“In this era everything is getting smaller but bench power supplies can get big and in no way are they portable so in this instructable I am going to show you how you can make a power supply that is probably smaller than you phone and you can carry it anywhere you go.You could either use the internal batteries or even connect it to an external power source (up to 100 that’s what i tried) for more power. The on board voltmeter makes the job even easier and the 4 different fixed voltages make the operation a breeze. So lets get started.”