I bought a couple of preamp boards from Ebay. I have posted about this set-up I am trying to build before. The problem I now have is with a 7812 power regulator circuit that I am trying to add to power other parts of the unit.
Basically, the problem seems to be that the preamp boards neutral lines are held to ground. This seems to be causing a diode to blow in my power regulator circuit or have I missed something that is obviously stupid to you guys?
What do you guys suggest to get me out of this corner I am in? Is there another power reg circuit I can use that is workable with the neutral held to ground or can I just clip the output and input grounds to the preamp boards?
I will try to upload my schematic and PCB express files to aid you in helping me with this problem.
Thanks
Larry
Addendum: OK I cannot send a pcb file for some reason but I have managed to attach the sch file.
Basically, the problem seems to be that the preamp boards neutral lines are held to ground. This seems to be causing a diode to blow in my power regulator circuit or have I missed something that is obviously stupid to you guys?
What do you guys suggest to get me out of this corner I am in? Is there another power reg circuit I can use that is workable with the neutral held to ground or can I just clip the output and input grounds to the preamp boards?
I will try to upload my schematic and PCB express files to aid you in helping me with this problem.
Thanks
Larry
Addendum: OK I cannot send a pcb file for some reason but I have managed to attach the sch file.
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