This circuit digitally counts input pulses. The circuit from a November 1970 Radio Electronics uses unijunction programmable transistors. Note the counted pulse duration.
This circuit for analog TV was found in an American documentation from the 90s. The circuit uses an...
The rectangular oscillator shown in the figure makes use of one of the four NAND ports of an...
This two-input limit detector was found in an American 1980s documentation. The circuit can be...