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Description: This is the basic L7812 voltage regulator, a three-terminal positive regulator with a 12V fixed output voltage. This fixed regulator provides a local regulation, internal current limiting, thermal shut-down control, and safe area protection for your project. Each one of these voltage regulators can output a max current of 1.5A.


  • Output Voltage: 12V
  • Output Current: 1.5A
  • Thermal Overload Protection
  • Short Circuit Protection
  • Output Transition SOA Protection


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Customer Comments

  • Your link to the tutorial doesn’t work. Perhaps because it links to an “internal” Sparkfun page.

  • NL / about 3 years ago * / 1

    Is there a way to have 12 volts DC, directly from an AC line (110 V), via a regulator like this one, and without having to use an ac adapter ? (I want to use a fio or pro mini to control a light bulb in my house and I don’t have enough space for an AC adapter) Thanks !

    • I used an RAC05 for a 12VAC-5VDC straight from the wall outlet. I did not use a 12VDC unit, but you can check the links below. Its through hole and can be mounted on a PCB with your project. I purchased mine from www.digikey.com.

      Maybe sparkfun can look into carrying these units, since they are really handy to have for any control system in the home.

      Digikey site: http://www.digikey.com/product-search/en?mpart=RAC05-12SC&vendor=945

      Datasheet: http://www.recom-international.com/pdf/Powerline-AC-DC/RAC05-S_DC.pdf

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