This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.
This circuit is from a cookbook to timers. The circuit is triggered by an external signal and,...
This is a general purpose pramplifier launched in Brazil by Philips in the years 70. The BC549 is...
This circuit turns on your car's backlight when a vehicle coming from behind gets too close to it...