Brand Spankin New Wiring Diagram (is it correct)

Post by **marshallh** » Sat Mar 25, 2006 4:55 pm

daguuy wrote:my 8.4v charger is 19v

I assume you tested the voltage with no load on it? When it's charging a battery, the voltage will drop down lower.

To charge a battery, you essentially feed it voltage 1-2 volts higher than its rated voltage.

vgcollector666 · Post by **vgcollector666** » Sat Mar 25, 2006 4:59 pm

so marshallh, if my voltage coming off the battery when on the charger is less than 9v, it will be ok?

usbcd36 · Post by **usbcd36** » Sat Mar 25, 2006 9:24 pm

It still may not charge the battery, even if it's an ok voltage, and it might not have enough power to run the portable either (that design takes about 1.5 amps @ 7.5v). I'd suggest a battery that you can integrate the whole charger into the portable and only have to feed it some power (like 12v, if you used a AA car charger) to make it work. Then you power both the portable and the charger from the same adapter (just drop a 7808 in the line for the screen so you don't fry it. Only have it come into play when you plug in the charger.)

Here's my diagram: