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I am working with Packard C230C contactor to develop own EVSE. For a simple start i just want to toggle contactor using Arduino. OpenEVSE is already doing it. Just want to know how do they do it and some circuit explanation.

Reference : OpenEVSE Setup enter image description here

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  • the gray wires control the relay .... research how to control a relay with an Arduino .... also research how relays work ..... btw: the link that you posted is bogus Commented Jun 12, 2018 at 6:49
  • I get grey wire controls contactor. But the voltage at that wire is around 120v while toggling a contactor state. generally relay is also +5v so question is how do you control 120~220v relay from arduino Commented Jun 12, 2018 at 7:54
  • @SurajJorwekar using a second relay that is controllable by 5V, that one doesn't need to switch a lot of power so can be a cheap one. Commented Jun 12, 2018 at 8:07
  • I use this module, controlled by 3.3 V pin of esp8266, powered with 5V to switch 10A AC wiki.seeedstudio.com/Grove-SPDT_Relay_30A Commented Jun 12, 2018 at 12:14

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Get solid state relays that have a operating voltage of 5V and can switch Mains AC

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