keypad controlled switch


Posted on Feb 4, 2014

This is a simplified version of the 4-Digit Keypad Controlled Switch. I have modified the design to reduce the complexity of the circuit - and the number of components required. As a result - the code is somewhat less secure. However, there should be lots of situations where it will still be adequate..


keypad controlled switch
Click here to download the full size of the above Circuit.




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