The PCB I have ordered from OSH Park arrived.
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| PCB vs original SOIC-18 microcontroller |
The milling wasn't completely perfect, but it is good enough for my needs. The drill hole is small 0.0197" (0.5mm). One side of the milling was at the mid point of the hole which is the edge of my outline.
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| Some of the copper were removed by the milling |
The goal of the tiny PCB is to replace the hand wired mod.
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| Hand wired mod vs PCB |
I taped down the PCB for soldering/hot air reflow.
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| I used 3 pieces of "Kapton" tape tohold down the PCB. |
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| Side view f the solder joints |
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| PCB soldered. Blue wires are for SWIM programming |
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| It's alive! |
Links:
Part 1,
Part 2
PCB can be ordered from https://oshpark.com/shared_projects/nWySOWYk
It is a 2 layers 0.031" (0.8mm) thick PCB
Project file: https://github.com/FPGA-Computer/USB-Voltage-Current-Meter
