Patent ID: 6628535
Filing Date: 2003-09-30
Classification: G05F

Abstract:
An electric adapter system comprising: an adapter comprising:a casing, a first end connection devise adapted to connect to an external power source, a second end connection device comprising a first positive power terminal, a first negative power terminal and a plurality of first voltage selection terminals, and a circuit arranged inside the casing and connected between the first and second end connection devices, the circuit comprising: voltage level control means comprising a voltage conversion means for converting an input voltage received from the external power source via the first end connection device into an output voltage of a selected level to be transmitted to the second end connection device, and a feedback circuit connected between the first positive and negative terminals of the second end connection device and having a feedback signal line connected to a feedback terminal of the voltage conversion means, the feedback circuit comprising a plurality of voltage selection lines respectively connected to the first voltage selection terminals of the second end connection device, and a connector releasably engageable with the second end connection device, the connector comprising a housing defining a channel for receivingly engaging the second end connection device, a second positive power terminal, a second negative power terminal, second voltage selection terminals being arranged inside the channel for respectively engaging the first positive power terminal, the first negative power terminal and the first voltage selection terminals of the second end connection device, an output voltage selection line having a first end connected to the second negative power terminal and a second end selectively connected to one of the second voltage selection terminals, and an output member adapted to electrically engage an external power consuming device, the output member comprising a positive terminal and a negative terminal respectively connected to the second positive power terminal and the second negative power terminal, wherein when the connector mates the second end connection device, the selective connection of the second end of the output voltage selection line with different ones of the second voltage selection terminals changes a feedback signal applied to the voltage conversion means via the feedback signal line thereby changing voltage level of the output voltage of the voltage level control means that is transmitted to the second end connection device and the connector.