AVR Component Tester, customizable, with schematics
thingiverse
This is an enclosure for a component tester of my design. You can by a tester like this for $5 (without enclosure), but why buy when you can build one yourself for $100? :-) For software, parts list and build instructions of the electronics, go to https://github.com/jonsag/avrComponentTester. To customize, download all scad files and edit casing.scad. You will also need the (incredible) OpenSCAD library at https://github.com/nophead/NopSCADlib and adapt the paths to this library in the other two scad files. To get a knob for the rotary encoder, you can design one with this thing: https://www.thingiverse.com/thing:4712953.
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