25 May '15, 2pm

LED Matrix Plus Geiger Counter

LED Matrix Plus Geiger Counter

A lot of projects get made because someone just has the parts lying around. In this case, [Ed Nisley] got given a nice 8×8 RGB LED matrix, and needed something to display. [Ed] details the transformation of stuff-lying-on-the-desk into a unique matrix display for a Geiger counter (which he also presumably had sitting around somewhere). The result is a lightshow that’s as random as radioactive decay, and that’s pretty darn random. The first post covers the hardware layout . It’s build on protoboard, but ends up looking a lot nicer than our projects because [Ed] spent some time hiding the shift-register ICs and row-driver transistors underneath the matrix itself, which was nicely socketed above. A sweet touch is the use of SMT resistors soldered upright underneath the board to save space. Cute. The second post covers the circuit design , and is worth a look if you’re new to ...

Full article: http://hackaday.com/2015/05/25/led-matrix-plus-geiger-cou...

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