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Re: Neon Indicator Lights for Increasing Voltage?
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- Subject: Re: Neon Indicator Lights for Increasing Voltage?
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Tue, 30 Nov 2004 07:59:09 -0700
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Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
What voltage range do you want to measure? Neon bulbs don't light up until
the voltage is about 90 volts. So the range of voltage you would measure
with 10 neon bulbs would be something like 90 to 180 volts. They extinguish
when the voltage is somewhat lower than 90, say 75 volts. But if you are
going to use them in the vicinity of a running Tesla coil, then all bets are
off. They will light up from the intense ES fields from the coil unless you
go to great pains to shield them.
If you want to measure lower voltages, then there are LED devices
specifically made to do as you want. For example, the rows of LEDs in a
stereo receiver that indicate instantaneous loudness. You can buy them at
electronic surplus outlets, or perhaps Radio Shack carries them. You can
use a pair of resistors to make a voltage divider to run them from higher
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
Sent: Monday, November 29, 2004 7:41 AM
Subject: Neon Indicator Lights for Increasing Voltage?
> Original poster: "Tedd Payne" <teddp2@xxxxxxxxxxx>
> Hi All,
> I think somewhere I've seen or heard of a "ladder" of neon bulbs (the
> little AC indicator type) which lights up in sequence with increasing
> voltage. Can someone point me to such a circuit?