12volt’u 9volt’a düşüren basit bir devre.
Parça Listesi :
R1 = 560 ohm
C1 = 1000uF/40V, Electrolytic
C2 = 10uF/25V, Electrolytic
C3 = 330nF, Ceramic
Z1 = 9.1V, 1watt zener
Q1 = ECG184, NTE184
kaynak : http://www.uoguelph.ca/~antoon/circ/car912.htm