HI , I'm an extreme novice and want to make a salvaged PIR+ relay +windscreen pump,squirting device.
HI everybody, i followed this instructablehttps://www.instructables.com/id/Re-purposing-an-Air-Wick-Freshmatic-Compact-i-Moti/step4/Aproach-1B-Digitized-Sensor-Output-Small-Module/ and the pir is outputting +-4.7 v. i purchased a rs5 5v (coil) 12v switch relay. I have connected the output of the PIR to the relay coil and i am trying to use this to switch on a 12v windscreen washer pump. I can switch the relay with 3x 1.5v cells directly and the pump activates but when i use the output of the PIR to try and switch the relay, nothing happens. I am assuming it is a ( Icurrent ) problem but as i say I dont have a clue.please help.?