A watchdog circuit diagram

Posted on Mar 28, 2007

As Figure: when the operation of the circuit as long as the timing of the reset pulse to the CD4060, we can guarantee the state ended in Q1, so that the NMOS transistor control

A watchdog circuit diagram
Click here to download the full size of the above Circuit.

led in the on state power to the processor circuitry. The advantage of this circuit is that the timing of the time can be relatively long, a few minutes no problem, it can take a long time to those who have enough time to initialize the system for initialization. Pulse trigger the dogs, when the power through R2, C1, R3 an automatic reset pulse to the counter to ensure that there is an output Vout. Circuit costs low.The biggest drawback of this circuit is that the dogs require a relatively wide pulse.

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