2018-06-14 Update: DIY Eight-channel wireless remote control with AT89C2051

Today, were going to make eight-way wireless remote control by using AT89C2051. I used a pair of 315MHZ receiver for the wireless module. First lets look at the schematic.Receiving part:Transmitting part:The VD8 in the pic is the reset indicating light, it will be on when you press the reset button, which means the the reset button is in good condition, if it is off means the reset button is bad.You must add resistance between p1.0 and p1.1 in AT89C2051, and here is the soldering pic...
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