5V Stabilizer From 12-9V





Introduction: 5V Stabilizer From 12-9V

This is my first instructable, so i hope i help you. I am from slovak, so i don´t speak English very well so i sometimes use Google Translate. Sorry for errors...

Step 1: Parts What We Needed:

For this stabilizer we needed:
-7805 stabilizator
-200uF/25V electrolytic cap.
-10nF disk cap.
Some Wires
12V or 9V battery or Lab. Power Supply (for test)
Clear mind
So lets build it!

Step 2: 1st Filter - an 220uF Capacitor

Look at the pictures for better imagination.
  • Place the 220uF cap anywhere on breadboard.
  • Connect wire from negative side of cap to the ground rail. Negative side is usually marked with strip other color.
  • Connect another wire from positive side of cap to the power rail.
Continue with last build step!

Step 3: The 7805, 0.01uF Cap and Output ► Finishing With Building!

  • Place 7805 somewhere on board. Must be minimal 3 rows from 220u cap
  • Insert 10nF ( 0.01uF ) cap. One leg is connected to 3rd pin of 7805 and another to empty row.
  • Add wire from 1st pin of 7805 to power rail.
  • Add another wire from middle pin (2nd) to ground rail.
  • Add wire from second 0.01uF cap leg to the ground rail.
  • Place wire to ground rail. Left it unconnected. This make output ground. Place last wire to the 3rd pin of 7805 and left it in air unconnected too. This is 5V stabilized output.
Thats all for building! oh, lets test it!

Step 4: Testing and END

As you can see from first image, i use my laborytory DC power supply. Make the output from supply 12V and...
Connect probes from pwr supply to our stabilizer and...
ITS GIVING US 5VOLTS!!! (my multimeter is made in china...)

OK so thats all. This Instructable is short because its so simple. Later i try to make another with changable output and supplying from main voltage.
This is made for my web. Sorry, i can post link but all page is in Slovak...
I hope this is useful for you. If you asking me In what sh!t i use this?
Reason is simple - Arduino, MCU, CMOS, TTL and list of another...
So thats all, try it if you want it and keep calm while building!



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One extra suggestion: if you attach a heat sink (a large chunk of aluminium will do) then your device can handle extra current.

Great first project! Next time, describe what your stabilizer does in the introductory step. That's partly so the noobs can understand what the project will do (and if they might be able to use it), and also so a text search of the first step has good SEO.

Thanks! OK, its good tip, and i forgot schemtics too... Thanks for positive comment!

Schematics! I knew I was forgetting to mention something. Good eye.