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:
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.
This is the circuit diagram of power amplifier 45W using power uPC 1230 as the…
The Horn Circuit This is a basic circuit of car horn and lamp flasher that…
This is the circuit diagram of drinking water alarm based a small water sensor by…
Here is the 200W MOSFET amplifier powered based on four piece of IRFP250N, they are…
This is the 300W RMS stereo power amplifier circuit project. This amplifier is based four…
This is an active stereo tone control circuit using very well known op-amp IC of…
View Comments
thanks for the cct.
What volt is c3
it should be 16V and above...
hi,, can you make diagram for 36vdc to 12vdc?? thanks..