Recent content by licketylips1

  1. L

    555 timer Relay driver with TTL input

    Hi HarryA , Yes I think using a transistor / cap to pull pin 2 low is the only way to do it. My relay resistance is 370ohms.
  2. L

    555 timer Relay driver with TTL input

    Hello, I want to drive a 12v relay off a 555 timer after being triggered by a 12v PIR sensor. The sensor has a 3.3V TTL output which goes HI when the sensor is triggered. Once the sensor turns off the TTL output returns to 0V. -I  want the Relay to turn on for up to 1 minute (can be...
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