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Switched my design to a NPN BJT and a PNP MOSFET. Works fine now. With the MOSFET there is only a mV drop as opposed to several volts. When I originally designed the circuit I was using a NPN BJT into a darlington PNP. The calculation was 145 mA collector of darlington. When it was actually...
I am having difficulty driving dual coil relays. I have tried several techniques with no consistent switch. I had a switch working with just a simple PNP BJT, resistor, and diodes but the BJT's were dying out after switching. The other problem I seem to be having is that the voltage of the...
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