3 ms·

There's a BOM, you can find out. Plus some peanuts for the PCB :) Now whether you get it populated or not.. https://github.com/Nicholas-L-Johnson/flip-card/bl

• unwind 1y ago
  Just as a point of interest perhaps for folks who are not familiar with PCB design and modern electronics: the "huge" matrix of 21x21=441 LEDs would, with the specified LED from the bill of materials (BOM) cost all of $6. That is based on the price for low quantity (1-500 pieces) though; if you were to build more than one board you would buy more LEDs, pushing the per-LED price (way) down. You can get 4,000 LEDs for $30.' Edit: here is the LED in question, from the BOM [1]. [1]: https://jlcpcb.com/partdetail/C497920 https://jlcpcb.com/partdetail/C497920