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All About the Diode

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Collin Cunningham explains what diodes are all about, describing the history of the component, the various types, and even touches on creating your own. [M]aking this installment of the series taught me quite a few things. Prior to reading up on the diode, I wasn’t aware how closely its development... Read more »

Learn About LED Matrices

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Collin Cunningham’s videos remain golden! In Circuit Skills: LED Matrix he talks about LED matrices and how to control the LEDs with a multiplexing IC. He uses it to make a mini game machine! Many an experimenter, hacker, tinkerer, & maker have heeded the call of the mighty matrix –... Read more »

Seven-Segment Matrix


June’s Component of the Month is the diode, and a 7-segment display actually consists of seven light-emitting diodes! So, why not matrix them up? Skot Croshere built a matrix out of 512 7-segment displays: he calls it the DigitGrid: The DigitGrid is an array of seven-segment displays. There are 4096... Read more »

Open-Source Microscope Illuminator


Stephen Richardson of Tangent Audio built the AZIZ light ring for his Bausch & Lomb stereo microscope. AZIZ is an LED microscope illuminator that I designed and built from scratch. It is designed around a Texas Instruments TLC59116 constant-current PWM LED driver chip, and an Atmel ATTiny1634 AZIZ has 64... Read more »