首页>
外国专利>
Wireless remote control device using ultrasound for electrical system, has twin channel ultrasound transmitter signal from which is transmitted to bistable relay via demodulators and schmitt triggers
Wireless remote control device using ultrasound for electrical system, has twin channel ultrasound transmitter signal from which is transmitted to bistable relay via demodulators and schmitt triggers
A twin channel ultrasound transmitter and receiver unit comprising two ultrasound receivers, demodulator and Schmitt triggers. The signals from schmitt triggers are fed to set and reset input of a flip-flop through conductors. The two outputs (O,/O) of the flip-flop are fed to the transistor pair via a serially connected resistor, and capacitor and to the transistor pair of bistable relay.
展开▼