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JohnMarzulli / categorical-sectional

Version of the light-up-map that works with "individually addressable" string lights based on the WS2801.
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Wiring schematic #29

Closed ptader closed 3 years ago

ptader commented 4 years ago

LED strip colors change depending on the vendor (I have red, white and blue wires). Could you describe the Rasberry Pi pinouts to the LED connections. For example:

JohnMarzulli commented 4 years ago

The following description is in the ReadMe:

Wire Color Physical Pin Pin Name
Blue Tied off and shrink wrapped. Not connected. Not connected
Red 25 GRND
Black 23 SCLK
Green/Teal 19 MOSI

Please be aware this is in "Physical Pin" number, which is absolute. It is not the same as normal pin numbering.

Pi Pins

Does this help?

ptader commented 4 years ago

Thanks John.

Well, what I'm trying to figure out is if you look at the LED light strand themselves the 4 pins are labeled, GND, D1, K1, and 5+ (on the input side). If you were to trace one of these connections all the way back to the Raspberry Pi, what pin does it connect to? So say the K1 labeled connection on the LED strand connects all the way back to the physical pin #23 on the Pi. This way you can delete the Wire Color in your text and people with different wire colors can still wire things up.

I appreciate the quick reply but I'm afraid it doesn't matter. I'm in over my head with this. 😄 GND I know connects to GND, so I got that, but the other two connections... well, I don't know. So I tried both ways and I can get past the test... sometimes the LEDs flash erratically, sometimes they are dark.

More tinkering.