Animation of various types greatly enhances the realism of any layout! In Arduino Projects, authors Paul and David Bradt show how inexpensive Arduino and Raspberry Pi microcontrollers can be used to control sound, lighting effects, and - with detectors - control crossing flashers and basic or complex signal systems. Combining these devices with Java Model Railroad Interface (JMRI), a free open-source software, further expands the capabilities of Arduinos. Inside, you'll find The basics of programming and using Arduino and Raspberry Pi microcontrollers. How to control crossing flashers, flickering torches, and other lighting effects. Methods of connecting Arduinos to software to detect trains and monitor train movements. Ways to implement a Centralized Traffic Control signal system including a simulated dispatcher's panel.