This automatic brightness control that uses an LDR as a sensor, was found in American documentation from the 1980s. Resistors in series with LEDs depend on the desired current.
The setting of this power supply is only 0.1%. We found it in a 1969 US documentation. Transistors...
This circuit is based on a common cathode 7-segment display. The circuit is based on CMOS...
The existence of field effect transistors at the input of the integrated circuit (operational...