Steve2381
Senior Member
Hi all.
I am playing with a Biss0001 PIR controller chip (found one in the workshop).
I would like to connect it to an 18m2.
My thoughts are to lose the 1M 'time' pot on pin 3, thus leaving it set to minimum 'on' time. I can then deal with the timing using the Picaxe.
Set pin 1 high - which is retriggerable mode.
Connect output pin 2 directly to the Picaxe.
The Picaxe will have a relay output. Basically the Picaxe is controlling the timing after its been triggered (plus lots of other features - eg, a DS1307 etc).
But... there is a 1M pot on pin 12 that controls the sensivity. How can I control this pot/input/feature using the Picaxe?
My original thought was to use an AD5242BRZ1M digital pot. But these ain't cheap and I was wondering if I was missing a much simpler method?
http://docs-europe.electrocomponents.com/webdocs/0700/0900766b80700a24.pdf
Thanks for any assistance
I am playing with a Biss0001 PIR controller chip (found one in the workshop).
I would like to connect it to an 18m2.
My thoughts are to lose the 1M 'time' pot on pin 3, thus leaving it set to minimum 'on' time. I can then deal with the timing using the Picaxe.
Set pin 1 high - which is retriggerable mode.
Connect output pin 2 directly to the Picaxe.
The Picaxe will have a relay output. Basically the Picaxe is controlling the timing after its been triggered (plus lots of other features - eg, a DS1307 etc).
But... there is a 1M pot on pin 12 that controls the sensivity. How can I control this pot/input/feature using the Picaxe?
My original thought was to use an AD5242BRZ1M digital pot. But these ain't cheap and I was wondering if I was missing a much simpler method?
http://docs-europe.electrocomponents.com/webdocs/0700/0900766b80700a24.pdf
Thanks for any assistance