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A time delay relay circuit is a relay that stays on for a certain amount of time once activated. This time delay relay is made up of a adjustable timer circuit which controls the actual relay. The time is adjustable from 0 to about 20 seconds with the parts specified. The current capacity of the circuit is only limited by what kind of relay you decide to use.
Note:
- R1 adjusts the on delay time.
- use a different capacitor for C1 to change the maximum on time.
- S1 is used to activate the timing cycle.
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