----------------------------------------------- This is par of a (RGB) led cube 8x8x8 controler. It's a catode/anode led controller/driver that if it is ment to be used in RGB LED cude configuration, just stacks on top of each other three times in a tower. It's designed to use M3 spacers, very cheaply available on ebay. It uses 74hc495, and you can configure on witch side(of a board: left/right) will be -serial input- and -serial output- with two jumpers (U17 - U22), basicly a blob of solder should work just fine. On the output of last 74hc495 on the board, there is a one AND gate as buffer. For output stage, it uses 74VHC541 3-stage non-inverting buffers to drive LEDs via 100/220ohm resistors. All the M3 holes positions markings are labeled in project itself. The pins are(from left to right) on both sides: GND-VCC-Latch(RCLK)-Clock(SRCLK)-Data(Serial) in/out --->(nice video about 74hc495(s) from -kevin darrah-) 8 100uF tantalum with 2 100nF ceramic caps (are overkill) should provide very stable power source for LEDs and shift registers. Connectors from resistors to LEDs are 8 pin SMD 1.25mm spacing (https://www.ebay.com/itm/191800273097). **This project was inspired by** "http://www.kevindarrah.com/?cat=99" ----------------------------------------------- Parts list: - 8pcs smd 74hc495 [lcsc search](C110383) - 8pcs 8p 1.25mm connector (https://www.ebay.com/itm/183401683846) - 2pcs 100nF ceramic cap [lcsc search](C86041) - 8pcs 3528 100uF tantalum cap [lcsc search](C7196) - 8pcs 74VHC541 non-inverting buffer [lcsc search](C232797) - 16pcs 0603x4 100/220 ohm resistor [lcsc search](C168187 / C29719) - 1pcs SN74LVC1G08 AND gate [lcsc search](C7666)