Automatic Interchange
Spring Switch

CKT-IRSENSE: Reflective Infrared Proximity Sensor

CKT-IRSENSE: Reflective Infrared Proximity Sensor
CKT-IRSENSE: Reflective Infrared Proximity Sensor CKT-IRSENSE: Reflective Infrared Proximity Sensor CKT-IRSENSE: Reflective Infrared Proximity Sensor CKT-IRSENSE: Reflective Infrared Proximity Sensor CKT-IRSENSE: Reflective Infrared Proximity Sensor CKT-IRSENSE: Reflective Infrared Proximity Sensor
Brand: Iowa Scaled Engineering
Product Code: CKT-IRSENSE
Availability: 32 pcs  (What's this?)
Price: $22.00

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CKT-IRSENSE is a low-profile reflective infrared sensor utilizing the latest in proximity sensing technology.

Features

  • Small size (0.25" x 2.25")
  • No adjustment needed
  • Simple, discrete under-track installation
  • Variable release time up to 23 seconds (or 23 minutes with Long Delay option)
  • Two opposite polarity outputs (40V / 250mA capable)
  • Tolerant of background lighting conditions (no false triggering)

Installation

The detector is designed to be installed up through the benchwork in a 3/8 inch (10 mm) hole.  Because the sensor itself is so small, only a single hole is required and no complicated drilling jigs are needed.  The sensor can be secured in the hole using a variety of methods such as hot glue or by using a bracket.  An example mounting bracket can be found here.

Electrical Connections

The CKT-IRSENSE needs 5-24 volts of clean direct current (DC) power to operate.  Two opposite polarity outputs are provided, both of which are “open drain” (otherwise known as “open collector”) and act like a switch to the ground / negative lead.

Logic level outputs can be generated by connecting a resistor to pull up the output to the positive supply.  Other devices, such as LEDs or relays can also be driven directly and the outputs from multiple sensors can be connected in parallel to combine them into one signal.

Options

The release time is variable from 0.1s to 23s (Normal Delay Option) or 6s to 23 minutes (Long Delay Option) using an external resistor.  See the user manual for details.

The activation time is preset to 0.1s.  The sensing distance varies with the reflectivity of the object being sensed, but is typically 1.5".  Both can be modified using custom firmware - contact us for details.

Applications

  • Activate grade crossing signals
  • Trigger a sound event using a CKT-SQUEAL sound player
  • Simulate a spring switch using an MRServo switch machine
  • Build an automatic interchange
  • Block detection for signal systems
  • Occupancy detection on hidden tracks
  • End-of-track indication in hidden staging yards
  • C/MRI track occupancy inputs

User Guide

User's Manual

Design Files

The latest CKT-IRSENSE hardware design files and source code are now available at GitHub!

Hardware v3.2 Schematic

CKT-IRSENSE is made available under license from Nathan Holmes and Michael Petersen. The design is released under the Creative Commons BY-SA license, and the source code is released under the GPL v3.

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The CKT-IRSENSE is a component intended to be used in a larger system. Suitability for any particular application is the sole responsibility of the end user. The CKT-IRSENSE is made available under license from Michael Petersen and Nathan Holmes. The design is released under the Creative Commons BY-SA license, and the source code is released under the GPL v3.
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