In my project I want to control multiple buttons with only one to two pins of microcontroller so I made shift register with D-flipflops when I give the desired signal like 1011 it shifts and after a while clock signal is continuous so my values didn't match to the desired value so I put Latch to store the values and put a transistor to stop clock pulse so my values gets stored in the latch the pulse which i give from Proteus is 2 Hz and in Arduino code I put delay so my desired logic worked...
controlling buttons with one pin
controlling buttons with one pin