I wonder if you could help me.
For testing a prototype a require a simple circuit board designed and made.
a board that can be powered by 9v to 25v.
that it creates an oscillating current.
Has a knob on that can adjust no oscillations / frequency from between 1Hz to 150KHz to 150
Ideally the board will have two wires that the power is connected to and two that the oscillating current is created to.
I require no box.
I only require only one of this.
I invite offers to make this for me.
I found this which may help: http://www.electronics-lab.com/projects/oscillators_timers/007/index.html