Re: ATM A little electronic help on my Foucault tester

["AstroIdiot" <tgooch@arkwest.com>]

You will still need the resistor to keep from drawing too much current
through the led.

Tommy

----- Original Message -----
From: "Thomas A Simmons" <tasimmons@west.raytheon.com>
To: <atm@shore.net>
Sent: Tuesday, December 04, 2001 8:02 AM
Subject: Re: ATM A little electronic help on my Foucault tester


>
> FWIW, I noticed that when the 2 AA batteries in my walkman "die" that they
> have 2.4 to 2.5 volts
> left in the pair, which just happens to be the forward voltage of my LED.
> Next time the LED fails
> to work, I'll measure what is left in the pair (off hand, I think it was
> about a volt). I can get a good
> 10 to 12 hours of >continuos< use from these "dead" batteries.
>
> Tom
>
>