This unijunction transistor circuit is a frequency divider synchronized to 100 kHz. The circuit was found in a Radio Electronics from July 1968. The adjustment of R4 is important.
This circuit uses a PUT, a component not very common nowadays. Its purpose is to provide an...
We found this configuration in a documentation for radio amateurs from 1974. The circuit can be...
In the figure we have the simple way to obtain an integrator with an operational amplifier of type...