Need help with a circuit design which can fulfill the below mentioned criteria:
Circuit status is normal when power on, when triggered (through a magnetic contact switch by opening a door) should start a timer delay for 15 seconds, on expiry of the delay the relay should come on for 4 seconds, and then circuit should back in normal status. during the course of the 15 seconds timing delay a reset should also be available to bypass the relay on for 4 seconds.
thanks
Circuit status is normal when power on, when triggered (through a magnetic contact switch by opening a door) should start a timer delay for 15 seconds, on expiry of the delay the relay should come on for 4 seconds, and then circuit should back in normal status. during the course of the 15 seconds timing delay a reset should also be available to bypass the relay on for 4 seconds.
thanks