Capacitors: 0.1μF

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 […]

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0 – 24 Volt, 2 Amp Bench Top Power Supply

Hobbyist electronics projects need robust, reliable power supplies for prototyping and testing. I learned how to build this circuit from the Basic Analog Circuits class at ITP taught by Eric Rosenthal, but took it several steps further in building a solid enclosure and integrating a voltage meter. Now it lives on my desk, ready to […]

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Introductory Circuit Design Process using Freeduino

Introductory Circuit Design Process using Freeduino

This project will cover the basic use of CadSoft’s Eagle freeware. We will be exporting from Eagle to the DXF file format which is readable using Adobe Illustrator. From there, we will take separate exports to show the overall sequence events involved in desiging the board. But first we start with the board layout.

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Laser Harp

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.

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The Truth Meter

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- […]

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