yes @retrolefty and @graynomad there is another state with the PIR I forgot to add, or mention, it is that the PIR is put into a "armed" state by another thing happening (I haven't determined what but figured maybe using a RFID tag reader...hold tag to reader, PIR is "armed" ready to look and cause alarm and in this ARMED state from the RFID, the manual switch no longer works. and i need it off off... like drawing 0 power).
I like the idea of a relay. So the switch turns circuit on and off, but if the PIR is armed by the RFID tag, then the relay is tripped to close the circuit regardless of manual switch?
if the circuit is disarmed (with RFID tag), relay is 'untripped' and the switch works again?
this correct ? I wouldn't know where to start on working that. cause the problem I see is my knowledge of relays, lets me take the 5v arduino to trip something that controls much more volts...its almost as if i need a 5v, 5v relay?
Shane