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Amp Power level meter
Amp Power level meter
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Old 5th April 2006, 11:14 PM   #1
bluesmoke is offline bluesmoke  Canada
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Join Date: Mar 2006
Location: Great White North
Default Amp Power level meter


Definitely n00b questions....

I used to have the LED type that radio shack used to sell, and miss it greatly. HATE eBay as the last one I tried to buy got outbid within the last 10 seconds again.....

I think I found the datasheets (LM3915.3916), wondering what the difference is between the ICs. I'd like it to make it with the same switchable 2w/200w range that the RS model had as well... so wondering changing which parts would change the value. .

Thanks a bunch.
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Old 6th April 2006, 08:17 PM   #2
Onra is offline Onra  Germany
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Join Date: Jul 2005
Location: near Frankfurt/M
the main difference is
LM 3914: 10 linear steps;
LM 3915: 30dB in 3dB-steps;
LM 3916: VU-Meter with LED at -20, -10, -7, -5, -3, -1, 0, -1, +2 and +3dB.
Hope this can help.

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Old 6th April 2006, 09:18 PM   #3
acenovelty is offline acenovelty  United States
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Join Date: Aug 2004
Location: SF Bay Area
Take a look at Rod Elliott's project 60. You should be able to calibrate using a switch and different resistor values to make what you want.
Still got my old Radio Shack meter.

Two people can keep a secret if one of them is dead.
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