Found in an Electronic Design of 1964 this circuit has a control for the frequency and another for the active cycle the signal. The bipolar transistor can be a general-purpose type.
This circuit was found in the Spanish magazine No longer in existence, Mundo Electrónico, in a...
This circuit that has a response from 10 Hz to 700 kHz was found in Philips documentation from 1968. Dual...
This simple sweep generator circuit has been found in older documentation, but can still be easily...