I have a microphone picking up a certain frequency using a filter and I want to have this signal's amplitude converted somehow into a 4-20mA signal. I have a 24Vdc source I can use to create the 4-20mA signal but need some type of circuit to relate the two together.
Can anyone point me in the right direction to accomplish this or have any ideas?
Can anyone point me in the right direction to accomplish this or have any ideas?