We found this circuit in a Hands-On Electronics from the 90s. The circuit must be connected to an external amplifier. Frequency control is capacitive, using an antenna for this purpose
This circuit was found in an old manual and can be applied to any operational amplifier. The power...
This circuit uses a JFET at the input to increase the impedance. The circuit has a gain voltage...
An excellent low frequency sine signal is produced by this oscillator. The frequency is determined by the...