This circuit is from Ferranti documentation from 1967. The operational is of the time, but the configuration is valid for modern equivalent components, including higher current capacity.
This circuit drive an LED with constant current determined by the values of the resistors of 10...
The circuit shown in the figure has a more efficient action, with an attenuation of 12 dB per...
This circuit with current up to 100 mA according to the transformer was found in the Radio...