Power supply end covers
thingiverse
I'm happy to help you with your project. Here's what I recommend for the power supply end covers: take a look at this 12 VDC, 20AMP power supply >> http://www.banggood.com/Mini-Switching-Power-Supply-220V-To-12V-20A-250W-for-LED-Strip-Light-p-1017261.html. The mains plug socket/fuse/switch unit is another important component, and you can find a great example here >> http://ftaelectronics.ca/home/iec-320-c14-red-light-rocker-switch-fuse-inlet-male-connector-plug.html. If you're looking for CAD models of the PSU and socket switch, check out this library on GrabCAD: https://grabcad.com/library/power-supply-unit-s-250-12-1 and https://grabcad.com/library/240-ac-power-socket-with-fuse-and-switch-1
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