multiple colors

Eyeboard Electrooculography (EOG) System

Eyeboard Electrooculography (EOG) System

Note: Be sure to check out the Kickstarter campaign of the Eyeboard project. This is an inexpensive yet reliable human-computer interface that detects eye movements using electrooculography (EOG), a biomedical technique based on picking up signals from electrodes placed around the eyes. EOG interfaces let users who can’t manipulate a mouse or trackpad with their […]

Continue Reading
Water Leak Detector

Water Leak Detector

The average life expectancy of a hot water heater is about 10 years, so it’s not a question of if it will leak — it’s simply a matter of when. In my part of the country, homebuilders have been installing these tanks in the attic. This saves space, but also means that if you don’t […]

Continue Reading
Wearable Light Organ

Wearable Light Organ

This simple, wearable circuit uses an operational amplifier (or “op-amp”) chip to convert sound into light. An LM324 op-amp and a transistor boost input from a mini condenser microphone to light a series of LEDs. Watch it blink to the beat of your favorite music. Check out more Weekend Projects.

Continue Reading