We found this circuit in a 1998 publication. The circuit has controls for both frequency and signal strength. A lamp is used to monitor the signals. The supply is made with a voltage of 12 V.
This simple circuit has three electrodes that indicate the level using mercury in a small...
This circuit allows control of loads of up to 1 A with voltages from 3 to 15 V. The transistor must be...
The 50 kHz signal generated by this circuit is applied to a low impedance inductive transducer. A...