This small source for low consumption projects was found in an old national documentation. The transistor is for general use and the transformer has 50 to 100 mA of secondary current.
This sound effects circuit is based on 555 rectangular oscillating circuits but produces...
This is a Philips commercial circuit from the 1980s. The circuit must be powered by 28 V and its...
In the figure we have the simplest configuration with a voltage regulator transistor. The voltage...