Hi, everyone! I'm designing a 3V Relay Short Circuit Protection to protect 2*AA Parallel Batteries Holder. The goal is to light a LED when someone makes a shortcircuit in it. Since the the relay is rated at 3V, I've noticed that sometimes the input Signal(3V DC) doesn't triggered the relay coil. It makes a magnetic sound trying to close it, but it doesn't close the contact. Maybe it's the coil sensitivity or due to internal resistance that makes the short-circuit input signal to drop around(2.8-2.9V DC). I'd like to hear from you alternatives to make it work correctly. I've looked up some tips to use npn transistors, but have no clue how to connect it. What should I do? Would it be better to step-up the input signal using transistors?
I've attached the circuit image and the YouTube tutorial that I followed the instructions:
I've attached the circuit image and the YouTube tutorial that I followed the instructions:
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