Just a quick word about my experience making and selling SDRAM Boards too encourage other to try too.
I did make 9 SDRAM boards:
- 6 passed the 150 MHz (Send 5 to Europe 1 in the US)
- 2 passed “only” the 140 MHz (I send 1 in the US and keep one form me)
- 1 was destroyed (that was the first one I reversed the header! I destroyed the board trying to fix the issue).
Solder/Clean/Inspect one board might have taken me around 30 mins. You also have to add the testing time (each board was tested for 2-3 hours), the packaging and the trips to the post office. (may be 5-6 hours overall).
I spend $26 to order the boards (10*SDram, 10*IO and 10*RTC) form PCBway (the quality/price is really good).
I spend another $35 to order the SDRAM chips, capacitors from Digikey and an extra $4 for the 20 headers (https://www.ebay.com/itm/20Pcs-2-54mm-P ... 2749.l2649
I sold 7 boards for around $26 without Shipping (SDRAM board + IO board PCB only + RTC board PCB only). For a total of around $170 minus the different fees (Paypal and sometimes Ebay). For a benefice a $105 for 5-6 hours of work.
Do I want to do/sell more short term? No, I need to spend more time with my kids on the weekend and the time spend outweigh the money earned. but I might have one I/O board and one RTC board to sell next month will see.
Do I want to do more in the next 6-8 month? May be. I might do another batch (5 or 10) but only if the community really need more and other guys can’t keep up.
I did some video while soldering a board. I will try to post it. It is easy even if it is SMD. You just have to take your time and have a good soldering iron and some de-soldering wick (https://www.ebay.com/itm/1-5mm-1-5m-Goo ... 2749.l2649
Conclusion: I’m encouraging people to give it a shoot too. I really like the experience, it was fun to make the boards and I also appreciate the felling of contribution (even if it is only a tiny bit) to this great project
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