Building Glasgow
| Project Building Glasgow | |
|---|---|
| |
| debugging PCB assembly so we can build a PCB to debug our PCBs | |
| Status | Initializing |
| Contact | noopwafel, Shiz |
| Last Update | 2020-01-20 |
Wha?
We're going to try assembling some Glasgow [1] PCBs. The FPGA is BGA, and there are >100 jellybean parts to place, so this will probably involve the Reflow Oven. Failure is fun!
If we make this work, then we can probably put a bunch of them together for <100eur each (looks like total BOM+VAT is about 75eur), but for now this is just an experiment.
Glasgow is described as an `open source multitool for digital electronics'; it's basically an FPGA with configurable level shifting for 16 ESD-protected I/O pins, so you can connect it to a whole bunch of random interfaces:
Status
We ordered 50 revC1 PCBs and a stencil from JLCPCB.
- They asked for confirmation that the solder mask layer was meant to be missing the DNP parts, replied.
- They arrived and are in noopwafel's samla.
- We also have solder paste.
noopwafel bought about 10 board's worth of components.
- We managed to import a BOM into Mouser, and to break Digikey's BOM manager.
- Future thoughts: the HX4K is 1eur cheaper. Also, jellybean parts could be cheaper.
- noopwafel has a BOM spreadsheet for managing this now; order split between mouser, digikey and TME.
- In theory, we now have all of the parts we need!
We should put together some simpler boards in the reflow oven. noopwafel plans to try one of the iceGLITCH boards.