SB_Pixel_Count
Copyright and Disclaimer
Copyright: Scott Hanson
This documentation describes Open Hardware and is licensed under the CERN Open Hardware License Version 2 - Strongly Reciprocal. (CERN-OHL-S)
You may redistribute and modify this documentation under the terms of the CERN OHL-S-v2 (https://ohwr.org/cern_ohl_s_v2.txt). This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN OHL v2-S for applicable conditions
Under CERN OHL-S-v2, derivative work must be publicly released as defined in subsection 3.3
SB Pixel Count
SB Pixel Count is a ‘pocket’ Pixel Counter. The original (V1) board uses a Waveshare RP2040-Tiny Development Board. All the design files are open source and available on github.
To order PCBs upload the “GERBER-SB_Pixel_Count.zip” file in the “V1\PCB\jlcpcb\production_files” folder to jlcpcb.com. Use the “BOM-SB_Pixel_Count.csv” for the JLC Assembly BOM and “CPL-SB_Pixel_Count.csv” as the footprint placement file.
Assembly
The raw PCB’s from JLC will be missing the RP2040-Tiny, OLED, Push Button and PigTails. These parts need to be soldered manually. The case is designed for flat pigtails.
Print the case out of PETG with 0.1mm layer height. Use #2-56 3/8” machine screws for case.
Board Variants
This repo tracks a few PCB/firmware revisions side by side. Firmware/SB_Pixel_Count/BoardConfig.h selects the pin mapping for each via a build flag (VERSION1/VERSION2/VERSION3); the default is VERSION2.
| Variant | Folder | MCU module | Firmware | Interactive BOM | Notes |
|---|---|---|---|---|---|
| V1 (Original) | V1/ |
Waveshare RP2040-Tiny | VERSION1 |
Open | The board described above. |
| V2 | V2/ |
Seeed XIAO RP2040 | VERSION2 (default) |
Open | Standard redesign around the XIAO RP2040 module - firmware updates over USB (drag-and-drop UF2), no external programmer needed. |
| V2 Lite | V2 Lite/ |
ATtiny1614 (megaTinyCore) | Firmware/ATtiny1614_Count/ |
Open | Cost-reduced BOM built around a bare ATtiny1614 instead of a RP2040 module; trades USB firmware updates for a UPDI programmer requirement. Uses FAB_LED/SSD1306Ascii instead of the Adafruit libraries to fit in 16KB flash / 2KB RAM. Shares the same case as V2 (V2/Case/ and V2 Lite/Case/ are the same design). |
| V3 Pro | V3 Pro/ |
Seeed XIAO RP2040 | VERSION3 |
Open | Adds a second button and a microSD card slot for playing back xLights FSEQ sequences on the strip (Firmware/SB_Pixel_Count/FseqPlayer.*). |
Each variant folder that has its own PCB/ directory also has its own jlcpcb/production_files gerbers/BOM/CPL for ordering that specific board.
Video of SB Pixel Count
Part BOM
