This is the repository that contains the xmas 2021 badge schematic and pcb. The badge is equipped with an STM8L101F2P3 MCU, a coin cell, a push button and 7 LEDs. There are various test point so you can play with it, if you want.
A jig programmer adapter is provided in prog_adapter. Since a lot of PCBs were made, the adapter gave an huge help during the programming phase: no extra pin header or soldering required.
The BoM has been kept as minimal as possible to reduce costs.
| Annotation | Part | Package | Q.ty | Note |
|---|---|---|---|---|
| BT1 | BH57A-5 | 1 | CR1616/CR1620 battery holder | |
| C1, C3 | 100nF | 0603 | 2 | |
| C2 | 10uF | 0603 | 1 | |
| D1 - D7 | LED | 0603 | 7 | Red, Green, Blue, Orange SMD LEDs |
| J1 | 00-9155-004-251-006 | 0 | Slide contact, receiver footprint only | |
| R1, R2 | 4k7 | 0603 | 2 | I2C optional pull-up |
| R3 - R9 | 100 - 150 | 0603 | 7 | LEDs resistor |
| SW1 | PTS526 SK15 SMTR2 LFS | 1 | User button | |
| U1 | STM8L101F2P3 | TSSOP20 | 1 | MCU |
The PCB cutout and top silk screen were traced from a PNG icon (see credits below) using svg2shenzhen, an Inkscape plugin. The source image in both PNG and SVG (traced from the PNG) can be found in res. The svg2shenzhen output is a KiCad library.
The resulting PCB:
The firmware can be found here. Thanks @SebastianoC94!
The firmware can be flashed with any SWIM-capable probe (JLink, STLinkV2/V3).
- @SebastianoC94
- KiCad
- svg2shenzhen
- PCB cutout traced from this flaticon image. Artist: Freepik