This circuit was obtained in a 1980s publication, but it can be easily assembled today, as all components are common. The transformer is 12 + 12 V with at least 1 A and the diodes 1N4002.
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...