Displaying Temperatures In An Intercooler

摘要

I have built the High-Temperature Digital Thermometer (from Silicon Chip's "Performance Electronics For Cars") to use on my modified car. I am trying to use it to display the coolant temperature and operate a pump and fans on an air-to-water intercooler set-up I am building. I adjusted the kit to the specifications in the instructions and it reads temperatures fine but I cannot get the relay to switch properly.