This simple 12 V power supply with current up to 2 A was found in a Popular Electronics from the 90s. The zener diode is 14 V and transistor Q2 can be a TIP42.
The integrated circuit used in this 2002 project is not very common. It is powered directly by the...
We found this circuit in a 1972 RCA technical documentation. The comparator can be any type and C1...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...