I thought about using solar power but unfortunately the installation will take place in a space without too much light. Also, the object won't be moving enough to generate any power. I don't know what it is but I really like idea of a squelch circuit, I will investigate.
I'm working on an installation where I have to leave a wireless microphone transmitter on for two or three days. The transmitter works with a 9V battery. I wanted to ask if anyone knows if there is a way of changing the battery system of the transmitter with something that can last longer so i don't have to change the batteries every day ?