This simple Morse Code oscillator was found in a 1980s American documentation. The power supply should be powered with 5V and the integrated can be the 7400.
The quiescent current of the small transmitter is around 20 mA. The transmission frequency depends on...
This circuit was suggested by Philips in 1967 documentation. The circuit receives modulated light and has...
This circuit has an interesting application. If a device with the selector switch in the 110 V...