The TOTALLY AWESOME DC-DC Variable Power Supply Circuit
Customize your Output

This listing is for a really neat variable DC-DC power supply.  The output voltage is determined by a series of DIP switches.  I've made a demonstration video that you can view above.  The base voltage (lowest output voltage) is 1.5v.  The DIP switches are labelled 0.5v, 1v, 2v, 4v, 8v, 16v.  When you turn any of them off, that value will be added to the 1.5v base.  If I have all of my switches in the ON position, by default the output will be 1.5v.  If I then turn off the 2v switch, the output will be 3.5v (1.5v base + 2v = 3.5v).  It is a matter of addition.  If all switches are off, and you have 36v at the input, the output will be (1.5v base + 0.5v + 1v + 2v + 4v + 8v + 16v = 33v).  A 33v output is the maximum that you can achieve.  If you have 12v at the input, the maximum output will be roughly 12v.  It is accurate and easy to use.  As well, if you find that the output voltage needs tuning, you can do a calibration using the on board variable resistor.  This module will come to you tuned.  Please see the specifications below.  If you have any questions, please don't hesitate to ask!  WATCH THE VIDEO FOR A DEMONSTRATION! 

Pinout:
IN+ = Input Voltage
IN- = Input Ground
OUT+ = Output Voltage
OUT- = Output Ground

Specifications:
Input Voltage: 4v - 36v Max (DC Only)
Output Voltage: 1.50v - 33v  
Source Current = 3A Max Surge - Up to 2A Nominal
Size: 58mm(L) x 35mm(W) x 13mm(H)