How To Use A Generic 32x8 LED Matix

Other Hardware LEDs and Multiplexing
1

I was excited to find this 32x8 LED matrix at a local hardware store so I bought it on the spot. The problem is that I can't find any literature about it. It is similar to the Sure model with an HT1632C controller but has an on-board MEGA8 controller. The following is silkscreened on the back of the board (obviously referring to the connections):

Have mega8 No Mega8
MISO GND WR GND
SCK RXD DATA NC
RST TXD NC NC
NC GND NC GND
MOSI VCC CS VCC

Since it does have the MEGA8 soldered in, does any one have any idea how to use this with the Arduino Uno?

2

Sure, looks like you send it SPI commands which it interprets and lights up LEDs accordingly.
No idea what those commands would be.
No other data to go on?

3

So it turns out (after much googling) that the unit is a JY-MCU 3208 Lattice Clock HT1632C Driver with MCU & Support Secondary Development. I still can't find any documentation about it but a few people have hacked it and posted. Unfortunately there's not much to go on.

4

I think there are Sure Electronics displays that use that same HT1632C drive chip. Pretty sure you can work out something from their documentation.

There's even an arduino page on it in the playground

http://arduino.cc/playground/Main/HT1632C

Manufacturer's data sheet found here
http://www.holtek.com/english/docum/consumer/1632c.htm

I see several hits at www.adafruit.com also