Building Glasgow: Difference between revisions

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We're going to try assembling some Glasgow [https://github.com/GlasgowEmbedded/glasgow] PCBs. The FPGA is BGA, and there are >100 jellybean parts to place, so this will probably involve the [[Reflow Oven]]. Failure is fun!
We're going to try assembling some Glasgow [https://github.com/GlasgowEmbedded/glasgow] 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.
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:
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:
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* We also have solder paste.
* We also have solder paste.


noopwafel plans to buy about 10 board's worth of components; the total BOM cost is about 70eur in these quantities.
noopwafel bought about 10 board's worth of components.
* We managed to import a BOM into Mouser, and to break Digikey's BOM manager.
* We managed to import a BOM into Mouser, and to break Digikey's BOM manager.
* YC248-JR-0710KL is fine (the 'L' is somehow an optional part of the part number...)
* Future thoughts: the HX4K is 1eur cheaper. Also, jellybean parts could be cheaper.
* The HX4K is 1eur cheaper..
* noopwafel has a BOM spreadsheet for managing this now; order split between mouser, digikey and TME.
* noopwafel has a BOM spreadsheet for managing this now; order split between mouser, digikey and TME.
* Parts are all ordered!
* Parts are all ordered! TME ones arrived already, Digikey/Mouser also shipped.


We should put together some simpler boards in the reflow oven. noopwafel plans to try one of the iceGLITCH boards.
We should put together some simpler boards in the reflow oven. noopwafel plans to try one of the iceGLITCH boards.

Revision as of 16:04, 18 January 2020

Project Building Glasgow
Glasgow-render.jpg
debugging PCB assembly so we can build a PCB to debug our PCBs
Status Initializing
Contact noopwafel, Shiz
Last Update 2020-01-18

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:

Glasgow-block-diagram-1.png

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.
  • Parts are all ordered! TME ones arrived already, Digikey/Mouser also shipped.

We should put together some simpler boards in the reflow oven. noopwafel plans to try one of the iceGLITCH boards.