Hello Everyone. I am somewhat new to creating circuits like this but I do have limited experience and plenty of will power . I'm working on a project to create a delay circuit board (DCU as shown below)) that lights an LED for a variable rate of time depending on the input. Please see my schematic below as well as the description. To start, I need help determining if this can be done using a simple circuit board with resistors, capacitors, diodes, relay(s), perhaps a few NE555 timers, etc.? OR, Will I need a programmable I/O board like an Arduino? I know an Arduino board will work but I feel it's overkill for this project and I was also hoping the final product will be smaller than the Arduino board. Any help will be GREATLY appreciated. Thanks!!!