In the figure we have 3 oscillators with logic gates that can be triggered by external logic signals. The circuits were found in the Radio Electronics magazine of April 1987.
This circuit was found in the ON Semiconductor thyristor manual of the 1980s. As the drive is done by...
This simple preamplifier was published in Radio Electronics magazine in February 1958. The battery...
This circuit can use 20 to 100 mA relays with a general-purpose transistor such as the BC538. The...