The current that runs through the circuit oscillates between 10 mA to 50 mA on a load with a value of 50R. The circuit can be powered by two 9 V batteries or from a single but stable power supply. The generator can be adjusted with the use of an oscilloscope. In this scenario, the presence of the waveform is being modified by the trimmer TR1 until the waveform produces less distortion. If the waveform is not visible on the oscilloscope, the resistor can be replaced with 47R in connection with the loudspeaker and the output. The loudspeaker is rated with 8 ohms at 0.5 W. The trimmer is adjusted until hearing the presence of oscillation in the loudspeaker.