Convert NC relay output to drive 2nd relay inversely

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Convert NC relay output to drive 2nd relay inversely

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Use with a PIR motion detector (which are only Normally Closed when not tripped, and go Normally Open when tripped) to drive a relay to reverse output (IE 2nd relay will go Normally Closed when PIR is tripped - to drive a light, buzzer, logic output etc) Diode = 1N4001 Q1 & Q2 2N2222 (can drive large relays up to 0.5A coil), Resistors 1/4w (signal power only) Relay = 12V automotive or PCB. Can also drive 5V relay with 5V power supply

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Creator

jorash68

1 Circuit

Date Created

3 years, 2 months ago

Last Modified

3 years, 2 months ago

Tags

  • inverting
  • relay control
  • switch transistor
  • relay nc
  • relay no
  • relay circuit