This circuit was found in a 1980s Signetics documentation. The integrated circuit is from the era. The circuit enables coded matrix control via a toggle switch.
This circuit converts sinusoidal signals into squares and can be powered by voltages from 1.5 to 5...
This traditional version of timer was found in an old English publication. The relay must be of a...
This circuit for automotive use was found in American documentation from the 90s. The circuit uses...