I'm looking for a circuit to extend my 24v linear actuator all the way out and then all the way back in when I push a button. I've tried mechanical switches but I want the cycle to be automatic.

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    \$\begingroup\$ Use the limit switches that latch, or use limit switches to control latching relays (or regular relays wired to latch electrically). \$\endgroup\$
    – DKNguyen
    Dec 22, 2020 at 21:57
  • \$\begingroup\$ There's no need to include your email address unless you're trying to receive more spam. \$\endgroup\$ Dec 22, 2020 at 22:01
  • \$\begingroup\$ Perhaps more crude-but-effective would be to detect an over current condition when the actuator stalls at the end stop; this may or may not be what you want to achieve. \$\endgroup\$
    – Frog
    Dec 22, 2020 at 22:35

1 Answer 1


Here's a circuit requiring only two standard electromagnetic relays.

enter image description here

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    \$\begingroup\$ It can be done with one DPDT relay and two SPDT limit switches if the relay coil and the motor can share the same DC power source. \$\endgroup\$
    – AnalogKid
    Dec 23, 2020 at 19:34
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    \$\begingroup\$ @AnalogKid, Yes, but I dropped my version of that, to avoid a retraction without a command, on resumption after a power failure. \$\endgroup\$
    – vu2nan
    Dec 24, 2020 at 10:42

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