model railroad electronics

Skip to content
  • Overview
    • Background
    • Toyama Light Rail, the prototype
    • Toyama Light Rail, the models
    • Track plan
  • Throttles
    • Background
    • Motor controller hardware
    • Motor controller software
  • Throttles — Implementation
    • Overview
      • Throttle System Units
        • Throttle Unit
        • Controller Unit
        • Power Monitor Unit
  • Switch Machine Controllers
    • Background
    • Switch machines
    • Hardware
      • Update
      • Another update
    • Schematics
    • Driver Module printed circuit boards
    • Software
    • Special note: I2C over servo wire
  • Block switching
    • Background
    • What about those turnouts?
    • Switching a single block
    • Switching multiple blocks
    • Hardware
      • Block addressing logic
      • Relay decoder/driver
      • Relay module
      • Connection to control processor
    • Software
    • Timing requirement for relays
  • Track Sensors
    • Background
    • Sensors
    • Controllers and nodes
      • Sensor nodes
      • Sensor controllers
    • Sensor network
    • Software
      • Sensor nodes
      • Sensor controller
  • Trackside Signals
    • Background
    • Color-Light Signals
    • Obstruction-Warning Signals
  • Notes on Interfaces
    • Daisy-chaining SPI devices
    • I2C over servo cable
    • UDP network communications
  • Railroad Turntable
    • Background
    • Modeling the turntable
    • Trackage
    • Drive mechanism
    • Position indexing
  • Turntable Calculations
    • Background
    • Calculations
    • Python code
  • Microstepping a stepper motor
  • Train Speedometer — Basics
    • Background
    • What you need
      • Scale factor
      • Units of speed
      • Sensors
      • Sensor separation
      • Elapsed time between sensor detections
    • Basics of operation
    • Calculating scale speed
  • Train Speedometer — Implementation
    • Background
    • Hardware
    • Setup
    • Operating the speedometer
      • Detect a train
      • Compute the train’s speed
      • Display the speed
    • Testing the speedometer
  • T-TRAK Module Wiring
  • (archive) Arduino Day 2017 in Rockville, Maryland
  • (archive) Switch Machine Controllers – version 1
  • Overview
    • Background
    • Toyama Light Rail, the prototype
    • Toyama Light Rail, the models
    • Track plan
  • Throttles
    • Background
    • Motor controller hardware
    • Motor controller software
  • Throttles — Implementation
    • Overview
      • Throttle System Units
        • Throttle Unit
        • Controller Unit
        • Power Monitor Unit
  • Switch Machine Controllers
    • Background
    • Switch machines
    • Hardware
      • Update
      • Another update
    • Schematics
    • Driver Module printed circuit boards
    • Software
    • Special note: I2C over servo wire
  • Block switching
    • Background
    • What about those turnouts?
    • Switching a single block
    • Switching multiple blocks
    • Hardware
      • Block addressing logic
      • Relay decoder/driver
      • Relay module
      • Connection to control processor
    • Software
    • Timing requirement for relays
  • Track Sensors
    • Background
    • Sensors
    • Controllers and nodes
      • Sensor nodes
      • Sensor controllers
    • Sensor network
    • Software
      • Sensor nodes
      • Sensor controller
  • Trackside Signals
    • Background
    • Color-Light Signals
    • Obstruction-Warning Signals
  • Notes on Interfaces
    • Daisy-chaining SPI devices
    • I2C over servo cable
    • UDP network communications
  • Railroad Turntable
    • Background
    • Modeling the turntable
    • Trackage
    • Drive mechanism
    • Position indexing
  • Turntable Calculations
    • Background
    • Calculations
    • Python code
  • Microstepping a stepper motor
  • Train Speedometer — Basics
    • Background
    • What you need
      • Scale factor
      • Units of speed
      • Sensors
      • Sensor separation
      • Elapsed time between sensor detections
    • Basics of operation
    • Calculating scale speed
  • Train Speedometer — Implementation
    • Background
    • Hardware
    • Setup
    • Operating the speedometer
      • Detect a train
      • Compute the train’s speed
      • Display the speed
    • Testing the speedometer
  • T-TRAK Module Wiring
  • (archive) Arduino Day 2017 in Rockville, Maryland
  • (archive) Switch Machine Controllers – version 1

model railroad electronics

Skip to content
  • Overview
    • Background
    • Toyama Light Rail, the prototype
    • Toyama Light Rail, the models
    • Track plan
  • Throttles
    • Background
    • Motor controller hardware
    • Motor controller software
  • Throttles — Implementation
    • Overview
      • Throttle System Units
        • Throttle Unit
        • Controller Unit
        • Power Monitor Unit
  • Switch Machine Controllers
    • Background
    • Switch machines
    • Hardware
      • Update
      • Another update
    • Schematics
    • Driver Module printed circuit boards
    • Software
    • Special note: I2C over servo wire
  • Block switching
    • Background
    • What about those turnouts?
    • Switching a single block
    • Switching multiple blocks
    • Hardware
      • Block addressing logic
      • Relay decoder/driver
      • Relay module
      • Connection to control processor
    • Software
    • Timing requirement for relays
  • Track Sensors
    • Background
    • Sensors
    • Controllers and nodes
      • Sensor nodes
      • Sensor controllers
    • Sensor network
    • Software
      • Sensor nodes
      • Sensor controller
  • Trackside Signals
    • Background
    • Color-Light Signals
    • Obstruction-Warning Signals
  • Notes on Interfaces
    • Daisy-chaining SPI devices
    • I2C over servo cable
    • UDP network communications
  • Railroad Turntable
    • Background
    • Modeling the turntable
    • Trackage
    • Drive mechanism
    • Position indexing
  • Turntable Calculations
    • Background
    • Calculations
    • Python code
  • Microstepping a stepper motor
  • Train Speedometer — Basics
    • Background
    • What you need
      • Scale factor
      • Units of speed
      • Sensors
      • Sensor separation
      • Elapsed time between sensor detections
    • Basics of operation
    • Calculating scale speed
  • Train Speedometer — Implementation
    • Background
    • Hardware
    • Setup
    • Operating the speedometer
      • Detect a train
      • Compute the train’s speed
      • Display the speed
    • Testing the speedometer
  • T-TRAK Module Wiring
  • (archive) Arduino Day 2017 in Rockville, Maryland
  • (archive) Switch Machine Controllers – version 1

Recent Posts

  • Arduino Days 2025 event in Ashland, Virginia
  • Added Microstepping page
  • Train Speedometer YouTube posted
  • Train Speedometer pages added
  • Updates to Turntable pages

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Month: March 2020

Leave a comment Posted on March 23, 2020 Uncategorized

Arduino Day 2020 – RESCHEDULED

Due to the closures and restrictions caused by the coronavirus pandemic, the Arduino Day 2020 event at the Chinn Park Regional Library in Woodbridge VA has been rescheduled to Saturday, June 20, 2020, from noon to 4 PM. (This just happens to be the Summer Solstice too. 😉 )

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