We found this circuit in a 1977 Timers Cookbook. The circuit uses common components to divide a 1 kHz signal by 2. The output has an amplitude of 2 Vpp.
This simple unijunction circuit is from a Radio Electronics from July 1963. It can be assembled with a...
Using 555 integrated circuits, this alarm circuit was found in a 90s American documentation. The signal...
This circuit with transistors was found in an old Japanese publication, translation of an American...