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Topic: Soldering Problem (Read 376 times) previous topic - next topic


Aug 17, 2017, 06:39 pm Last Edit: Aug 17, 2017, 06:46 pm by VenomuSnake
Hey guys ! I'm starting a project ( Robot Head ) but i want to do the led matrix myself to have the perfect size, so i made my little research and i found this : https://www.youtube.com/watch?v=aUXmEDp4_m4 ( SEE AT 1:17 / 1:18 )

This guy soldered 4 chip but i'm lost, he wind all the wires and i can't see how to do like him, can someone make me rough diagram to help me ! Thank you !


Why don't you ask the guy who did it? Perhaps he doesn't know that it's not easy to follow and needs to be clearer?
Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield


Already tried but no response, that's why i'm asking you guys ><


Take a look at the datasheet, especially the pinouts, typical application circuit diagrams, and figure 3 on page 13.
It's just a serial connection:
The clock line is common to all chips, just like the CS (+latch) line. All chips have a serial data in and a serial data out. The serial data out of the first chip goes to the serial data in of the next chip.
Power and ground are also shared.



It looks to me like he is just connecting:

All VIN in parallel
All GND in parallel
All CK in Parallel

Daisy chaining Data  out to Data in of each board.

Do you have this same board?

Please do not PM me with thread based messages.  If your thoughts are worth responding,  the group should benefit from your insight.

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