Transistor Relay Latch

212

02:13:23

Allow 12-14 volt source to trigger relay and hold with 3.3 volt logic level signal.  Basically an OR logic gate with fancy LEDs and now a suppression diode to be kinder to the transistors.

510 ohm resistor and LED simulate the switched load.  3.3V supply and switch intended to be swapped for a microcontroller.

published 9 years ago

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