DC / DC converter for USB connections

This converter is inexpensive and quick to build, it is nothing more than a DC / DC converter, its use is for USB sockets or any other device that needs a stabilized voltage 5 Volts and a maximum current of 2 amps.

With this power converter, you insert a voltage from 6 Volts to 24 Volts and have a regulated output of 5 Volts per 2 Amperes. That is, you can use a car or motorcycle battery or your vehicle's cigarette lighter as power, and you will have an outlet to charge your cell phone, camera, etc.

DC / DC converter for USB jacks

The circuit is very simple, and you may have already seen it in some project here on the site, the circuit uses only five components, a 7805 positive voltage regulator integrated circuit, a TIP42 transistor, a 5 Ohm resistor and two disk capacitors or polyester, one of .33 and the other of .1 or 330 and 100 nF.

The capacitors are filters and accompany the voltage regulator 7805. This converter works perfectly, as long as you respect a number of devices connected to it. The creator himself says it's ideal for a small USB hub that does not have large, connected devices.

DC / DC converter for USB connections Circuit

Above the electronic circuit diagram and the integrated circuit board of the converter, but because the circuit is compact, one can build the circuit without printed circuit board, ie using other ways of construction.

If you need more current, you will need to modify the circuit by adding a larger heat sink and even a more powerful transistor. The voltage regulator can be maintained since it only does the job of regulating the voltage at the base of the transistor and only a small current passes through it, requiring neither the installation of a heatsink on the 7805.

According to the creator of the project, any regulator integrated circuit of the line 78xx, 5, 6, 8 or 9 Volts can be used from a source of 12Volts.

The TIP42 was left with enough spacing around it to fit the small heat sink. The R1 resistor was calculated to maintain the maximum current through the TIP42, ie, about 2 Amperes.