### DESCRIPTION

Very simplistic grid for LED's, used for my spectrum analyzer for audio. It has a controller board attached wich holds 4 daisy chained shift-registers. It's to be used with a microcontroller. There is a tiny mistake which needs attention, though it's not a fysical problem with the board itself (see below)

### TECHNICAL DETAILS / COMPONENTS

- max 3mm Led's (96x)

- A33IJ Resistor Network (12x) or similar  

- 74HC595 shift registers (4x)

### LEARN / TOPIC / BUILD INSTRUCTIONS

Just put the anode of the led through the square holes, the cathode through the round ones. 

!!! The top row of resistor networks grounds both the left and right row top 4 led's, if you want to control them seperately, make sure you seperate them (just follow the traces ^^)!!!

For controlling them using the controller board, you probably noticed that there just 32 output pins. You can use mutliple controllor boards to give each led it's own output pin (so that means for 96 leds, you need 3 controllerboards per led grid). Or you multiplex them. In my project I multiplex like so: per row, the first 8 leds have a common ground, and the last 4 have a common ground. The first 8 leds just connect to one of the output pins from the controller board, and the last 4 leds connect to the same pin as the first four leds. It's a bit tricky controlling them, but when I finish my project I will share the code.

Disclaimer, video shown here is not the final/finished product!