For this project I was tasked with redesigning a warning light for the assembly line. We had in house production at this company and they needed a visual queue for when to move on to the next step in the process. I was given all the electrical hardware components for this project as it had been done previously but it broke after the company moved so I remade it. The components included an Arduino Mega, a shield, a rotary angle sensor (potentiometer), a 7 segment 4 digit display, a relay, a warning light, and a reed switch.

 

Unfortunately I no longer have access to the code I wrote however, the basic idea is that the potentiometer sets a timer that you can read on the display while the reed switch is disengaged. Once the reed switch shuts the value on the display, which was set by the potentiometer, is the time in seconds it takes before the warning light goes off. Because this project had been broken once before I did not want to take any chances with my design so I created a house for it. Additionally, I wanted all the components in one place and the warning light to be free so it could be placed where needed. The top of the box is removable in case one of the components needs to be replaced but it is not very easy to open by accident so people will not tamper with it.