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 | 2020-01-08 |
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, 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 shipped!
noopwafel plans to buy about 10 board's worth of components; the total BOM cost is about 70eur in these quantities.
- We managed to import a BOM into Mouser, and to break Digikey's BOM manager.
- Mouser has almost all the components, except we need to substitute some jellybean parts and some LEDs.
- Still need to check whether they all make sense.
- The FPGA is only available in useful (small) quantities from Digikey. Will check prices for other components there and then split the order if needed.
- YC248-JR-0710KL is fine (the 'L' is somehow an optional part of the part number...)
- The HX4K is 1eur cheaper..
Also checked whether there's anything which is cheaper to buy in larger quantities:
- 100: YC248-JR-0733RL
We should put together some simpler boards in the reflow oven. noopwafel plans to try one of the iceGLITCH boards.