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Routing power -or- BUGGER, I think I may have fried it


richard kappler
 

I'm a RTFM kinda guy, not so much a look at the pictures guy.

I finally got all my parts in, finished assembly this morning. I half expected smoke and flames (said in jest), instead I got nothing. ?

Under Step 4: Wire up the Raduino, it says solder the black wire to the DC power socket and solder the orange wire to the DC power switch on the volume control. I dutifully soldered the black to +12V.

My power supply is a little 2.5 amp rig, adjustable up to 15 volts . It works, I tested it, it is set to supply 12.4 volts to the BX, as read on both the installed ps meter and with my multimeter. When I hook it up to my BX, thankfully, it reads 0. I say thankfully because nothing seems to have happened, no readout from the LCD when I turned the volume pot on, but then again, no smoke, sparks or pops either. I turned it off and started in on the BX with my multimeter and sure enough, I had a hard ground. When measuring resistance between the hot and the 2 grounds on the DC power socket) I get a big fat zero point zero zero.

I went back and re-read the directions, it would seem I did it correctly, then I looked at the 1st picture which clearly shows the black going to ground. BUGGER. I unsoldered it, soldered it to ground on the DC power supply, checked with my multimeter, infinite resistance between +12V and ground. HOORAY!!!

But nothing happens when I power it up. Have I most likely fried it, or have I buggered up some other connection? If I've most likely fried it, I'll go order another. Thankfully in this arena stupidity only costs 59USD and about a month of waiting.

I'm hopeful that it's not fried though, as the meter on the ps, when hooked to the BX, never showed even a hint of voltage out. So... with fingers crossed, what would be the next step in troubleshooting? Can I get a little guidance here?

regards, Richard - W2KAP

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