Time delay relay on

Thread Starter

Dookers

Joined Mar 31, 2012
1
I need a 5 second delayed relay driver with some qualifications -
When the input goes to ground momentarily. 5 seconds later, the output closure occurs for 1 second, then opens. Must automatically reset. No rst pulse available.

The delayed relay driver can be done with a 555 timer but it must latch after the input ground is removed, then 5 seconds later produce a 1 second duration closure which will close a relay.

Suggestions will be appreciated.
 
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