This circuit offers a variety of Buck DC to DC converters. Because as circuit increase voltage as the usb 5v to 12v dc-dc step-up converter. This circuit is called Boost converter circuit. Read more
Make 5V low dropout regulator circuit using transistor and LED lowest voltage input is 6V so across it is 1V only, make output is 5V 0.5A Read more
Learn how to increase/boost up current of 7805 (or 78xx) regulators with helping the 2N3055 and others transistors. Read more
Learning experiments with simple constant current circuit using transistors, a few plain parts, so helpful, especially Ni-HM battery charger. Read more
Here is 3.7V to 5V boost converter or step up switching circuit using MC34063 and a few parts,1N5819,100uH. For 200mA-300mA of load current. Read more