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Created September 11, 2021
Last modified September 24, 2021
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This circuit monitors the input at connector K2. On a falling edge (K2 connected to Ground), a timer is started via a 555 IC in monostable configuration. Once the timer lapse (timeout), the output on K3 goes to logic level 1, and the LED3 is lit. The signal on output 3 can be used in other circuits to incorporate the timeout functionality.


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