Schematic Volt: 9v

Showing posts with label 9v. Show all posts

Saturday, October 25, 2014

Build 12V to 9V DC Converter

To get a more precise output voltage, replace zener diode Z1 with 10V and R1 with a 1Kilo ohm potentiometer. A Coolrib for Q1 is optional but highly recommended. You can replace Q1 for a more robust type to get more output amps depending on your requirements. Simple circuit to power your 9 volt cassette recorder and other stuff.

Parts List:

R1 = 560 ohm
C1 = 1000uF/40V, Electrolytic
C2 = 10uF/25V, Electrolytic
C3 = 330nF, Ceramic
Z1 = 9.1V, 1watt zener
Q1 = ECG184, NTE184

Tuesday, September 2, 2014

9V output switching power supply

By using the circuit you do not bother to roll up a transformer that is used to reduce voltage AC 220V to 7V ,9 V or 12V, etc. When using a large transformer we will find it hard to make transformator. by rolling hundreds or even thousands of times roll. But if you use this circuit a little just enough to roll trafo not to small, and its be relatively small.

Part List :
R1________________________________680K
R2________________________________47K
R3________________________________100R
R4________________________________1K
R5________________________________1R
D1,D2,D3,D4,D7,D8,D9,D10__________1N4007
D5,D6_____________________________1N4148
C1________________________________2u2F 400V
C2________________________________2n2
C3________________________________47uF 25V
C4________________________________10n
C5________________________________470uF / 16V
Q1________________________________MJE13003
Q2________________________________S8050

This is construction of transformer. For the first toll 220 times , then after that wrap right on top of L2 , and L3 on L2.