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Easiest way to send a control pulse to a latching solenoid, for esp32/arduino

Discussion in 'Microcontrollers, Programming and IoT' started by laurentopia, Jul 26, 2018.

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  1. laurentopia


    Jul 26, 2018
    I am trying to replace the controller of the melnor quad valve timer with a wifi enabled thing.
    It uses a lathing solenoid that received 2 short pulses of 16V.
    What's the easiest way to produce such pulse and have the delivery controlled by the esp32?
    Thank you.
  2. Alec_t


    Jul 7, 2015
    Welcome to EP!
    How much current does the solenoid draw?
    How long is the 'short' pulse duration?
    What now provides the 16V?
    Are both pulses applied to the same input terminal of the solenoid?
    Does 'quad' mean there are 4 solenoids?
  3. laurentopia


    Jul 26, 2018
    I don't know, couldn't get a read on the amp meter, you can find the disassembly of the control unit here:
    the pulse is 30ms or so, it couldn't fit on the cheapo oscillo at 5ms
    I don't know, there is a ground wire to a solenoid terminal and the active wire to the other one
    yes, the melnor has 5 wires, 4 active and a ground to control them, oh and each solenoid can be activated at a separate time, I'm really looking for the easiest way for me, easiest to solder, absolutely least number components etc... because that's the first project I'm making and I'd like to make also the PCB.
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