Build a complete system for setting up and running any DCC locomotives. The Pi-SPROG 3 is a low cost DCC programmer-controller that connects directly to a Raspberry Pi low-cost computer, plugging directly onto the GPIO pins. Mounted directly on a Raspberry Pi computer, the Pi-SPROG models offer all the capabilities to run a DCC layout, and/or Program DCC decoders. Using a Raspberry Pi model 3B+ or 4B including WiFi you can easily build a fully featured DCC system with wireless throttles using Apple iPhones/iPods running the WiThrottle app or Android phones using the Engine Driver app. With essentially the same capabilities as the SPROG 3, the Pi-SPROG 3 is new hardware that can provide full programming functionality, and also 2.5A (per output) to run your layout.