> Trying to run a PIC 16F84 with 2V i came to tihnk if there is any
> possibilities to make a LED to run with only one NiCd that has the output
> valtage of about 1.2 V. Led needs about 1.6 V.
> The system should not have any fancy IC's and it should fit in the size
of
> half of an AAA-cell.

A couple of transistors/FETs and a capacitor to make a charge pump doubler.

Steve.

I dismantled a SONY remote that used 1 battery technology and the circuit is
simple a transistor is used to energise a coil and the led is the catch diode
(it comes on as the transistor goes off) try it some time with a relay use a
LED to catch the back emf it flashes small inductors are cheep and cost less
than charge pump but the still need the resiviour cap close to them simple
idea but effictive ..

Cheers Steve (a different one) ..........