Using the 723 integrated circuit, this circuit was found in an article on power supplies in the August 1971 Radio Electronics magazine. The transistor may be the BD136 on a heatsink.
This memory flip-flop must be powered by 5V voltage. The circuit stores 1 bit. ...
Originally designed for use in an FM receiver, this 1990 circuit can be adapted for other types of...
This circuit, found in ancient US documentation, allows you to switch the antenna from the...