Red
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.
Whack-a-Mole Game
Jim Chen designed an excellent electronic “Whack-a-Mole” game using 555 timers, LEDs, and bent-diode touch sensors, that you can build on a solderless breadboard
Laser Harp
I once saw someone playing music by breaking laser beams with his hands. I thought it was fake, but discovered it was real and made my own laser harp.
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- […]
PIR Sensor Arduino Alarm
Build a motion-sensing alarm with a PIR sensor and an Arduino microcontroller.
