Guru
Joined: 05/10/2019
Location: United KingdomPosts: 6832
| Posted: 09:38am 03 Oct 2024 |
I've not sorted out a BOM yet so I've not much idea of cost. All the bits are available on AE (that's where I got them originally). The VS1953 is the most expensive at around £5 +VAT. The hub is about £2 and the micro SD card module about 50p. The USB connectors usually come in bags of 5 or 10 for £2 or so. The VGA socket is about £1.20 for 5.
The D connector is the most awkward. Different makes vary enough to make them non-interchangeable so I have a RS part number for that. You can compare its drawing with whatever you can find.
The PGA2350 is easily the most expensive bit.
The enclosure (if you want one) is a cheap Hammond RM2015S. Easier to get and cheaper than the CMM2 version. Same one as Peter has used for his reference design.
The decoupling caps are on the micro SD module, along with some pullups on the data lines. I've used these a few times now and never even bothered with the series resistor. They have been fine. I could add space for extra decoupling, I suppose.