Parts for an Automation of a Peco H0 Turntable with a Nema 17 stpper motor

This project is for a Peco H0 Turntable automated by a stepper motor and a drive by mean of belt and pulley.
A Rotatory Signals Collector is included in the design in order to power up the bridge track and to get two signals more for an steady led and a flashing led mointed in the bridge.
Included are all the files to get running this project.
Inspired in the fascinating thread at https://www.rmweb.co.uk/forums/topic/78578-dcc-controlled-peco-turntable-project-using-a-arduino-uno/page/32/
which make a lot of sense a complete read.