High reliability remote control circuit composed of the monolithic wireless transceiver integrated chip NRF401

Published:2011/7/31 22:17:00 Author:Christina | Keyword: High reliability, remote control, monolithic, wireless transceiver, integrated chip | From:SeekIC

The NRF401 is designed as one kind of digital frequency band 433MHz monolithic wireless transceiver integrated chip which is produced by the Nordic company. This IC has the functions of high-frequency transmitter, high-frequency receiver, PLL synthesizer, FSK modulation, FSK demodulator and multi-channel switch functions. The circuit is as shown in figure 2. This circuit is the transmitter circuit and the receivier circuit. The SCM IC2 PIC16C57 controls the sending & receiving state and the decoding & coding of the NRF401. When you press the button, the IC2 receives the low level signal, and the pin of IC2 outputs the high level to the pin of IC1 to make the NRF401 get into the launch state. At the same time, this device chooses the different crystals randomly, and it makes the transmitting frequency jump between the six frequency points 432.84MHz, 433.25MHz, 433.92MHz, 434.33MHz, 435.01MHz, 435.42MHz.



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