Would a PIR

[mayflower232]

In theory, would the below circuit work in that the PIR would actively control the lights when the switch was not in use. I am unsure as to whether PIR sensors act like simple switches or whether they act as a one way road, meaning that if the switch was in the on position would it fry the PIR?

 

[ericmark]

All depends on PIR used some can be used with a switch in parallel others can't. Only way is the read the data sheet for the PIR you want to use.

 

[bernardgreen]

You should wire it like this

PIR with overrides

• bernardgreen
• 18 Mar 2011
• 20

Using two single pole switches to provide overrides for a basic PIR

And use a PIR with a mechanical switch ( relay contact ) and NOT a solid state switch as the leakage in a solid state switch will mean the LEDs may glow dimly when OFF.

A mechanical switch will have a protective circuit which also leaks a bit of current when OFF so a snubber may be needed if the LEDs still glow when OFF

 

[ban-all-sheds]

I am unsure as to whether PIR sensors act like simple switches or whether they act as a one way road, meaning that if the switch was in the on position would it fry the PIR?

¿Que?

• http://www.google.co.uk/search?q=electricity+(101+OR+basics+OR+fundamentals+OR+introduction)
  
  
• http://www.google.co.uk/search?q=electrical+circuits+(101+OR+basics+OR+fundamentals+OR+introduction)
  
  
• http://kevinboone.net/electricity.html