This flasher was found in an 80's Electronic Engineering but can be easily implemented with modern general purpose transistors. The frequency depends on C1.
This circuit, also suggested by Texas Instruments, uses a photo diode in the reception and a field...
The output stage of this amplifier can operate at high voltage. The transistor must be a high...
We found this circuit in a 2002 documentation. It allows you to turn off the devices connected to a set of...