When things go wrong and how we fix them
summary
FPGA badge hardware runs into three concrete failures and the fixes used: a stencil ordered with apertures on the wrong side is patched by covering holes with kapton tape and topping up missing pads with a syringe of solder paste, using a DIY vacuum bed for alignment; population failures trace to a shorted 48 MHz crystal that self-heats and detaches (boards draw ~1 A when shorted, then ~16 mA after removal); a misrouted trace on the add‑on button is cut, scraped, and bridged with a jumper across ~50 units to restore the LED drive.
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chapters (7)
- 0:00Introduction
- 1:08Project failures hardware
- 2:11Stencil mix-up solder paste
- 11:18Missing fuse self-disassembling
- 19:06Party button PCB fix
- 27:14Q&A stencil PCB tools
- 32:18Wrap-up and final thoughts
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