Receiver Search Results

How To: Listen to Radio Conversations on Android with an RTL-SDR Dongle & OTG Adapter

Everyone from first responders to hotel cleaning staff use radios operating in the sub-megahertz range to communicate, often without even encoding the transmission. While encoding and encryption are increasingly used in radio communication, an RTL-SDR adapter and smartphone are all it takes to start listening in on radio conversations happening around you.

How To: Redial Busy Numbers Automatically on Your iPhone So You Don't Have to Keep Calling & Calling Manually

Even under normal circumstances, it's almost impossible to speak to a representative for a government agency or company in just one try. Many systems will put you on hold for long periods or ask to call you back when someone is available, but there are still some out there that just give you the busy signal over and over again. In those cases, there's a jailbreak tweak that can help.

How To: Build a Cheap Arduino Tachometer to Measure the RPMs of Spinning Fans (And More)

A tachometer, or RPM counter, is a device that measures the speed of something that's rotating. In a car with a manual transmission, the tachometer can be helpful in determining when to release the clutch and how much gas to give when you're taking off. This DIY Arduino Tachometer by Chris on PyroElectro uses an infrared transmitter and receiver break-beam pair to measure the RPM of a computer fan. When the fan blade passes between the transmitter and receiver, the IR beam counts the interrup...

How To: Speed Test Your Chromecast or Android TV

The Google Cast feature that serves as the primary interface for the Chromecast and comes bundled with Android TV devices like the Nexus Player is a marvel of modern technology. But as these things go, troubleshooting issues can be difficult with something so groundbreaking, especially when you consider that there are two parts to the equation—the casting device (your phone, tablet, or computer) and the receiver.

How To: Choose Which Microphone Your Phone Uses When Recording Video in Fimic Pro (To Capture Clearer Audio)

When shooting video on your phone, you have two cameras at your disposal, the rear camera and the selfie camera, and you can switch freely between the two. As for microphones, you may have more than one but, unlike with the cameras, it's not easy to switch between them. Filmic Pro solves this problem by isolating the mics so you can choose the best option for the audio track.

How To: Bypass Region-Blocked Streaming Content Online for Free with Tunlr

For people that live outside of the United States, how many times has this happened when surfing through U.S. streaming services? If you're outside of the U.S. market and want to stream stateside services like Hulu, MTV, CBS, Pandora, and others—you're in luck. Tunlr is an application that re-addresses certain data envelopes, tricking the receiver into thinking the data originated from within the U.S. by using its own DNS server's IP address. You can even watch some non-US shows stateside, li...

News: Fully Functional DIY Pump Action Shotgun Made Out of Paper

This is no paper gun like you've ever seen before. Seriously. Tacome1942's homemade paper shotgun is a life-sized, fully functional Remington 870 replica. It would be hard to tell it apart from the real deal, not to mention it practically sounds like an authentic shotgun, too. The shotgun is made of approximately 97% paper, the remaining 3% consisting of pins, wires, and springs. Check out all the videos below to see the finer details, including the trigger group, shell stop, and disassembly ...

News: Coming Soon to a Smartphone Near You: 3D Navigation for Buildings!

Now that everyone has an Android or iPhone in their pocket, there's no excuse for being late to an appointment or job interview. Thanks to that GPS receiver in your smartphone, navigating your way through city streets and highways is a cinch, in or outside of your vehicle. But once you get inside a building, that fancy GPS feature doesn't know what to do. Which direction is the elevator? How do you get to room 819? Where's the nearest fire exit? The bathroom?

How To: Control Your Apple TV with Just Your iPhone

So, you've lost your Apple TV remote. Maybe it's busted. What are you supposed to do now? You could go out and buy a new one, but they're expensive if you have a newer Apple TV with a Siri Remote, and wouldn't you rather spend that money on a movie? You might be without a working dedicated remote, but you likely have the next best thing already in your pocket.

How To: Build a Long Range Laser Spy System for Eavesdropping on Your Neighbors

Eavesdropping from a distance can be tricky because it usually requires some sort of bug or transmitter. It's easy to transmit audio through lasers, but you can also use lasers to build a microphone that picks up audio from a distance. LucidScience built the Laser Spy System for about $20. To make your own, you'll need a cheap laser pointer, an NPN phototransistor, a headphone amp, and a few other small pieces listed below. A light-to-sound circuit is installed in a small plastic box with the...

How To: Unlock Your Front Door Without Keys Using This DIY Keyfob Entry System

Keys are on the way out. They're clunky, take up precious space, and slow you down when you have tons of identical-looking gold ones on your keyring. Everything we can open with keys can now also be opened with wireless technology in just a click—so why use keys anymore? Sure, you can pay hundreds of dollars for an automated lock system on your house—but why do that when you can build it yourself!