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Re: ATM A little electronic help on my Foucault tester

To: "James Taylor" <u2pilot@satx.rr.com>, "ATM List" <ATM@shore.net>
Subject: Re: ATM A little electronic help on my Foucault tester
From: "Nils Olof Carlin" <nilsolof.carlin@telia.com>
Date: Tue, 4 Dec 2001 06:52:15 +0100
References: <004101c17c4e$79953740$5d134542@satx.rr.com>
Reply-To: "Nils Olof Carlin" <nilsolof.carlin@telia.com>
Sender: owner-atm@shore.net

James Taylor wrote:

> Super Bright White: 1.82V +/- .03V and 20mA.  This baby puts out 5000mcd at
> 660nm wavelength.

To me, both 660nm and 1.82 volts suggests these specs are for a red diode. A white one would take something like 3.6v at 20 mA, judging from my catalog and from the physics of it.

If so, use the formulae given in the other replies to run it off 4.5 or 6V.

Nils Olof

Follow-Ups:
- Re: ATM A little electronic help on my Foucault tester
  - From: Daniel Fundo <fundo@bellsouth.net>

References:
- ATM A little electronic help on my Foucault tester
  - From: "James Taylor" <u2pilot@satx.rr.com>

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