We are not sure if this is working correctly. With the serial monitor, the temperature only went up one degree when I placed my fingers on it. We don't know exactly how sensitive it is supposed to be, so placing our fingers on it doesn't seem to make it light more than one LED. We unplugged and replugged in all of the components, switched shift registers, and temperature sensors and made two different circuit boards. This is the best we could get out of it.