12vdc to 9vdc circuit | Electronic Schematic Diagram https://electronicscheme.net Schematic Diagram & PCB Design Mon, 29 Sep 2014 08:27:43 +0000 en-US hourly 1 https://i0.wp.com/electronicscheme.net/wp-content/uploads/2017/05/cropped-transparent_text_effect.png?fit=32%2C32&ssl=1 12vdc to 9vdc circuit | Electronic Schematic Diagram https://electronicscheme.net 32 32 129969089 12VDC to 9VDC Converter https://electronicscheme.net/12vdc-to-9vdc-converter/?utm_source=rss&utm_medium=rss&utm_campaign=12vdc-to-9vdc-converter https://electronicscheme.net/12vdc-to-9vdc-converter/#comments Mon, 28 Dec 2009 20:25:56 +0000 http://electronicscheme.net/?p=357 This is a 12VDC to 9VDC converter circuit. You may use this DC to DC stepdown converter circuit if you have fixed 12V power supply […]

The post 12VDC to 9VDC Converter first appeared on Electronic Schematic Diagram.]]> This is a 12VDC to 9VDC converter circuit. You may use this DC to DC stepdown converter circuit if you have fixed 12V power supply / battery, but you need 9V power supply for your electronic devices.

Scheme Diagram:

12VDC to 9VDC Converter circuit diagram

Components List:

R1________ 560 ohm, resistor
C1________ 1000uF/16V, Electrolytic capacitor
C2________ 100uF/16V, Electrolytic capacitor
C3________ 330nF, Ceramic capacitor
Z1________ 9.1V, 0.4watt zener diode
Q1________ ECG184, NTE184 NPN Transistor


Circuit Notes:

To get a more precise output voltage, replace zener diode Z1 with 10V and R1 with a 1 Kilo ohm potentiometer.
A Coolrib / heatsink for Q1 is optional but recommended for better transformer performance. Simple circuit to power your 9 volt cassette recorder and other stuff.

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