Amp Power level meter

bluesmoke · 5th April 2006, 11:14 PM

Hi,

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.

Onra · 6th April 2006, 08:17 PM

Hi,
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.

Onra

acenovelty · 6th April 2006, 09:18 PM

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.

http://sound.westhost.com/project60.htm

5th April 2006, 11:14 PM	#1
bluesmoke diyAudio Member Join Date: Mar 2006 Location: Great White North	Amp Power level meter Hi, 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.

6th April 2006, 09:18 PM	#3
acenovelty diyAudio Member 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. http://sound.westhost.com/project60.htm __________________ Two people can keep a secret if one of them is dead.

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6th April 2006, 08:17 PM	#2
Onra diyAudio Member Join Date: Jul 2005 Location: near Frankfurt/M	Hi, 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. Onra