Project Panel Top and Bottom

thingiverse

Project panels used for a prototype battery testing rig Top panel has square holes (45.2 x 26.80 mm) for a panel voltmeter (PM528) and panel ammeter (574) 4 small 5mm holes for switches 4 larger 7.5mm holes for banana jacks The underside of the top panel has 4 bosses with holes in the ends to screw in a PCB The bottom panel has some ribbing to reinforce The top and bottom panel are meant to be joined using standoffs that both panels are screwed into The main idea behind the panels was to allow for easy assembly vs using a project box As for the battery tester: The 4 switches are meant to switch 5.1 Ohm load resistors on/off 2 banana plugs are for power to the PCB (I used a 12V supply, to power the meters) 2 banana plugs are for connections to the battery being tested The idea was to be able to test the battery with 1-4 loads, to see how much current they could source and also what the voltage is under load. I was able to quickly see which of my rechargeable batteries are still useful. Some of them seem to charge up fine but they don't provide much current. After testing a bunch of same format batteries it became easy to compare. The 4 bosses are a little fragile before the PCB is attached, be careful