Hi all,
I have a latching relay, there is a constant positive supply to the + side of the coil, and normally the negatice side is floating, I want to pull down the negative side to switch off the relay can I do this directly with a pin of a MCU (AVR / PIC) that can sink tens of mA?
Because I was unsure I tried using a BCR148 with the MCU feeding the base and the emitter to ground, but this does not appear to work?
I know your probably laughing but any help will be great.....
I have a latching relay, there is a constant positive supply to the + side of the coil, and normally the negatice side is floating, I want to pull down the negative side to switch off the relay can I do this directly with a pin of a MCU (AVR / PIC) that can sink tens of mA?
Because I was unsure I tried using a BCR148 with the MCU feeding the base and the emitter to ground, but this does not appear to work?
I know your probably laughing but any help will be great.....