Relay triggering circuits

Helloo I have a gsm control for my automatic gate. Gsm control have only one relay output, that can only open my gate, not close, because open and close switches different in automatic gate.. can any one please make a circuit for me to solve this... One switch triggering circuit. That will work like one time one relay other time second relay .. relay need to close only for two seconds only... Pls help

by Jammu
September 22, 2018

Time delay relays tend to be expensive. You need two, one for the gate dwell and one for the two second pulse.

https://uk.rs-online.com/web/c/automation-control-gear/timers-counters/time-delay-relays/?pn=1

by mikerogerswsm
September 23, 2018
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