On 5 Dec 2003 at 21:14, graywolf wrote:
> Well, there has to be some kind of circuity. If you just connect two battery
> packs in parallel they tend to discharge each other. As the voltage of one pack
> goes down it draws current from the other trying to recharge itself, then vis
> versa. Eventually both packs are dead when the device they are in wasn't even
> turned on.
The two diodes would be the circuit, they behave like water stop-valves so
would prevent self discharge of the essentially parallel power sources (plus
reverse polarity protection). An additional diode would probably be provided to
isolate DC power in too as this would prevent the batteries from being
subjected to a charging current.
batt 1 ----|>|----,
+--------- camera
batt 2 ----|>|----|
|
DC pow ----|>|----'
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT) +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications/
Pentax user since 1986, PDMLer since 1998
