Using encoding and decoding IC multi-channel remote control switch circuit diagram

Published:2011/5/8 5:24:00 Author:Rebekka | Keyword: Multi-channel remote control switch | From:SeekIC

This article describes the NC multiple switch that composed of eight key remote control and receiver with eight relay. The device uses a high stability of dedicated wireless transceiver modules, and remote control encoder / decoder ICs with high security, remote control distance, performance, reliability and low static power consumption. You can use the remote control of the eight home appliances switch. CNC multi-channel remote control switch circuit is shown in figure 1. The remote control is composed of three integrated components. Circuit U1 (74LS148) is the 8-3 line of code integrated circuit, it can code the eight switch signals into BCD code output. U2 (VD5026) special code is the remote control integrated circuit. The IC has a total of 8-bit address code, 4-bit data code. This circuit uses the three data code only. The 8-bit address code can be combined freely. It means to connect the positive and negative power supply or the three encoding states composed of floating. There are 6561 kinds of different coding states to distinguish different devices. U3 (YG300U-S) is the wireless transmitter module.



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