This low frequency circuit was found in documentation from the 1980s. The values of R and C determine the frequency. Inverters can also be designed with logic gates.
This circuit can be used as a basis for a power control where the comparator directly excites the...
This circuit adds a beep to turn on with car flashers that do not have this feature. A 47 ohm to...
This traditional configuration from a 1980 publication shows how a reed relay is used to control a 240...