This 1 kHz oscillator uses a Norton LM3900 operating system. The frequency depends on C1 and R1 and can be changed.
The circuits below were found in amarican publication of the year 1958. The transistors are...
This circuit produces signals that depend on the input control voltage. It is a Voltage Controlled...
The bipolar transistors may be BD136 and BD136 and FET of any type for 1 A current at least. The...