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The assembly guide is currently being written, but assembly should not be too different from most electronics projects. A few things to note:
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* It is recommended to socket all DIP ICs.
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* Do not populate RN2 until the ESP32's 3.3v flash setting efuse has been burned. Instructions regarding this can be found in the flashing guide on the main MegaGRRL repo.
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* Populate the SD card slot before the heatsink or USB connector. The positioning of these parts can make the SD card slot difficult to mount.
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* The ground pad on the bottom of the ESP32 does not need to be soldered.
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* Screw the 7805 to the heatsink before soldering either part. This will ensure the regulator is spaced the proper height above the PCB.
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* DIP switches should all be on for YM2612, all off for YM3438. This is also listed on the PCB silkscreen.
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* The last parts populated should be the YM2612 and SN76489. This can be done after firmware has been flashed.
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* For 3D printing the baseplate, 100% infill is recommended (the print is so thin, most slicers would make it solid anyway). Supports are also needed for the recessed screw holes. The OpenSCAD file uses mils, you will need to resize the resulting STL to 2.54% to print in standard mm. |
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