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This has probably already been done before, but I found this to be a cheap and useful mod for an MPU. These 3 digit displays are available on Ebay for $3-$5 each, and gives you a quick check of your voltages in case you need to do some troubleshooting. I think will start putting them on all my games!
Quoted from cfh:Best to mount them on the wiring harness not the boards themselves.
Yeah, wasn't quite sure the best way to mount them. I ended up using some quick set epoxy and adhering the 2 displays to a thin piece of cardboard, then using double-stick to affix to the mpu on a flat spot w/ no components. I should be able to remove easily if/when I ever need to.
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Houston, TX