I have a microphone which needs to be powered by a socket with "Plug- In Power".
My tape recorder does not provide "Plug-In Power" so I want to build a simple inline power unit to drive the microphone through its usual plug.
In the following PDF (bottom of page 1) is a circuit to do this.
The circuit is dead simple but I am not too hot on electronics so I would like to ask you what value of capacitor should I use?
BTW do you think 2.5v is high enough?