This circuit makes use of a specific 80's component and was found in an American manual of the time. A matrix keyboard allows you to select one of several music programs.
The circuit shown in the figure has elements for maximum gain at maximum speed. By setting the...
We found this circuit in English documentation for PCs from 1996. The ZN448 is a very uncommon...
This is a simulation of a Relaxation Oscillator using a programmable unijunction transistor (PUT). The...