Adjustable Portable Power Supply

  Posted on May 25, 2016   ·   1 min read   ·   # comments   ·   #electrical 

Objective: Build a cheap, portable, variable DC power supply.

Motivation: It was finally time to get my hands on a variable power supply for my electronics projects. Previous projects mainly involved Arduino, which was able to supply 5V and 3.3V with ease. However, the need for a supply with higher voltage, current, and flexibility eventually arose, resulting in the birth of this ghetto (but functional) power supply.


  • Only DC voltages available
  • Max current is a function of input power and desired voltage (I=P/V)
  • Current limiting feature is non-existent, so must be careful to not let the genie out of circuits

Internals of the power supply.

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