I, Screechy
A light-sensitive oscillator toy.
10kΩ
LED Sound Meter
In this guide you will learn to created an array of LEDs that visually represent the volume picked up by an electret microphone. You will learn how to wire 3 different circuits which are the LED array (which is really many individual circuits), the microphone, and a button which can be used to change the display mode […]
MonoBox Powered Speaker
Learn how to build inexpensive powered speakers that amplify the output of your headphone music player. It may be small, but this speaker can still rock!
Little Big Lamp
Add bright lighting to your space with powerful LEDs housed in PVC.
Using the MakerShield – Button
The MakerShield is a great prototyping shield but the button can be a little confusing to use. Since it connects to ground when pressed, it takes a little extra wiring and one change in the code to get to work with with the Arduino example sketch. Follow along!
Audio Spectrum Analyzer
As complicated as I thought this would be, this circuit is using the basic fundamentals of electronics and algebra. The only hard part is perfecting it and expanding it. Click here to see the finished project.
The Truth Meter
By Sean M. Montgomery and Ira M. Laefsky Excerpted from a Primer on Biosensing in MAKE Volume 26. When you experience an arousing stimulus, like an evocative question, a startling noise, or even a disturbing thought, your body generates a variety of psychophysical responses. One of these is micro-pulses of sweat released after a 1- […]
