Hoyong Kim

US Patent:

20040173689, Sep 9, 2004

Filed:

Mar 3, 2003

Appl. No.:

10/377550

Inventors:

Hoyong Kim - Laguna Hills CA, US

International Classification:

G05D023/00

US Classification:

236/047000

Abstract:

A novel centralized power on/off control system for motel is comprised of, including but not limited to; 1) a PLC (Power Line Carrier) or RF (Radio Frequency) modem connected to a personal computer on the front desk of the motel, 2) PLC or RF modems in each rooms, 3) power relays connected to the PLC or RF modems in each room. A 340 KHz “ON” signal is transmitted from the main personal computer to the PLC modem installed in each room utilizing 60 Hz 110V power line as the carrier. For RF modem 900 MHz/2.4 GHz radio frequency is utilized for “ON” signal.