Most of the peripherals that interface with PC uses USB port . The computers power supply circuit of SMPS will be designed to maintain constant power to all computer parts only. however we connect external peripherals to PC that requires significantly large power, USB power shortage will occur result in a instability of PC.when too many devices are connected simultaneously, there is a possibility of power shortage. Therefore an external usb power amplifier or source has to be added to power the external devices.
Circuit Diagram of USB Power Booster : Click to enlarge
This circuit is of USB power booster designed to feed power to USB type A socket. To increase power to usb, we use an MOC3021 which is an opto-diac which triggers, BT 136 which is a triac which result in a available power boosting through transformer. We know that IC 7805 is a 5v voltage regulator which regulates the output to give constant voltage to usb peripherals.
Assemble the circuit on a common PCB and place inside a cabinet and enclose within the CPU cabinet
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1 comments:
I have implemented this circuit, it was quite easy to implement all the things, through this I am goign to get more benefit of power.
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