Holding HT12D pin

Discussion in 'The Projects Forum' started by André Ferrato 1, Dec 18, 2015.

  1. André Ferrato 1

    Thread Starter New Member

    Jul 31, 2015
    Hello, i am using a simple 433Mhz TX-RX system with HT12E and HT12D to enable a relay coil to close the circuit on another part of my house, but to ensure that the battery of the transmitter isn't drained all time, i need a circuit that holds the pin of the HT12D high to keep enabling the coil even if the transmitter only transmits at a brief moment, is that possible? Or i could use another options ? I don't know a thing about digital electronics, but i think the solution is there. Thanks.
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    you need a latch usually make up of a "JK flip flop".