I have a BOYA BY-M1 lavalier mic which has its own battery unit. However, I want to attempt to supply power through the 4 pole TRRS jack itself for a project. I had attempted solutions for similar topics but to no success.
Referring to the picture, I have confirmed that point 1 & 2 are for the sound signal, 3 is the ground and 4 is V+(supply). I attempted to connect a 1.5V AA to points 3 and 4 but it didn't work, I have also attempted to connect a resistor across point 3 and 4 before connecting the battery for a voltage drop but that didn't work as well. Base on me probing around in the battery unit, I can confirm that voltage is being supplied (1.5V).
So am I missing something here? I don't think supplying power should be that complicated but have been stuck here for a while, appreciate if anyone can point me in the right direction. Thanks