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AC Lighted Volt Meter Help

rickus

Jan 3, 2012
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Jan 3, 2012
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I have an AC volt meter that includes a small filament to light the display. On the back of the meter are 4 terminals: two for the 120V and two for the filament (3 ~ 6v DC). How do I light the filament along with getting the volt measurement? Sorry if this sounds simplistic (I am a newbie).
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
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25,510
You can connect a small battery to the terminals for the filament.
 

rickus

Jan 3, 2012
3
Joined
Jan 3, 2012
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3
can the light just draw power from the 120v line? If so, I imagine we'd need some kind of conversion.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
Joined
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25,510
A small transformer would be the safest. Can you find one with a (say) 4V secondary?

Maybe you could get a small USB charger and use the 5V from that. Probably cheaper than a transformer.
 
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