# biofeedback monitor

#### tracecom

Joined Apr 16, 2010
3,944

#### tracecom

Joined Apr 16, 2010
3,944
May I ask why you gotten interested in this. And what you want to get out of it.
I am learning relaxation techniques and want to add this tool.

#### tracecom

Joined Apr 16, 2010
3,944
No help available?

#### Wendy

Joined Mar 24, 2008
22,582
You specified a working tested design. Such stipulations kinda limit the help available. People may know how to do something, but having never done it, decline to answer.

Think very low constant current source, with an voltmeter measuring the drop (a basic accurate ohm meter), followed by a VCO.