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555 with Long Delays using transistors

@oldjob
10 years ago
https://everycircuit.com/circuit/5757293463863296
This has the same settings as my other timer but the delay is many times longer. I can now set delays in hours without overly large capacitors and resistors. Tap the logic button on the left to start the on timer, press again to start the off timer. I will use this on my chicken door.
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