Electronic controls for rugged machines including dc dc converters, electrohydraulics, valve drivers, solenoid drivers, fieldbus, CANopen, SAE J1939, CAN bus, control products, PID controllers, LVDT simulators, fan drive systems, soft shift controllers, valve controllers, analog I/O, engine, diesel engine, power generator, speed controls, machine control, motion control, automation, transient surge suppressors, industrial automation, industrial converters, power converters, proportional valve control, controllers, TC, RTD, engine temperature monitoring, pneumatic valve drivers, voltage doubler