On Mon, 9 Mar 1998, Dan Larson wrote:

> Recalling the relaxation oscillator basaed LED driver from a while back,
PTM: I threw it in here
It worked FB with 0.51V. An AA cell lasted about two weeks.
We do not see any use of going under 0.6V, because there really isn't any
juice in the cell below that. I was surpriced even with what we got.

We tried to make a regulated power source of it with minimum count of
parts, but run out of time. We added one FET and potentiometer.
We tried to take 50mA@5V out of it but didn't succeed. Regulation worked
somehow with about 5..10 mA, but 50mA (100 Ohm) was too much for a load.

If you find some simple ideas, please tell us !

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PTM, pasi.mustalahti@utu.fi, ptmusta@utu.fi, http://www.utu.fi/~ptmusta
Lab.ins. (mikrotuki) ATK-keskus/Mat.Luon.Tdk                    OH1HEK
Lab.engineer (PC support) Computer Center                       OI7234
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