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mstratman / vu-meter-driver

Driver circuit for analog DC "VU" meters

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Panel Meter Specs

Andrew-Hanlon opened this issue · comments

commented

Thanks for the great pedal add on - I have ordered a couple of the kits!

Can you add some additional detail around the required Panel Meter specs? I am assuming it is a DC volt meter, but in what range is usable? Thanks!

commented

Yes a DC volt meter. I'm going to guess any meter will work with it. (within a reasonable range of your power supply)

That said, I'll try to measure or calculate its range later for the values listed in the schematic. However even if you got a meter that was hard to dial in, you can pretty easily switch the gain with component swaps, or change the sensitivity of the RV pot/trimmer.

commented

Thanks @mstratman for the information and I would certainly appreciate the additional info for the OOTB sensitivity range.

commented

I did a quick and dirty test and was getting it to go up to about 3V.

commented

Thanks kindly @mstratman . I guess that makes sense - basically the meter's range should be below the approximate half rail voltage (4.5v) and then adjust the gain to suit. Cheers.

commented

Yeah, exactly. To be clear that was with a 9V supply.