Tuesday, April 13, 2010

USB Power Booster

Nowadays We always connect our external peripherals to PC by USB port. Every device requires a specific amount of power for its proper working. Since a PC SMPS can supply only a limited power to the connected devices. When too many power devices are connected to USB simultaneously, there will be occur a power shortage. The circuit shown in the figure is designed for type A USB socket. The circuit uses an  MOC3021 which is an opto-diac which triggers BT136 - TRIAC1 resulting a power availability through transformer. IC 7805 is a 5v voltage regulator which regulates the output from the bridge rectifier to give constant power supply to USB ports.



You can assemble the USB power booster circuit on a General purpose PCB with a suitable cabinet.Download the image and zoom to get the circuit details.





                                                      
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2 comments:

power supply said...

This circuit is designed to add more power to a line of USB cable. The switching regulator is more suited to this circuit because of the high efficiency and compact size, and now most digital circuits are immune to the ripple voltage developed during switching.

ashmit said...

its nice instructions to make usb power booster,i found it useful.i will try to make it.

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