[sdiy] thanks for replies - Blue LED

[John Luciani]

On 10/22/06, Bert Schiettecatte <bert at percussa.com> wrote:

>
> I did some experiments with 2 and 3 cell AAA packs and it doesn't look
> like a pump circuit with a hex inverter and some 10uF caps can keep
> delivering the necessary current/voltage for the LED (around 30mA)...

A problem with using the output of a hex inverter to source and sink current
is the output impedance is too high. It may be hard to find an inverter with
a low enough impedance that also meets your low cost requirement.

An inverter made with a complementary P and N channel FETs would work
but again may not meet your price target.

(* jcl *)



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