12v to 5v converter

Those who want to have the power supply circuit for use in experiments such as logic circuit and/or the Microprocessor types that use voltage size 5 volt And the amount of current consumption very much. This circuit will respond your needs did well
- Due to this circuit is very simple with the IC-LM323K (or LM123 or LM223) only one. But the can supply 5V fixed output voltage, and can be connected load current up to 3 Amp.

How it works.

In the circuit is made up of only a few pieces of equipment, such as
-The transformer acts to reduce the voltage from AC 220V to AC 9V.
-The bridge diode of size 4 Amp, is converted AC voltage into a DC voltage. Which we have C1 is the current filter smoothly
-Then IC1-LM323K is used to
It is used to maintain a constant voltage 5V. In addition, the internal circuit overload protection. Due to Short Circuit output and the thermal protection system over determine as well.
- C2 is noise frequency filter.
- C3 is the output filter.

The parts
IC1_________________LM323K or LM323T (To-220) THREE-TERMINAL 3A-5V POSITIVE VOLTAGE REGULATORS
C1__________________1000uF 16V Electrolytic capacitor
C2__________________0.1uF 63V Polyester Capacitor
C3__________________470uF 16V Electrolytic capacitor
T1__________________Transformer out 9V at 3A.
BD1_________________Bridge diode 4A 200V.

Note: Please see datasheet of LM323Kbefore make this project.

The other way of 5V 3A power supply for digital circuit!

12V to 5V 3A DC converter step down Regulator

Today I has 12V to 5V 3A DC converter step down Regulator circuit come to deposit. In sometimes friends have power supply 12V 3A , but want Voltage 5V 3A for digital Circuit. This circuit can meet the demand of friends get , by it uses normal electronic part and have 7805 integrated circuits perform to control Voltage 5V Regulate alone it gives current get just 1A. then must have an assistant is transistor MJ2955 perform enlarge current tallly go up be 3A besides. When be born over load or shot circuit as a result still have LED1 bright warn with. And still make Q2 – BD140 work cause Q3 – MJ2955 stop work with. The circuit then safe have no a problem friends may like this circuit. Because the equipment seeks easy , build not difficult too yes.