Computer wireless receiver powered by RS232 signals of a serial port

摘要

A computer wireless receiver comprising a power source regulating device, a converting device, a decoder, a microprocessor, a memory and other devices for connecting to the COM PORT of a general computer or a portable computer, to receive and transfer data. The power source regulating device is used for rectifying, filtering and regulating the DSR and RTS RS232 signals as the power source of a system. The converting device is used for converting the received signal to signal levels of 0 V or 3 V, the transferred signal is converted to +4 V or -4 V signal levels. Thus, the receiver will not require the addition of another external power source.