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Creative Commons License
snapVCC by Mahesh Venkitachalam is licensed under a Creative Commons Attribution 4.0 International License.


snapVCC is a highly portable and convenient power supply for your electronics projects. It’s designed to snap right on to a 9 V battery and give you 3.3 V or 5 V power wherever you need it.


  • TI TPS560200 buck converter for efficient regulation of battery voltage.
  • LED indication.
  • Reverse polarity protection.
  • Switch for setting output voltage to 3.3 V or 5 V
  • Battery cap design, snaps on the top of battery.
  • A convenient trace cut option for the power LED to conserve battery
  • 90 degree output headers for a flat profile.


  • DIY Electronics projects.
  • Prototyping products.
  • Field testing electronics due to portability.

Electrical characteristics

Characteristics Values
Input Voltage Range 4.7 V to 17 V
Output Voltage Range Switchable between 3.3 V and 5 V
Output current 500 mA continuous Current
Reverse polarity protection P-MOSFET


25.9 mm x 17.3 mm x 10.2 mm