Ok, here's what I have at the moment:
Vcc = 12v rail.
The SPST switch is marked as for test purpose, as it is to prevent the DPDT relay from remaining in the same position during simulation (Software doesn't allow me to control Vcc on the fly).
The relay is to switch the PP3 battery from being charged, to supplying the main circuit with the good stuff.
My problem is that I don't know how to stop the battery being charged when it has reached its capacity.
I thought of doing a timed charge (which wouldn't be a problem) through a 555 or something, and then a reed relay. But this is supposed to fit into quite a small box... I already have two relays, three incl one DPDT might be a bit of an ambitious PCB.
Thanks,
Fordy.
Vcc = 12v rail.
The SPST switch is marked as for test purpose, as it is to prevent the DPDT relay from remaining in the same position during simulation (Software doesn't allow me to control Vcc on the fly).
The relay is to switch the PP3 battery from being charged, to supplying the main circuit with the good stuff.
My problem is that I don't know how to stop the battery being charged when it has reached its capacity.
I thought of doing a timed charge (which wouldn't be a problem) through a 555 or something, and then a reed relay. But this is supposed to fit into quite a small box... I already have two relays, three incl one DPDT might be a bit of an ambitious PCB.
Thanks,
Fordy.
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