Thanks guys..
I'm asking because I'm working on a new project, in which (I think there has been one done before) you can hear emf through the use of pickups. the current but I want to make a few modifications to it in order to provide a wider market.
I'm looking to (using the Arduino) incorporate a screen where the signal from the Dual pickups (stereo) will show exactly where the signal is coming from, ie if the left pickup is generating more than the right the screen will show that its originating from the left.. etc. when both are roughly the same then the source is in the center.. this would mainly be for electricians, who can exactly pinpoint wires with the device.. they would know exactly where the wire is. at the moment I believe they have a machine that just beeps to tell them the general location of the wires.. not sure though
To do this, I would need to increase the voltage coming from the pickups, so that the Arduino can pick it up with reasonable accuracy, so am looking to amplify the signal slightly. 5X or 10X, not sure as yet.. need to test.
anyway, I am also looking to add extra features to it also.
so my question was based on increasing the voltage. in order to work with more easily used figures for the Arduino. etc..
cheers
keith