An amplifier is something that amplified the voltage on a circuit. The most basic kind is an operational amplifier, and this video will show you how these work and how to use them in your electronics. As an example you'll learn how to make a microphone circuit for spying on pe ...more
This instructional video shows how to make a cheap contact microphone. These mikes pick up subtle sounds, and are so cheap that if they get smashed in a musical melee, it's no big deal. This video demonstrates the amplification of a dryer, a teapot, and a stockpot with water i ...more
Looking to go electric on the cheap? In this video tutorial, you'll learn how to make a contact microphone out of a Piezo Transducer, available for $2 from Radioshack (part #273073A). You'll also need some sort of audio connector, which can either be salvaged from old electron ...more
Use the mic to amplify your voice so it can be heard over the music.
Until Star Wars-style 3D hologram projection technology becomes commonplace, the near future of certain kinds of remote work is in robotics. Now, a new dynamic is using augmented reality to give this kind of telepresence a kind of superpower. This week, Double Robotics unveil ...more
After delaying its launch by four months, LG revealed its 2018 entry to the flagship market on Wednesday, May 2. After years of an underperforming mobile division, the LG G7 ThinQ is the first product since a shakeup within the division to get things back on track, and it brin ...more