This circuit was obtained from the September 1977 issue of Radio Electronics magazine. The circuit is based entirely on transistors and two SCRs. The power supply with the inclusion of a battery is given.
The circuit shown in the figure uses a programmable unijunction transistor (PUT) of the BRY39 type...
This circuit generates a 5V rectangular signal. The circuit is suitable for calibrating TTL...
This configuration, explored in other applications of this section and website, was found in a 90s...