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preenfm2 and preenfm3 / Re: PCB ready
« on: January 13, 2018, 06:57:35 AM »[Anyways I have 10pcs now and by the end of this week I plan to solder and run my test programs on one.
I've managed to solder 2 boards. On my first try each processor was working on the other board. Quickly traced this to a short and some passives soldered to one end only. Now I have both uP blinking LEDs on both boards but I haven't done any more testing.
Unfortunately I've over-estimated my soldering. It took me a total 6 hours to solder these 2 board (so 3h/board).
All the ICs went very fast, probably an hour for both boards. The switches, encoders and electrolytic caps another half an hour. What's killing the rest of the time are the passives. There are 144 passives per board with 2 ends each ;-) and you have to pay attention to all the different values. That comes to about 1 minute per passive.
With this time consuming experience in mind I probably won't solder anymore boards any time soon. I'll have to forget about all those 0603's first. For my future testing I won't need any more anyways.
The good news is that I haven't found anything wrong (yet) with my design like unmatched footprints or schematic faults. The next few days I'll prove all the audio chain and then I'll be ready to install the real software.
This is how I've spent my Friday evening and night ...