Jan 14, 2024 · Hi I have made a voltage detector circuit using NE555. This gives the right cut in and cut-out voltage (12/10V) Pin 3 gives -5V when 12Volts is reached. I need the output to …

Dec 17, 2024 · If yes, this can be done either with a standard relay and an electronic latch circuit, or a pulse-forming circuit and a latching relay. If you want to use a latching relay, then it must …

Dec 17, 2024 · Here's the LTspice sim of a dual-coil latching relay with one CMOS Schmitt-trigger hex-inverter package to do the timing and signal inversion with two BJT drivers: It gives clean …

Apr 8, 2022 · A bipolar junction transistor (bjt) with a collector current of 70mA driving the relay would need a base current of about 7mA to ensure it is switched on fully.

Jun 27, 2023 · i made a simple circuit that uses a comparator to drive a relay Actually, I think your circuit is more complicated than it needs to be.

Mar 16, 2021 · I've just found the following circuit on a board I'm repairing. There are 3 N channel mosfets and 1 P channel mosfets driving the relay coil. The signal is provided by two 5V micro …

Dec 17, 2024 · If V (in) changes state (logic level), and the driver circuit is powered on, the relay coil will trigger. In addition, if you delay V (in) at startup, say...500ms, you will see a current …

Feb 6, 2020 · hi h, I use the 5V version with more relays/channels on the PCB. All that jumper does is use Vcc , 3.3v in your case to power the relay coils, which are 3V on your PCB and the …

Aug 12, 2015 · Sloppy work, and it makes it very difficult to determine if the circuit is correct. But the circuit is based on running a small direct current through the water, and this will lead to …

Jun 22, 2014 · Hi all, I am using a 2n2222 transistor for switching a 5V 185mA 27ohms relay. I calculated that the base resistor should be 270ohms. Why am I getting approximately 3.2V at …