your Roku player is running Roku OS 9.0 or higher or that your Roku TV has Roku OS 8.2 or higher. Set up your Google Assistant on your Google device or app. Open the Google Assistant mobile app, tap Explore > Settings > Home Control > Add Device > Find > Roku. Sign in to your Roku account and then choose which device you want to control with Google Assistant.

10. Find That Lost Remote

Speaker grille on the Roku Remote Pro (Credit: Will Greenwald/PCMag)

The Roku remote is easily lost in couch cushions and under coffee tables. If you've spent far too much time hunting for it, we have some solutions.

• If you have a remote with a speaker grille, open the Roku app, tap the microphone, and say, "Hey, Roku, find my remote." The remote will emit a beeping noise.

• If you have a Roku Ultra, long-press the button on the right side of the device, and the remote will emit a beep.

• If the remote you've lost is the Voice Remote Pro, say, "Hey, Roku, find my remote," and it will start beeping.

• To stop the beeping noise once you've located your remote, press any button on the remote.

To change the noise your Roku remote emits when it's lost, open the Roku app on your TV and go to Settings > Remote > Change Remote Finder Sound. To hear what it sounds like, click Preview Remote Finder Sound.

11. Make Your Roku at Home(Kit)

For iPhone and iPad owners, Roku devices support AirPlay and HomeKit, so you can send videos, photos, and music from your device to the TV and supported speakers. Set it up in the Roku menu by navigating to Settings > Apple AirPlay & HomeKit > Launch Apple AirPlay & HomeKit setup. A QR code will pop up. Scan it with your iPhone or iPad's camera and follow the instructions on your Apple device to finish setup. HomeKit, meanwhile, lets you control your Roku using Siri and the Apple Home app ("Hey Siri, play jazz on the living room TV").

12. Let Siri and Roku Chat

Your Roku and iPhone can work together, with Siri acting as the interpreter. The Roku iOS app has Siri Shortcuts that let you control your Roku with your voice. Open the app on your phone, tap the account icon at the top right, and select Siri Shortcuts. You can turn on the ability to open the Roku remote, play or pause Roku, search Roku, and turn a Roku on and off for certain models. Click on each option to keep the suggested phrasing or come up with your own commands.

13. Roku Screen Mirroring

With AirPlay enabled, you can mirror your iPhone or iPad screen via the Control Center to Roku, though most Roku devices support screen mirroring from Android and Windows devices too. To hook it up, press the Home button on your Roku remote, then go to Settings > System > Screen Mirroring. You’ll have the option to choose between Prompt or Always Allow.

14. Practice Casting

If you prefer Google's Cast technology, you can send music, videos, and photos from mobile devices to most Roku-connected devices easily as long as both are connected to the same Wi-Fi network. Open the content you want to share on the device, and look for the cast icon. Click it, and you should see all available Roku devices pop up in a menu.

15. Automatic Volume Leveling

How many times have you been lulled into somnolence by a show only to be jolted awake by a commercial? On most Roku models, you can turn on Leveling, so a commercial or a channel change doesn't result in a spike in volume. You can also choose to have soft sounds increased and loud sounds decreased with Night mode.

Turn on the feature either from Settings, if you have a Streambar or Smart Soundbar, or while streaming with other Roku devices. For Streambars and Soundbars, press the Home button on the remote and go to Settings > Audio > Volume Modes. For other devices, press the star button on the remote and navigate to Sound Settings > Volume Mode.

16. Use Roku Private Listening

Roku Voice Remote Pro (Credit: Roku)

When you want to watch something on your Roku without disturbing those around you, use Private Listening. The Roku Voice Remote Pro, Enhanced Voice Remote, and Gaming Remote include built-in headphone jacks; just plug in and keep watching. Or download the Roku mobile app, connect your headphones to your device, and tap the headphones icon.

17. Save That Screen

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Maybe you paused whatever you're watching and walked out of the room. Or you fell asleep, and now the Roku logo is bouncing around your screen like the flying toasters of yore. Give yourself something nicer to look at with Roku's screensavers. Click the Home button on your remote, then go to Settings > Theme > Screensavers.

18. Get Your Game On

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It's not a Nintendo Switch, but your Roku is still in the game. Hit the Home button, go to Streaming Channels > Games, and you can go retro with Snake or go on a sugar-fueled rampage in Candy Bear. The Roku Enhanced Gaming Remote with Voice Search supports motion-control gaming.

19. Move the Apps on Your Roku Home Screen

Roku displays channels in the order in which you add them, but you can move them around. Find the app you want to move, press the star button on your Roku remote, and select "Move channel" from the pop-up menu. Use the directional pad to move it to the desired location.

20. Say What?

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If you missed those last few lines in a show or movie, there's a quick way to catch up. Set up instant replay by going to Settings > Accessibility > Captions Mode and selecting On Replay. Then, when you hit the Instant Replay button on the remote, you'll also get the text on the screen.

21. Stream Your Own Stuff Via Plex

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Though Roku offers a ton of different channels and things to watch, you'll probably still want to access your locally stored content on your TV. Sign up for Plex Pass ($4.99 per month, $39.99 per year, $119.99 for a lifetime), and you can. Plex organizes your scattered content and lets you watch it from tablets, TVs, phones, and more; you can record and watch live broadcast TV, too.

Download the Plex app. Then install the Plex channel on your Roku, launch it, then go to plex.tv/pin. Log in and enter the code from the Roku Plex channel on the website.

22. Tap Into Live TV Streaming Services

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New live TV services are popping up regularly to meet your sports and Hallmark movie needs. To see what's on offer, click the Home button on your remote, and go to Streaming Channels > Cable Alternative to log into services including Sling and Hulu, or go to Streaming Channels > Watch With Cable to log in with a pay TV provider, such as Comcast or Spectrum. You can also go to the Roku Channel, scroll down to the Live TV Channel Guide, and flip through hundreds of channels without paying for any of them. That includes NewsOn, which streams local news broadcasts from outlets nationwide.

23. Show Your Team Spirit

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You can follow your favorite sports teams on Roku by going to the Home screen on your device, scrolling down to Sports, doing a search for an upcoming game, going to that page, and then selecting the heart icon next to your team's name. That will create a My Favorites row under Sports with all upcoming games.

24. Cloud DVRs

A number of live TV streaming services offer cloud DVR, meaning you can record live TV and access your shows later via the service's Roku app.

• If you have an antenna to watch live TV, you can record it with a device like the Tablo TV. Set it up, download the app to your Roku, and you can watch, pause, and record.

• YouTube TV subscriptions come with a cloud DVR that holds an unlimited number of hours of programming for nine months.

• Sling TV customers get 50 hours of free DVR storage. Upgrade to DVR Plus for 200 hours of storage starting at $5 per month.

• DirecTV Stream comes with a cloud DVR that holds 20 hours of content for nine months.

• Included with Hulu with Live TV is the ability to record unlimited live news, sports, shows, movies and events, which are saved for up to nine months.

• Philo subscribers can save anything that streams to the service's included DVR for a year.

• fuboTV provides subscribers with a DVR function that can be set even partway through a show's airing to capture the entire thing. How much is stored depends on your plan.

25. Be Our Guest

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Your guests can make themselves at home by accessing their Roku settings without disturbing yours. All you have to do is enable Guest Mode (previously Auto Sign Out Mode). Go to my.roku.com/account/PIN, set up a PIN, and then press the Home button on the Roku remote. Go to Settings > System > Guest Mode > Enter Guest Mode. Then enter your PIN and select OK. When guests come to stay, direct them to the Roku guide on using Guest Mode

26. Stay Up to Date

To get the most out of your Roku, you should install the latest software version. The device generally handles this on its own, but if you've recently added a channel, or your Roku has been disconnected for a while, you might have missed an update. In that case, you can update manually by going to Settings > System > System Update.

Google Maps has changed how we navigate the world. Its desktop and mobile apps have become more than just a way to get from point A to B via car, public transportation, or on foot: The ubiquitous Google service is also a geospatial search engine for the world around us.

Google continues to revamp and improve its map product, but there are a ton of customizable tools and hidden functions already baked into Google Maps that you may not know about, such as Incognito Mode. Check out our tips for how to maximize your Google Maps power.

1. We're Doing It Live

Search with Live View (Credit: Google)

You can get an AR view of the street you're on, if that street is in Amsterdam, Dublin, Florence, London, Los Angeles, New York, Paris, San Francisco, Tokyo, or Venice. Open Maps, click the camera icon at the top, and hold your phone up to scan your location. You'll get an overlay of all the places you'd see on Maps, so you can easily find restaurants, shops, and more.

Meanwhile, Immersive View for routes, which rolled out in October, gives you a bird's-eye view of your route complete with 3D imagery along the way, whether you're walking, cycling, or driving. Look for it in select cities, including Amsterdam, London, New York, and Tokyo.

2. Inside Access

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Google Maps isn't just for the great outdoors. You can navigate through malls, airports, and other big buildings by finding the location in Maps, clicking on it, then scrolling to Directory. You'll never get lost looking for a Cinnabon again. This feature is available in over 10,000 locations worldwide.

Navigating with indoor Live View (Credit: Google)

Some places even support Live View inside, where animated arrows will guide you around airports, train stations, and malls. It launched in 2021 in the US, Zurich, and Tokyo, and in early 2023, it announced plans to expand to more than 1,000 new locations in Barcelona, Berlin, Frankfurt, London, Madrid, Melbourne, Paris, Prague, São Paulo, Singapore, Sydney, and Taipei. Just lift your phone up in a supported region to jump into Live View.

3. Plot Multiple Locations on Google Maps

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Rarely do car trips consist of going from point A to B; more often, they are something like A-to-café-to-library-to-Joe's-house-to-B. Thankfully, Google makes it possible to anticipate real trips. To add multiple destinations in the Google Maps mobile app, enter your starting point and your ultimate destination, and then click the three-dot menu in the top-right corner. This prompts a pop-over menu with the option to "Add stop." Click that, and you can create a route with multiple stops. You can even drag and drop stops within your itinerary. (Note that this doesn't work when you're using the mass-transit option.)

4. Customize Your Vehicle Icon

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When you're driving, Google lets you choose what kind of car shows up on your navigation in the iOS and Android apps. In the app, plug in your destination and start up driving directions. Tap the icon that shows your current location, and a pop-up menu appears with several car-icon options: a sedan, a pickup truck, or an SUV.

5. 'Hey Google, Where Am I Going?'

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You might want to interact with Maps while you're driving, but you don't want to take your eyes off the road. With "OK Google" voice commands in the Google Maps Android app, you don't have to. For example, if you notice you're running low on gas, say "OK Google, find gas stations," and it will show gas stations on the map (which you can look at when you've come to a red light or pulled over). You can also ask questions like "What's my next turn?", "What's my ETA?", and "How's traffic ahead?" On Android, set up Google Assistant, and you're good to go. (You'll need a phone running Android Version 9.0 or higher with 4GB RAM or more.) On iOS (pictured above), tap the microphone icon at the top-right, then ask your questions via voice.

6. Access Google Maps Offline

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Today, Maps is most useful on mobile, which brings up a problem: When you're in need of Maps, you may find yourself somewhere with limited (or—gasp—nonexistent) coverage. To help, Google Maps supports offline access. Type in an address or area, swipe up on the menu at the bottom of the screen, tap the ellipsis icon on the top right, and select Download offline map. If you have enough storage on your device, the map in question will be saved. To access it later, tap your avatar > Offline maps, and you can then get information about businesses in the region and turn-by-turn directions within the downloaded section.

7. Get Your Groceries

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Google has incorporated grocery ordering and pickup functionality into Maps for select brands. Things kicked off a few years ago amid the boom in curbside pickup during the pandemic. That's still an option; in early 2023, Google touted the improvements it's made to the ETA function inside Google Maps for Kroger pickups. But grocery stores can also add a Place an order option to their Maps business profiles. In addition to Kroger stores (which also includes Fry's, Ralphs, and Marianos), it's also available for Albertson's and Fred Meyer locations.

8. Let Other People Drive

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Ride-sharing services are a big part of the modern transportation mix, so Google added ride options from companies such as Lyft (sorry, no more Uber) to its mobile app. Once you enter your destination, tap the little figure attempting to hail a taxi or the mass-transit option. You'll then be presented with nearby rideshare options, along with the estimated time of arrival and fare. Tap Open App to book your ride.

9. Find Accessible Transit Routes and Locations

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Those with mobility issues can search for wheelchair-accessible transit routes by tapping Options > Wheelchair Accessible when looking for train or bus directions. When you get to your destination, meanwhile, the Accessible Places setting offers up wheelchair-accessibility information about that location.

Turn it on via Settings > Accessibility > Accessible Places. "When Accessible Places is switched on, a wheelchair icon will indicate an accessible entrance, and you’ll be able to see if a place has accessible seating, restrooms, or parking," Google says. "If it’s confirmed that a place does not have an accessible entrance, we’ll show that information on Maps as well."

10. Change The Font Size

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If the words on Google Maps are too small to read, make them bigger.

On an iPhone, make sure you have iOS 15 or higher via Settings > General > About. Then go to Settings > Control Center. Under More Controls, you'll see Text Size. Tap the green plus icon on the left, which moves it to the top under Included Controls. Now, open Google Maps and swipe down from the upper right where you see the battery icon. Tap on the Text Size button (an icon of a small A next to a large A). On the bottom, select whether you want to increase the font size on just Google Maps or across all apps. You can then increase the font size with the white bars. Close out of Control Center and your font adjustments should update automatically.

On an Android, you can change the size of the font or display but this is going to be a universal change across all of the device's apps. Open Settings, then select Accessibility. You can make words larger by tapping Font Size and then setting your preferred letter size or change the display size by tapping Display Size and then setting your preferred icon size.

11. Remember Where You Parked

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Remember when the Seinfeld gang spent the whole half hour wandering around a parking garage looking for their parked car? That episode (along with many others) would not work in 2024, thanks to Google Maps.

At your destination, tap the blue location dot, and select Save parking, which adds a label to the Maps app identifying where you parked. On Android, tap that to add details such as the parking garage level and spot or the amount of time left before a meter expires. You can also set meter reminders, add a photo of where you parked, and send your parking location to friends.

To find it later, tap the search bar at the top, and select Parking location (Android) or Saved parking (iOS). Or tap the Driving arrow below, and look for Saved parking on iOS. Google will automatically delete the parking reminder after 8 hours, though you can manually get rid of it by tapping You parked here on the map and selecting Clear (iOS) or More info > Clear (Android).

12. What's the Parking Sitch?

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Google Maps can provide turn-by-turn directions based on live-ish traffic data, but it can also provide you with a glimpse of the parking situation. When you search for driving directions to a location on iOS or Android, you might see a P logo at the bottom of the screen along with one of three designations: limited, medium, and easy (plus On-site for retailers with large parking lots). This can help you decide how much time you'll need to allocate for parking or even whether another form of transportation would be a better option.

13. Share Your Location

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Google Maps lets you share your current location with people for specified periods of time. When you share your location with a certain contact, they'll see your icon moving in real time on their map. On mobile, tap your profile icon on the top right, and select Location sharing. Then choose with whom you want to share and for how long. (You may need to first allow notifications from Google Maps in your phone's settings menu.)

14. View (and Delete) Your Google Maps History

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Google maintains a very detailed record of your digital activities. If you'd rather it lose your Maps data, you can erase it on desktop or mobile. On a desktop, go to maps.google.com. Click the hamburger menu, and select Your data in Maps. You'll end up on a page titled Google-wide Controls, where you can go to Location History > See & delete activity. You'll see a map with a timeline of your activity. On the bottom-right of the map, click the trashcan icon to delete all your location history permanently.

As of December 2023, the first time you turn on location history, Google will default you to auto-delete your history every three months. To adjust that, navigate to myactivity.google.com. Click Location History > Choose an auto-delete option, and choose how often Google will delete your data (every 3, 18, or 36 months) or turn auto-delete off completely.

On mobile, go to Settings > Maps History, which will bring you to a Maps Activity page. Look for the Delete drop-down menu, where you can opt to delete your history from today, all time, or a custom range. Tap Auto-delete to select a timeframe for when Google will automatically delete Maps data

15. Go Incognito

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For a quick way to poke around Google Maps without leaving any obvious footprints, go Incognito. Google Maps won't save your browser or search history in your account or send notifications. Your searches and movements won't be added to location history or shared location. And Google won't use your activity while you're in Incognito Mode to personalize Maps. This mode has advantages when you want to peep a location without having it tangled up with your search history, but just as on web browsers, it doesn't make you invisible. To turn the mode on, tap your avatar and select Turn on Incognito mode; the Incognito icon appears in the search bar. Tap it and select Turn off Incognito mode to switch it off.

16. Time Travel With Google Maps

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Street View has amassed a huge collection of street imagery over the years. In 2014, Google introduced Time Travel, a way for users to see how Street View has changed over time. And in 2022, it expanded from the desktop to mobile. To look back at a particular address, enter Street View and tap anywhere on the screen. At the bottom, tap See more dates. Where available, this should produce a series of photos. Scroll through and select the date you want to see.

17. Add Some Music

If you've always got Google Maps navigation open while you're driving (or walking), you can add music to your trip without leaving the app. Sync music apps such as Spotify or Apple Music by opening the menu and navigating to Settings. On iOS, tap Navigation > Music playback controls to connect Apple Music or Spotify. On Android, tap Navigation settings > Assistant default media provider, where you can link a number of music-streaming services, including YouTube Music, Spotify, Apple Music, iHeartRadio, Pandora, and Deezer. Once you do, a pop-up to your app of choice should appear as you're driving for a quick tap to get your music started. Be sure to create your playlists beforehand so you can keep your eyes on the road!

18. Find Electric-Vehicle Charging Stations

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More and more electric vehicles (EVs) are taking to the road, and Google Maps is adapting. You can search "EV charging" or "EV charging station" in Google Maps, and it suggests the best station for you based on traffic conditions, your charge level, and the expected energy consumption. You can filter by types of plugs, and if you're in a rush, you can select Fast Charge to find the charging stations with the most voltage. If you use Android Auto in an EV, meanwhile, it will no longer show gas stations.

19. Request Fuel-Efficient Routes

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Want to make sure that next road trip is fuel-efficient? Turn on this setting in Google Maps and the app will prioritize fuel- or energy-efficiency over other factors like real-time traffic and road conditions. "So besides showing you the fastest route, it will also show you the most efficient one, even if they aren't the same," Google says.

Go to Settings > Navigation / Navigation settings and toggle Prefer fuel-efficient routes to on. Here, you can also tell Google Maps your engine type: gas, diesel, electric, or hybrid. Google will then serve up routes based on that engine type to help you save fuel.

20. Find Safe Drug-Disposal Locations

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Google Maps is doing its part to fight the opioid crisis with a search tool to help users find safe drug-disposal locations. Type "drug disposal" into the search bar to pull up pharmacies, medical centers, and local authority locations where you can safely dispose of excess pills.

21. Share Your Favorite Places

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Google Maps lets you share some of your favorite places with a friend. Just tap the share icon on the location's Google Maps card to send it to them via text, email, or your app of choice. Save favorite places by tapping the Save icon; they then show up in the Saved option in the menu bar.

If you want to share more than one favorite location, you can create a Pinterest-like list within Google Maps. When you save a favorite place, tap New List to create a collection (like "Thai restaurants in Brooklyn") or add it to an existing collection. You'll find them in the Saved tab under Your lists; tap the three-dot menu and then Share List to send a link to friends.

22. Become (or Consult) a Local Guide

Think you know your neighborhood better than Google's algorithm? Then consider becoming a Local Guide. Although anyone can leave reviews and tips in Google Maps, being a Local Guides allows you to earn points for leaving more insights and data, which—as you go up the ladder—can result in "rewards and early access to new features," Google says.

Sometimes, a little puny matchbox-sized electronic speed controller (ESC) won’t do the job. If you find yourself looking for something heftier, say, in the range of hundreds of amps, you might look towards a design like the MP2 ESC. [owhite] has built an example of the design that can deliver some serious power.

[owhite’s] build has some serious specs: it’s rated to offer up to 300 amps at up to 150 volts, though thus far, it’s only been tested at up to 100 V. Like the original MP2, which hails from the Endless Sphere forums, it’s designed to be compatible with VESC code using the STM32F405 microcontroller. It’s intended for driving high-powered traction motors in applications like e-bikes and electric scooters, as you might have guessed by its potential output power being well into the tens of kilowatts range.

If you’re eager to build your own, you can do so, with the design files on GitHub. Just note that you’ll need some hefty parts to handle the juice, including beefy MOSFETS and juicy capacitors rated at 160 V.

Open source motor controllers abound of late, and we’ve featured a few in recent times. Just remember that astute design and using parts within their means is the key to avoiding letting the smoke out! Continue reading “300 Amps Through An Open Source Speed Controller” →

An RC VTOL aircraft always makes for a compelling project, but ensuring the transition between hover and forward flight can be quite challenging. In the video after the break, [Nicholas Rehm] demystifies of the flight control algorithm required for a VTOL tailsitter.

Tailsitters are one of the simplest VTOL arrangements, the testbed here being a simple foam KF airfoil wing with two motors and two servo-controlled elevons. As with almost all his projects [Nicholas], uses of his open-source dRehmFlight flight controller to demonstrate the practical implementation of the control algorithm.

Three major factors that need to be simultaneously taken into account when transitioning a tailsitter VTOL. First off, yaw becomes roll, and vice versa. This implies that in hover mode, elevons have to move in opposite directions to control yaw; however, this same action will make it roll in forward flight. The same applies for differential thrust from motors — it controls roll in hover and yaw in forward flight. Nevertheless, this change of control scheme only works if the flight controller also alters its reference frame for “level” flight (i.e., flips forward 90°). As [Nicholas] demonstrates, failing to do so results in a quick and chaotic encounter with the ground.

With these adjustments made, the aircraft can transition to forward flight but will oscillate pitch-wise as it overcorrects while trying to maintain stable flight; this is due to PID gains – 3rd factor. The deflection required by control surfaces is much more aggressive during hover mode; thus PID gains need to be reduced during forward flight. A final improvement involves adding a brief delay when switching modes for smoother rotation.

For more interesting VTOL configurations, check out [Tom Stanton]’s RC V-22 Osprey, and this solar recharging trimotor

Since the first modern electric vehicles (EV) took to the roads in the 2000s, critics have been quick to question the ‘clean’ label attached to them. From manufacturing concerns to battery power sources as well as overall autonomy, EVs have been under scrutiny from sceptics. With the amount of debate and misinformation troubling the waters, the facts behind the efficiency of electric vehicles have become somewhat clouded - so just how clean are these vehicles?

↪ Read Also: The Electric Vehicle Revolution Is Alive In Barbados

Battery Production

An argument that is routinely put forward to contrast the clean image of electric cars is the pollution behind the manufacturing process of their batteries. There is indeed a range of rare earth metals that make up the composition of the battery, and their extraction and manipulation can contribute to carbon emissions. However, as a 2018 International Council on Clean Transportation (ICTT) report illustrates, .

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A comparative study between EVs and internal combustion engine vehicle (ICEV) in China corroborates the ICTT report, indicating that infrastructure and efficient manufacturing techniques are the keys to reducing emissions during production. Chinese EV battery manufacturers produce up to 60% more CO2 during fabrication than ICEV engine production, but could cut their emissions by up to 66% if they adopted American or European manufacturing techniques. As such, the pollution created through the extraction process and production of batteries remains on par or slightly higher than the manufacturing process of petrol or diesel-based engines.

Lifetime Difference

In its study, the ICTT also notes the stark difference in emissions between electric and internal combustion over the course of their lifetimes. With no combustion and complete lack of tailpipe emissions, EVs produce the bulk of their emissions through their manufacturing process and the sourcing of their energy, giving them an advantage over petrol and diesel-powered cars.

Whilst ICEVs have been steadily reducing their emissions since 2000, electric vehicles still have a marked edge by producing close to no running emissions. Additionally, as EVs become more common and manufacturing becomes more widespread, battery recycling will be more efficient and reduce the need to extract new materials, therefore lessening the reliance on mining and production of new batteries.

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The total impact of electric vehicles is more pronounced when looking at their complete lifetime, where combustion engine vehicles are unable to compete. .

Electricity Sources

A new study by the Center for Economic Studies (CES) in Munich proclaimed: “Germany’s current energy mix and the amount of energy used in battery production, the CO2 emissions of battery-electric vehicles are, in the best case, slightly higher than those of a diesel engine, and are otherwise much higher.”

Although it may seem like a damning indictment on electric vehicle performance, the paper was quickly debunked by industry experts, who found a long list of inaccuracies with the CES’s findings. Apart from laying out previously discredited information such as electric car batteries becoming “hazardous waste” after 150,000 km, or misrepresenting government data to fit their research, the study also painted ICEV emissions as lower than the reality.

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Dr. Markus Lienkamp, head of the Department of Automotive Engineering at the Technical University of Munich denounced the report as an “unscientific conspiracy theory”. Other pundits pointed towards previous studies that showed that an electric vehicle charged on an exclusively coal-powered grid would reach similar carbon emissions performance as an ICEV - making EVs more effective over their respective lifetimes.

The Future Of Transport

Current electrical grids are mostly moving towards reducing their reliance on fossil fuels and increasing their renewable energy production. With electrical vehicles already producing fewer emissions through their lifetime regardless of the energy source, it shows that EVs are indeed the vehicle of the future. Car manufacturers are also accepting the fact that electric cars are less polluting and producing more EVs will help reduce total carbon emissions.

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Electric vehicles as they currently stand are far less polluting than their combustion engine counterparts. As the technology becomes more mainstream, it is likely to become even more efficient and sustainable. Economies of scale will benefit EV manufacturing by providing better infrastructure, more efficient manufacturing techniques, recycling options and reduce the need for the mining of new materials. Electric vehicles are not a panacea but combined with greater deployment of renewables and the decarbonization of the electricity grid they offer a pathway to greatly reduce greenhouse gas emissions.

Size

The size of the electric stove you’re interested in should be one of the most important factors when making a purchase. You likely don’t want to rearrange your whole kitchen to fit a new stove, so it’s important to have accurate measurements of the space where the new stove will sit.

In addition to the dimensions, buyers need to consider the size of the stove in terms of how many burners and ovens it will have. Stoves can have more than four burners and one oven. Plus, buyers need to consider the size of the oven to know how much it can fit.

Style

There’s the style of stove you want, like a four-burner vs. a six-burner, a coil range or a smoothtop range, but there’s also the style your stove can bring to your kitchen. Stoves can come in a variety of colors outside of the usual black, white and stainless steel models. Stoves are nearly available in every color.

Power

As the name implies, electric ranges are powered by corded electricity, drawing around 2,000 to 5,000 watts. Electric ranges are available in six to nine-burner configurations, and each element on the range will have a different wattage, with the largest typically using the most power. The burners can be set at different heat levels for small and large pots.

The more powerful your element is, the quicker it can cook food. But don’t be fooled into thinking that power means bigger is better—these high-power elements use more electricity and require more maintenance. Lower wattage elements are better for slow cooking, warming food and bringing water to a slower boil.

If you are shopping for an electric range, you will want to ensure that your new range’s wattage is no higher than what you currently have in your home. Using a range with too much power can damage some cookware and cause damage to your home wiring.

Cooking Capability

These days, stoves come with all sorts of bells and whistles. Want an air fryer? Your stove can do that. You can also choose induction cooking ranges that will help cook food more evenly.

Be sure to take a look at the cubic foot capacity so you know how much you can fit into the oven at one time. Ovens can also have two or three racks, which could be an important factor, depending upon how much you cook in the oven.

Features

Some of the more advanced and new electric stoves have an array of settings available, so it’s best to consider what you will use your range for.

For instance, electric ranges offer unparalleled cooking flexibility with features like convection cooking, a broiler, an induction cooktop and even Wi-Fi compatibility, allowing you to operate and monitor your range remotely via an app on your phone or tablet. Not to mention, some electric stoves come equipped with self-cleaning functionality so that you can knock another chore off your to-do list.

Remember, a more expensive range with more features will cost an extra amount in repairs should they ever need it. So buying one with only the settings you need is a better option as they are less expensive and will last longer.

When it's too far to walk but too short to drive, then maybe one of the best electric scooters is the answer. Electric scooters have exploded in popularity because they're easy to use and zip you around quickly. And, because they're more compact than bikes, they're easier to store in apartments and smaller spaces.

Choosing the best electric scooter for your needs comes down to price and purpose: What are you willing to spend, and what are you using it for? We've tested dozens of scooters, ranging from less than $200 to more than $1,500 to find the best electric scooter for everyone and anyone. As part of our evaluations, we've taken them up and down hills, on subways and trains, through cities and suburbs, to see how well they perform in a variety of conditions.