I have built a LED circuit that cycles 4 led’s with the push of a button. I am using a CD4017 and triggering it with a LM555. When I trigger the LM555 (pin 2) with a pushbutton the output is sent to the CLK of the CD4017. This causes it to advance one light. I have built 24 of these and they are located throughout the shop. This works fairly well so I took it a step further. I made a Master box that sits in the office. It has 24 sets of 4 LED’s that represent what is displayed on the small boxes. From each small box I send the same signal that I use to trigger the first CD4017 and have it trigger a duplicate CD4017 circuit. The lights will change at the same time . The problem that I am having is that the master box LED’s will change sometimes by themselves. I must be getting a stray signal from somewhere. Can I put a filter in the circuit? Any suggestions?