AVR-Chat

At 02:17 PM 7/30/2004, Ken Holt wrote:


>4 NiMH batteries is a good starting point, but remember that you'll
>only get 4.4 - 4.6V (series total) over most of the discharge curve.

Actually, they are dead, for this app, at 1V/Cell, so 4V.
An additional cell wouldn't be a bad idea, if the head can take the max voltage.
If the charger is connected while the head is connected, that can be 1.6V/Cell, or 8V.
If you D/C the head while charging (and you need to have than mechanism in place anyway) then you only have to withstand about 1.3V/Cell or 6.5V.