In the figure we have a simple 5 V power supply obtained from an American documentation from the 90's. The integrated circuit must be equipped with a heat radiator.
Using a large inductance, this circuit was found in a Popular Electronics from the 90s. The...
This circuit is from Motorola technical documentation from the 70s, but it can be easily assembled...
This circuit was found in a 1990 English magazine. It is a system in which the audio signal from...