3V with 2 AA batteries in parallel? If they were in parallel, you'd get 1.5V only. If you use a bridge rectifier, you'd get a voltage drop of 1.4V since the dc current from the batteries passes through two diodes, each with a theoretical voltage drop of 0.7V. Their actual voltage drop is a little over 0.6V.
If you want a higher voltage output with a really small current load, you'll need to use a voltage multiplier circuit or a step-up transformer with an AC input, not just a bridge rectifier.
Dino- @}
At 09:16 PM 5/9/98 -1000, you wrote:
>Tonite I applied 3v from 2 aa batteries, in parall to 2 bridge
>rectifiers, rated at 250v and 6A from radio shack. the outputs of the
>rectifiers were hooked in series to each other and a resistor was placed
>in line. I took a voltage reading and got .3V. I had planned for it to
>raise the voltage to 6V (probably halve the current) but why such the
>low E reading? is it the voltage drop across 4 diodes at any given point
>in time?
>BillP
>
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