readme.md

# RGB Meteor Shower Strip

The rgb meteor shower strip module contains 25 `1010-WS2812B` LEDs with 1mmx1mm size and 2.5mm spacing between the LEDs. The optional `CH32V003J4M6` can be used to generate a signal for the LEDs. Otherwise the signal can be sourced from an external controller.

![](docs/top.png)

![](docs/bottom.png)

## Pinout

| Label | Function                      | Pin on ch32 |
| ----- | ----------------------------- | ----------- |
| `-`   | GND                           | -           |
| `I`   | Input for WS2812 signal (PC2) | PC2         |
| `+`   | VCC (+5V)                     | -           |
| `P`   | Programming pin (SWIO/PD4)    | PD4         |
| `O`   | Output of WS2812 signal       | -           |
| `S`   | Sync pin (PC1)                | PC1         |

## Schematics

[Schematics](docs/rgb-meteor-shower.pdf)

## Additional Pads

On the backside are 7 additional pads to expose all pins of the ch32, some are duplicates, to facilitate easy use of I²C or UART.

| Label | Function | Pin on ch32 |
| ----- | -------- | ----------- |
| `D`   | I²C SDA  | PC1         |
| `C`   | I²C SCL  | PC2         |
| `-`   | GND      | -           |
| `T`   | TX       | PD6         |
| `R`   | RX       | PC1         |
| `-`   | GND      | -           |
| `A2`  | custom   | PA2         |