This circuit is from a 1980s Motorola documentation. The circuit can be made with modern equivalent components. The original circuit is for the 115 Vac (110 V) grid and has two settings.
This 2000 circuit can work with one of the many infrared remote-control transmitters described in this...
This circuit was obtained in a 1968 manual of General Electric. The components used are of the...
This circuit, obtained from old documentation, doubles the frequency of the pulses applied to the...