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.
We found this easy start circuit in Electronics Now magazine from December 1993. The frequency is...
We found this circuit in an old American documentation. The circuit can be applied to modern...
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...