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Old 18th May 2008, 03:16 PM   #1
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Default how to Analog Panel Meter's

hi,

i weant to add Analog Panel Meter's for my amp.

i need circuit for few types of panel meters.


ampaire meter. voltage meter, sound db meter.

thank you.
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Old 18th May 2008, 03:30 PM   #2
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What kind of meters do you have in mind ?
Electronic with LEDs, Digital displays or old times analog meters ?
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Old 18th May 2008, 04:39 PM   #3
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hi,

i need old type analog meter circuit. i can perchase the analog meter panel here.

they are nice.

thanks for help.
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Old 18th May 2008, 04:49 PM   #4
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Then it is just to place a shunt resistor across the meter inputs.
do you have any info on the meters you want to use ?
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Old 18th May 2008, 05:02 PM   #5
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something like this should work. R1+R2 should total at least 20k or so. you could make R2 a 1k resistor, and R1 a 50k or 100k pot to make it adjustable.
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Old 18th May 2008, 05:07 PM   #6
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what is value for each meter? nolt emter, db meter, ampire meter?

thanks.
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Old 18th May 2008, 06:48 PM   #7
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it's something you'll have to figure out. different meter movements have different internal resistances. that and your amp output power determine the resistor ratio you would use. some meter movements also have internal shunts or dropping resistors. it's not something you can just drop resistor values into.
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Old 18th May 2008, 09:11 PM   #8
taj is offline taj
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If you (or anyone) decide to use LEDs, the old Harmon Kardon Citation 16 meters were pretty cool. The service manual has complete schematics and even a separate PCB layout for them.

I plan to build that one day.

I think all that info is on Jan's website. (I'm too lazy to look, but I'll bet it's there.)

..Todd
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Old 19th May 2008, 03:12 AM   #9
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taj;

I did for you

http://www.audio-circuit.dk/Schemati...Sixteen_sm.pdf
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Old 20th May 2008, 06:10 AM   #10
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Hi,

i have a panel analog meter. it is up to 10 ampire can check (onld type). how can i make it to show me ampire of the transformer voltage for testing perpose? panel back side containing only two lines, + and -.

thank you.
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