Model Train Detection Circuits

In the December 2016 Model Railroader, Detlef Kurpanek describes how designed an operating model railroad signal system that uses Arduino microcontrollers. If the power source is substantial enough, a short circuit may cause heat of explosive proportions to manifest, causing equipment damage and hazard to nearby personnel. This post describes the process of training a neural network using Tensorflow Object Detection API and using a Python script built around it to find Wally. A library for use with an Arduino that supports DC model train control for simple small models, such as N-Scale or efficient HO/OO, using one of several common motor shields. IRDOT-1 infra red train detector with relay and delay The infrared emitter and detector are on the reverse side of the circuit board and therefore not visible. When an intruder enters the detection zone, changes to the field are registered and an alarm occurs. Train Detection. As can be seen in the schematic diagram, it comprises of a simple infrared transmitter and receiver wired around the good old PLL Tone Decoder LM567(IC1). This way both lights come on when either detector activates or with the switch. The circuit on this page is for a fast acting electronic circuit breaker for use with fixed and variable, low voltage AC and DC systems such as model railroad throttles. In this case, I use a detection system independent of the current consumed by the train. How to Build a Tuned Infrared (IR) Detector Circuit Last Updated on February 17, 2018 by admin Leave a Comment The article is a continuation of the prior publish where we wanted to come across an alternative for developing special infrared IDs for trains in a model locomotive system. They will report when any part of any train is adjacent to the detector. In 2009, Bob Frey had an article in MR on a circuit he designed and/or used. *FREE* shipping on qualifying offers. This note is another in my series of attempts to spread knowledge of this surprisingly simple skill. A redstone circuit is a structure that activates or controls mechanisms. When light from Infrared sender (D1) is relected by the wagon of the model train, IC1 through Infrared photo sensor (D2) receives the recovered signal at its input point (pin3). Signaling controls. The sensor I'm using is a QRE1113 line sensor breakout from SparkFun Electronics of Niwot, Colorado. Model Railroader is the world's largest magazine on model trains and model railroad layouts. A clinic presented by Glenn Edmison, Bend, OR PNR Division 1 Good afternoon. Boasting a large range of standard control options and features, an enhanced range of control and interfacing add-ons as well as an improved network capacity, the FireFinder Plus is ideally suitable for all sizes of fire detection systems large and small. This circuit is a simple IR detector for testing IR remote controllers. How the Breadboard and Circuit Works. Crossing Signal Photo-Detection Control Circuit East Coast Circuits. Track circuits: new white paper in PDF format on railwaysignalling. 28-Aug-2016 Platform Indicators. Read about 'Arduino for my Father's Model Railroad Layout' on element14. If you are interested in signalling for your model railroad, or just curious, we encourage you to take a look at this article. Technical aspects of a model railroad : wiring rules, wiring the turnouts, wiring for DCC, block detection, Infrared trains détection, PCB's, carpentry and the choice of different woods, etc. It relies on the automotive light method of short detection/protection i. Save on Model Railroad Digital Control Devices Trending price is based on prices over last 90 days. If you are getting into optical detection there are also detectors (from Heathcote Electronics I think) that bounce an infra-red beam off the bottom of the rolling stock. The principle is simple but effective. See the update about the new signals on our club layout (July 2014) at the bottom of the NMRC page. It will eventually include switching systems for turnouts, power control wiring, railroad signal lights, and train and railroad car and engine block detection. FBM-1 DCC Block Detection Module. This system is used in-between two stations which will detect the cracks. Code description, posible causes and repair information | Powertrain Codes Page 1 | AutoCodes. A typical model railroad layout typical includes at least powered turnouts and signals, along with crossing gates and lights. This test track was built to test all the components of the train detection system. Over the last two articles on garden railway sensors we dealt with devices that can give good service when properly installed and utilized. Here is the simplest over-current circuit:. You could also skip the board and solder the wires to the two pins that extend from the bottom of the coil. Here we give an example from the model train world. In fact, you could wire BOTH detectors and the switch in parallel. DCC Specialties "Block Watcher" Block Detection Module DCC Specialties and Integrated Signal Systems (ISS) collaborated to develop and design the BlockWatcher. The circuit diagram of the motion detector using NE555 timer is shown in Fig. Unpowered equipment can be detected by using metal wheelsets with resistors connected across the insulator. Therefore, it is difficult to form a true antenna for most RFID appli-cations. The LDRs are then placed half a wagon length apart. A train is detected because it shorts the circuit. These two different. Read about 'Arduino for my Father's Model Railroad Layout' on element14. Hier finden Sie alle wissenschaftlichen Publikationen seit dem Jahr 2008, die aus Arbeiten von Mitgliedern des Instituts für Rechtsmedizin hervorgegangen sind. The first reed switch changes the signal to red as the train passes, then further along the track a second reed switch changes the signal back to green ready for the next. (see Technical / Wiring Part 3: DCC) It is sometimes necessary to detect the train more accurately or if the current detection does not work. It operates by detecting the distance from the target by reflection of an infra-red beam. fr/2019SACLS103/id Missie María del Rocío Aguado rojas http://www. An optical sensor is supplied, pre-wired and ready to fit within the tracks or adjacent to the rails. It is intended to be inserted inline with one block feeder wire and provide a signal indicating a track block has current flowing in it. A H-bridge circuit made of TIP3055 and TIP2955 is used for the motor drive since the motor needs somewhat higher ampere rate. The first time we ran a digital command control system we knew we couldn't live without one but, we couldn't afford it either. Signals For Your Model Railroad - Getting Started. Autoencoders and anomaly detection with machine learning in fraud analytics how you can use autoencoders to pre-train a classification model and how you can. When light from Infrared sender (D1) is relected by the wagon of the model train, IC1 through Infrared photo sensor (D2) receives the recovered signal at its input point (pin3). A “fault” is another word for a problem. Boulder Creek Engineering. The red lines in photo below show how the breadboard is connected internally. Position sensor detection is a little easier to set up and is great for smaller layouts. (Photo courtesy of John Parker). and then after a selected time period start the train again having changed the signals automatically in the mean time. JPSS-1 VIIRS data are combined in these products with Suomi-NPP active fire detection data. Coded pulsed infrared proximity sensors for detecting model trains on the track. A short will happen when a train enters a turnout from the frog end and the points are set against the direction in which the train is traveling. Train Detection Methods For Model Railroads Train Current Detection - Solid State, Common Rail - Solid State, Isolated - Relay Gate Detection - Photo Transistor and Light Source - Magnet and Reed Switch - Train Operated Electrical Contacts. End detection - the Train Shuttle has built in current detectors that use a gap in the rail to isolate a detection section. Locomotives and lighted passenger cars do this. This allows current to flow from Q1's detector and exiting out Q1's emitter. Some of these cookies are essential to the operation of the site, while others help to improve your experience by providing insights into how the site is being used. In railroading, this is called "shunting" the circuit. Boulder Creek Engineering. I wrote a short synopsis of my back ground that can be found by going to my About Me page. MICRO HOT BEARING DETECTOR SIGNALING 800-476-8769 progressrail. NCE BD20 Block Detector Model Railroad Electrical Accessory #205. (see Technical / Wiring Part 3: DCC) It is sometimes necessary to detect the train more accurately or if the current detection does not work. With model trains, D1 and D2 are best used embedded in the track, with reflectors glued to the underside of selected rolling stock. LCC (Layout Command and Control. Don't see the part or model you are looking for, give us a call at (717) 505-8676 and let us order it for you. Details of the project are shown below - enjoy! John Cornell … Read More. An HO Scale Model Railroad featuring do-it-yourself electronics, computers, DCC and operations. Detecting Current Flow. Detection-based modules. It's most common use is to detect a person moving through an area where the motion detector can sense. System) and microcontroller based broken railway track detection when implemented is an efficient method of detection of cracks which is present in the tracks and thus avoiding derailment of the trains. The simplest methods involve installing trigger points that detect a passing train using optical or magnetic sensors. And I very often see a sad picture as on an excellent model layout several trains monotonous and boring move on parallel circles. Circuits are designed to act in response to player activation or to operate autonomously — either on a loop, or in response to non-player activity such as mob movement, item drops, plant growth, etc. Of course, all are 100% compatible with the Train-Brain's sensor ports. The Grade Crossing circuit uses six visible and infrared light sensitive phototransistors to detect a train and control the circuit. What's next? Just follow the schematic circuit diagram to build your own model railroad controller unit (which is nothing but a "LASER Beam Trip Sensor" based visitor detector), and connect the finished circuit to port J1. Now, Let's get started. In addition to its basic function, the clear/occupied notification, Frauscher axle counting systems also provide information such as the direction, and the number or speed of the axles or wagons. Model Railway optical block detector hook up and demo DIY Arduino Model Railroad. These are all original designs and are completely manufactured right here, not in Asia. This system is used in-between two stations which will detect the cracks. A counting head (or "detection point") is installed at each end of the section, and as each train axle passes the counting head at the start of the section, a counter increments. Symbol usage depends on the audience viewing the diagram. This is a compact PCB to detect a train or rolling stock in any railway model. Boulder Creek Engineering. Be careful not to put loads in series! The voltages across the loads will vary if placed in series! By placing the loads in parallel, the same. When a westbound train approaches and enters the east approach circuit, the train shunts the rails (shorts them out) and this triggers a relay in the signal control box. An HO Scale Model Railroad featuring do-it-yourself electronics, computers, DCC and operations. Richard Kerr PhD] on Amazon. Learn how to build a DCC controlled uncoupler. Now that the dataset has been assembled (and your tfrecords), the next task is to train a model based on this. Wiring your Layout for Controlling Signals and Block Occupancy Detection. • Automated Block Signaling using DCC Signal Driver Decoders. easydetect features 2 detection points. TLDR: We train a model to detect hands in real-time (21fps) using the Tensorflow Object Detection API. Detects presence of train in block by the current it draws. If you are using a double pole, double throw (DPDT) toggle switch, wired up as Linn Westcott indicates in his book, How to Wire Your Model Railroad, to reverse current, then this circuit can easily be added to your existing system. Independent control or double heading control. This is the AR-1 Automatic Reversing Circuit from Circuitron. 1 x prewired IR sensors train detector for block signal controller master board 1 x N scale model train block signals railway LED light 2 aspect silver #160S2MD. It has been a fifteen year long spare time project. Current Detection. Track Circuits. There will be at least three sections, covering. 1: Circuit diagram of the motion detector. This circuit has applications as a proximity detector or liquid level detector. Thank you for visiting us!. This is the basic ring detection circuit. First up was a way to store lumber. J2C Engineering Train Current Detection Manual 2 Introduction: To successfully install a prototype signal system or a complex CTC (centralized traffic control) on a model train layout, a very reliable and accurate train detection circuit is necessary. even with the capacitor the sensor is sensitive enough for this application. output - in these circumstances train detection fails in the forward direction at all but the lowest. The TRAK-DTL is a variation of current detection that includes a latching circuit to hold the relay position. Ever wondered how fast your model trains go? Here's a way to measure the speed of your trains on your model railway. 00 Ends: 15/Oct/19 1:09 PM EST https://www. used to provide detection to activate the crossing flasher kit shown above, also can be used to show position of trains in your hidden staging yards. Every seasoned model train enthusiast knows that there is nothing worse than having to find the cause of a short-circuit. If I had a bigger house I would have model trains and will be happy to help you develop something if you would. Description. Pulsing (modulation) allows the detector to ignore ambient lighting. Chapter 7 Appendix – Design of the 11011 Sequence Detector. Our story begins in 2001; the year an efficient algorithm for face detection was invented by Paul Viola and Michael Jones. It has been a fifteen year long spare time project. I built an Arduino powered model train crossing controller. Box colors indicate tracer color of main cables, clear boxes are open wires in twisted pairs. The rear brakeman on this Houston Power and Light coal train is just about to snag the train orders in front of the Santa Fe depot at McGregor, TX. An introduction: Needs no manual operation for switching ON and OFF. As electronics projects go, this speedometer from trainelectronics. An HO Scale Model Railroad featuring do-it-yourself electronics, computers, DCC and operations. Bill Payne and I have been experimenting with logic circuits for trackside signals for use on our Nottawasaga Model Railroad Club (NMRC) and our home layouts. What Is A Simple Circuit An Introduction to Electronics for Science Students Curtis A Meyer Amazoncom Books its difficult to describe just how both physically and mentally painful this book is to read Meyer writes in a horribly verbose and convoluted manner where he writes sentences that are evidently facts without any real derivation or reasoning given The example problems are sparse and even. In this post I will share with you how I get rolling stock ready for circuit detection on an N Scale DCC layout. Occupancy Detection on the Teton Short Line. FIRE DETECTION AND ALARM. This prevents them from recovering properly from an actual short circuit EVEN AFTER the actual short circuit itself has been cleared. (Photo courtesy of John Parker). The electronic circuit board filters out background infrared and electrical noise. We feature beginner and advanced help on all model railroading scales, including layout track plans, model railroad product reviews, model train news, and model railroad forums. KEN'S HOBBY ELECTRONICS PAGE. The Infrared Detector Applications Guide shows how to use NightScope™ Infrared Detectors with a wide variety of model railroad electronics. One wired and set up (below) it'll measure and display the speed in actual. output - in these circumstances train detection fails in the forward direction at all but the lowest. There is an email link at the bottom for any questions or feedback. Three reset options (secondary voltage, load current, or time) to meet various application needs. External reset circuits may be required when internal reset circuits are not suitable. In order for block detection to work, your train needs to draw current. fr/237132990 2019 William Pasillas-Lépine 2019-05-27T10:29:03Z. The article is a continuation of the earlier post where we tried to find a solution for creating unique infrared IDs for trains in a model locomotive system. 28-Aug-2016 Platform Indicators. This project is about Model Railroading with Arduinos. FBM-1 DCC Block Detection Module. It is primarily intended for lines where train detection is provided by some means other than track circuits. Ataras Engineering: Manufacturer of model railroad train detection and signaling products, and a distributor of products related to signaling and train control. This is a circuit which can detect any motion or movement. The Block Watcher comes ready to install, all you have to do is to connect it between the DCC booster or circuit breaker and the rails. Diode Detector Circuit Using the NSR201MX Overview This application note explains about ON Semiconductor NSR201MX which is used as a diode detector circuit. The main component of the system is the crack detection circuit. Electronic Circuit Schematics. NJ International, Inc. However, many items like our L ighting and Tubing products, our Lighting Effects products, our Little Sound products and several of our Detail products are perfectly suited for all scales. As with everything I do it is a slow process but I am making headway. [1] A simple electric circuit contains a power source (battery), wires, and a resistor (light bulb). A capacitor at the base of the transistor solved the problem. The circuit on this page is for a fast acting electronic circuit breaker for use with fixed and variable, low voltage AC and DC systems such as model railroad throttles. The completed circuit is shown in green on the diagram. Ever wondered how fast your model trains go? Here's a way to measure the speed of your trains on your model railway. The system can feature up to 4 live cameras, either hard wired or battery powered depending on your requirement. Check out their reviews and buy them from our online store:- 3 Great Books to Learn 555 Timer Circuits and Projects. The first time we ran a digital command control system we knew we couldn't live without one but, we couldn't afford it either. Find out what materials conduct electricity better than others. A built in filter keeps the DBD22 from rapidly turning off and on if the current flow is interrupted. Although designed for Free-mo modules, the FCM-1 can be used on any model railroad layout where signals is required. You could also skip the board and solder the wires to the two pins that extend from the bottom of the coil. A track circuit may also be used to communicate com-mands, instructions, or indications between the wayside and a train. Locomotives and lighted passenger cars do this. They are the eyes and ears of your remote control system. We feature AC and DC Power, Railroad, Gas Tube, RF Coaxial and Critical Circuit lightning and surge protective devices for many applications. I added white paper strips to the bottom of the wagon and loco to aid detection. Olimex Ltd. Wayne Rodericks Teton Short Line, Home. Here we give an example from the model train world. There are a lot of reasons why we would want to electronically detect the presence of a train. This project presents the system for automatic crack detection in railway tracks. € Toy Trains for Children. Failure to train, supervise and discipline LEOs: The Third Circuit speaks Case demonstrates what happens when police supervisors display indifference to their responsibility to train, supervise. Including our award-winning Snap Circuits. very easy to build even for beginners. Circuitron #800-5204 DT-4 Rolling Stock Detector Ideal for spotting a hidden train or piece of rolling stock. My layout is set in the mid 1950s in the Southern New Mexico/West Texas area. I wrote a short synopsis of my back ground that can be found by going to my About Me page. Most crossings work on a 3 circuit system. Circuitron #800-5204 DT-4 Rolling Stock Detector Ideal for spotting a hidden train or piece of rolling stock. very easy to build even for beginners. Model Rail Shuttle Module with Infra-Red Detectors. There are many other options including audible & ultrasonic sound sensors and devices that sense visible light such as photo transistors and CdS cells. I have used Tortoise for years never replaced one, (TRUE!) all but 8 turnouts in the plan are worked by them. The SEL-GFD provides the following features and benefits: Ground fault detection by sensing the vector sum of the current flowing through a three-conductor cable. We will be happy to provide assistance free of charge in the design of the system to meet customers' individual requirements. The detector requires a +12 volt filtered DC isolated power supply one detector is required for each block. Of course, all are 100% compatible with the Train-Brain's sensor ports. A counting head (or "detection point") is installed at each end of the section, and as each train axle passes the counting head at the start of the section, a counter increments. Box colors indicate tracer color of main cables, clear boxes are open wires in twisted pairs. If anything is above the beam it will reflect some of the infrared back. The detection unit could be used for a variety of purposes including activating the GCF-1, GRADE CROSSING FLASHER/DETECTOR with two rail trains, light up a control panel, substitute for insulated rail detection in areas with many turnouts or activate accessories. Training the hand detection Model. FireFinder Plus. Isolate this section of track by gapping one of the rails at the start and the end of the block. output - in these circumstances train detection fails in the forward direction at all but the lowest. The Wien Bridge oscillator circuit can produce distortion less sinusoidal sweep at its output. This Water Level Detection System senses when the water in a boiler approaches a low level and is in danger of damaging the boiler by changing the normally Green LED to Red. • Automated Block Signaling using DCC Signal Driver Decoders. As electronics projects go, this speedometer from trainelectronics. As the train leaves the yard for the mainline, it is detected and identified, then the system tracks it from then on as it moves from block to block. In fact real railroads were using this method in the 1800's (it was invented in England in 1864). This series of posts will cover a simple method of doing that using a classic circuit published by Richard Schumacher in the NMRA Gateway division website. Detectors send out a signal which is used by the USCB to initiate a cycle of the attached head. And for the DCC user: The SMAIL™ is a TORTOISE™ with a built-in DCC decoder that provides simplified wiring and control directly from your DCC cab. Train Detection Detecting the presence or absence of a train, or its identity, is an important capability. easydetect features 2 detection points. Never have been, never will be!. Model trains are built to look like exact replicas of the real thing. Paramount to most C/MRI applications is the need for the computer to be able to determine which sections of track are occupied. You've probably seen a lot of reversing/stopping circuits around, but the majority of these run on occupancy detection in track blocks. We also provide a selection of detection, signaling, and automation devices for controlling your model layout. Model-railroad-infoguy. Unpowered equipment can be detected by using metal wheelsets with resistors connected across the insulator. EP Circuits quickturn prototype pcb's can include solder mask. Track circuits operate by transmitting a signal to a receiver via the two running rails of a track section. Track circuits can be used to define crossing activation sections, signal blocks, and other applications of detection of trains. Model trains are built to look like exact replicas of the real thing. com (Bidder Service) Tue, 01 Oct. We acquire and assemble the required electronic components to create "route indication" system circuit panels to be compatible and interact with your detection system. For over 60 years, Atlas has been a leader in the world of model railroading. Four independent detection units combined onto one circuit board, can be used separately or together to control external devices. There are a lot of reasons why we would want to electronically detect the presence of a train. Lionel Trains, Train Sets, Train Tables, Antique Trains. ) The example below shows wiring for a three-color Type D signal using 3 mm LEDs for insertion into an Oregon Rail Supply type D target. Short circuits are generally to be avoided, as they result in very high rates of electron flow, causing wires to heat up and battery power sources to deplete. {"article":{"id":"91089","heading":"'AIDS TEST' Tyranny","author":"Paul King","created":"2003-10-27 13:33:28","modified":"2005-08-14 18:46:15","last_modified":"Mon. Track Circuits. NCE Current Sensor If you would like a complete sensor unit that requires no soldering you can get the NCE DB20 Block Detector for less than $15. As with everything I do it is a slow process but I am making headway. The big issue with optical is that they detect the presence of a train at a certain location, unlike the current detector which detects that there is no train in a section. NightScope™ Infrared Detectors sense approaching trains and activate this double track road crossing on John Parker's Fall River Division. Model Railroad accessories in HO-N-S-0 scales Home Signals Crossing Signals. LM358 is an operational amplifier (Op-Amp) and in this circuit we are using it as a voltage comparator. With CTI's easy-to-use network interface, modules may be placed throughout your layout, wherever you desire computer control. 5 to 10 amps. In the non-model railroad world (yes, there is such a thing!), magnetic detection is primarily used for home alarm systems to detect open doors or windows. A clinic presented by Glenn Edmison, Bend, OR PNR Division 1 Good afternoon. As opposed to the anti–collision devices present in the market today, this system is not designed to control the vehicle. output (500 ma. The SEL-GFD provides the following features and benefits: Ground fault detection by sensing the vector sum of the current flowing through a three-conductor cable. We sell and ship products globally to all SEVEN continents! Read more about the goals and different ascpects of our company. Digitrax Bxp88 Loconet Occupancy Detector 8 Detection Wtransponding. All types of sensors can be basically classified into analog sensors and digital sensors. The circuit on this page is for a fast acting electronic circuit breaker for use with fixed and variable, low voltage AC and DC systems such as model railroad throttles. This can work very well but, due to the differences in train engines, you can have issues with how quickly to slow/stop individual locomotives. 00, 4 beam $33. The Infrared Detector Applications Guide shows how to use NightScope™ Infrared Detectors with a wide variety of model railroad electronics. You can build a small layout on a sheet of 4x8 plywood on up to a basement size model railroad empire!. Code description, posible causes and repair information | Powertrain Codes Page 1 | AutoCodes. Experts in Digital Command Control (DCC) and custom signaling, detection circuits, animated details and control systems. Coded pulsing allows each detector to ignore the IR signals of other nearby detectors. You can use the existing railroad power unit or an independent power source to energize the controller block. Train 332 has just passed a wayside defect detector, one of thousands employed by the railroads to monitor trains and the fixed plant. This is a simple IR sensor block detector for model railroads. This is a compact module to detect a train or rolling stock in any railway model. One wired and set up (below) it'll measure and display the speed in actual. Inductive Detection Circuit Detecting trains via current sensing is not new. The short circuit will reach your command station, which will deactivate the layout as a safety. This project is about Model Railroading with Arduinos. See the update about the new signals on our club layout (July 2014) at the bottom of the NMRC page. Proximity detection - whether a train is located at or near a point on the layout. Working of the circuit is straight forward. The detection unit could be used for a variety of purposes including activating the GCF-1, GRADE CROSSING FLASHER/DETECTOR with two rail trains, light up a control panel, substitute for insulated rail detection in areas with many turnouts or activate accessories. And this is how the IR detector circuit works. There is a distinct difference between model railroads and toy trains. Seems some components are no longer available. Free shipping on many items. And for the DCC user: The SMAIL™ is a TORTOISE™ with a built-in DCC decoder that provides simplified wiring and control directly from your DCC cab. it doesn't cut the track power completely but absorbs the overload with the bulbs and as soon as the reason for the short is corrected, operation can resume. The electronic circuit drives a single LED lamp in such a way that it produces light which simulates the rotation. It takes a few cycles for the capacitor to charge to the peak as in Figure below due to the series resistance (RC “time constant”). With CTI's easy-to-use network interface, modules may be placed throughout your layout, wherever you desire computer control. Train Detection. It can be used to trigger crossing gates, to manage lineside signals, to create a dispatchers panel showing where trains are, as part of an automation system, or for all of these purposes. Just remember as you say, the switch wont turn the light off when the detector has activated. It is quite useful to make a jig to hold the LEDs while soldering leads to them, as. Its correct operation is critical to obtaining dependable train operations in most main line and metro systems. 5 to 10 amps. Save on Model Railroad Digital Control Devices Trending price is based on prices over last 90 days. Train Detection can be divided into three broad categories by location accuracy: Block detection - whether a train is located somewhere on a particular section of track, or block. This is partly due to the fact that many model railways use fully welded track (where the 'sleepers' are welded to the rails and short circuit across the rails. This simple and economical IR model train detector circuit is intended especially for those hobbyists who wish to add a smart sensor to detect trains on their model railway track. What's next? Just follow the schematic circuit diagram to build your own model railroad controller unit (which is nothing but a "LASER Beam Trip Sensor" based visitor detector), and connect the finished circuit to port J1. It was expanded with the. And for the DCC user: The SMAIL™ is a TORTOISE™ with a built-in DCC decoder that provides simplified wiring and control directly from your DCC cab. BLOCK OCCUPANCY DETECTOR. We stock a wide range of circuits such as Capacitor Discharge Units (CDU), Point Position Indicator Circuits, traffic light circuits and level crossing simulators. This circuit is under:, circuits, Infrared Model Train Detector Circuit l43176 This simple and economical IR model train detector circuit is intended especially for those hobbyists who wish to add a smart sensor to detect trains on their model railway track. Discussion includes O, S, HO, N and Z, as well as narrow gauge topics. The sensor I'm using is a QRE1113 line sensor breakout from SparkFun Electronics of Niwot, Colorado. Infrared ('IR') Train Detectors.