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Topic: Help with 8x8 RG LED matrix w/ TM1640 chip (Read 2133 times) previous topic - next topic

rclymer

Hello, I ordered cheapo ebay chinese 8x8 RG led matrix with a TM1640 chip. Here is below.
http://www.ebay.com/itm/281074255809?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2648

The only libraries I can find for this are 7 segment timer displays, not an 8x8 matrix. Not only can I not find code/libraries, the ebay ad was the only bit of documentation I could find, but now, none of the images/files load. There isn't even wire labels on the board, so I have no idea which pin is VCC, GRND, CLCK, and DATA.

Between mystery wiring and a lack of code resources, this project has come to a stand still.

I need your help Arduino community.

johnwasser

Find the chip datasheet and trace the inputs to the chip pins to see what each input does.
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gjulius

#2
Nov 14, 2013, 08:50 pm Last Edit: Nov 14, 2013, 08:53 pm by gjulius Reason: 1
Hello.
I think i bought the same 8x8rg matrix and struggled to get it running.

There is a modified libary for 8x8 red green matrix from where i bough it.
(http://www.play-zone.ch/de/8x8-dual-color-led-matrix-mit-tm1640-treiber.html)

As i had the same issue with the pins i asked the shop for support and they posted a picture:
the 4 pins (starting where the print is COM0...8 ) are: DIN, CLK, GND, VCC

I hope i could help you. (I know it has been long since you posted this topic).
Or maybe it helps someone else.

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