Building an ignition and relay controller with optoisolators

Goal Create an interface relay system between a National Instrument (NI) Data Acquisition card and solenoid valves, ignition coils, camera triggering, and mass flow controller. The NI DAQ could have easily been replaced by an Arduino or other similar micro controller. The idea is to use optoisolators to isolate expensive controllers from any circuit fault or voltage spike on the load side. The end goal is to fully automating the fueling and ignition of the combustion chamber built in another project. [Read More]