12 to 9 volt Convertor Circuit with amp booster

Convertor 12V to 9V Circuit1

Today we have convertor circuit for supply 12 to 9 volt.

Thus as picture right side

Electrictronic parts list:
R1 = 560 ohms
C1 = 1000uF/40V, electrolyte
10uF/25V = C2, electrolyte
C3 = 330nF, ceramic
Z1 = 9.1V, ZENER 1watt
Q1 = ECG184, NTE184

Remark:

Convertor 12V to 9V Circuit2

In order to obtain a more accurate output voltage, replace the Zener diode Z1 with 10V and R1 with a potentiometer 1Kilo ohms. Coolrib for Q1 is optional, but recommended. You can replace the Q1 type to get more efficient production amplifiers depending on your requirements. Simple circuit to power your 9 volt cassette recorder and other stuff.