This traditional circuit generates a 200 Hz sinusoidal signal. The frequency depends on the capacitors and the transistor can be a BC548. We found this circuit in a 1979 documentation.
This is the project was found in a 1982 publication. As shown in the figure, these are two...
This simple circuit is designed to charger AA or AAA Nicad batteries. Current can be changed...
This realistic circuit has longer timings for green and red lights, with shorter timings for...