$401.81. 24 hour traffic control Multitude of modes for many applications Numerous options to fit your need Portable Traffic Signal Applications Bridge Construction 2-Lane Road Construction Power Outage Downed Signal Replacement Utility Work Bridge Painting Culvert installation Event Traffic Control Natural Disaster Traffic Control Tree trimming If there is no traffic near a signal, then the system will skip this signal and will move on to the next one. 2- Finding the state diagram of the system. . TrafficLights.com, a division of Lights to Go, Inc., proudly offers custom light applications for customers needing more than an off-the-shelf solution.Because we have a full-service production facility right here in the United States and years of experience in the industry, we are uniquely positioned to . This system is different from existing systems, because it regroups two intelligent systems (the traffic light control system and the intelligent parking system) . "void delay"-Program to . Traffic_Light_Controller "void dat"- Array for the numbers to display while the red light is ON. Parallel circuits are added to turn ON/OFF the output in up next sequence. Communicates with a web server (implemented in Node JS) for visualizing application behavior in a web application. Traffic Light Control: Traffic Light Controller Using 8086. Traffic control systems include signs, lights and other devices that communicate specific directions, warnings, or requirements. They aim to realize smooth motion of cars in the transportation routes. Step 4: Connect Button. Step 2 The user has to open up Visual Studio and select a fresh project using the steps in the below picture. point led arranged by 4Lanes. In this project you will design and implement a 4-way traffic light controller that uses pressure activated sensors embedded into the roadway to determine the sequence of light changes used to optimize the flow of Question: Semester Project - Traffic Light Control There are many applications for controller circuits. A simulation control protocol embedded in PARAMICS software tool capable of conducting area-wide micro simulation is adopted to design the logic frame and function module of the area-wide traffic. This project is an Arduino board based Traffic Light system. Add button to center of breadboard. make traffic light controlling more efficient, there is a new technique called as "Intelligent traffic light controller". At the Fraunhofer Institute for Optronics, System Technologies and Image Exploitation IOSB, researchers in the institute branch for industrial automation INA in Lemgo are using artificial intelligence for smart traffic light control as part of the "KI4LSA" and . With a renowned product range covering pedestrian and intersection controllers, signal heads and Extra Low Voltage (ELV) equipment, we are able to offer complete solutions for all on-street equipment. 100 in stock. I have previously posted a simple Traffic light system for one way roads with small timings check it out if you are interested in it. Address: 10435 Argonne Woods Drive Woodridge, IL 60517. The invention has two. It is a simple project of light system, which is used to control traffic. A sensor on the farm is to detect if there are any vehicles and change the traffic light to allow the vehicles to cross the highway. It is used in the controlling system of traffic light; Immersion rod; TV remote control, Author : Hema Sundaresan. Traffic lights consist normally of three signals, transmitting meaningful information to drivers and riders through colours and symbols including arrows and bicycles. In this way a minimum of 4-states are possible for which different vehicles will pass through [Type text] Page 5 6. Prepared by : Rohayu Mohamed (2012434738) Siti Nor Fatin Ghazmi (2012616566) Siti Fatnin Mohd Na'izam (2012475122) 2. - Connect bottom left with 1 Mohm resistor to ground. Veh_Red and Man_Green are always asserted at the same time. The limitations of traditional passing vehicles have been . The timings of Red, Green lights at each crossing of road will be intelligently decided based on the total traffic on all adjacent roads. This concept spreads throughout the entire table. Example: Traffic light controller A busy highway is intersected by a little used farm road Detectors C sense the presence of cars on the farm road With no car on farm road, lights remain Green in highway direction If vehicle on farm road, highway lights go from Green to Yellow to Red, allowing the farm road lights to become Green It can be programmed fairly easily using Visual Basic 6. 1 Comment. One could power the Relay board with a separate 5v DC power supply, but Arduino is already designed with a 5v output. Application A Smart Traffic Light Controller. Introduction: In this project, an Arduino based traffic light controller system is designed. Similarly, it applied on Veh_Green and Man_Red. Traffic lights control system is an example of control system. 8,500.00 Exc Tax. 1. A variety of different control systems are used to accomplish this, ranging from simple clockwork mechanisms to sophisticated computerized control and coordination systems that self-adjust to minimize delay to people using the . Example: traffic light controller A busy highway is intersected by a little used farmroad Detectors C sense the presence of cars waiting on the farmroad with no car on farmroad, light remain green in highway direction if vehicle on farmroad, highway lights go from Green to Yellow to Red, allowing the farmroad lights to become green The below given steps will help you to develop a Traffic Control application which works for single side direction. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . Our Smart Traffic application is developed on the basis of the Android Studio 3.5.3, and it is illustrated in Figure 37. A traffic light control system based on 555 timer circuit has been designed. Traffic Signals and Controllers. In this example, we'll make the traffic lights switch the color using Timer (both car and pedestrian traffic lights). Rajesh S, R S, P A, S K, Jackson B, B KB. The real time traffic light controller is a complex piece of equipment which consists of power cabinet, main controller or processor, relays, control panel with switches or keys, communication ports etc. The normal function of traffic lights requires more than sight control and coordination to ensure that traffic and pedestrians move as smoothly, and safely as possible. The changes within the preferred output can be the effect of disturbances. If you liked this article, then please subscribe to our YouTube Channel for PLC and SCADA video tutorials. Here, a sequence of input signal is applied to this control system and the output is one of the three lights that will be on for some duration of time. The regular traffic light colours are red, yellow, and green arranged vertically or horizontally in that order. Each LED has provided for current limiting resistor to limit the current flows to the LEDs. Comparator blocks are used to reduce the number of timers used. $103.77. by Marc. The #include files of the program includes the registry files of the 8051 Microcontroller.The program was classified into four sections which is. OpenCv based Traffic Light Control System using Python. Phone: (630) 543-1300 Fax: (630) 543-5050. Such as traffic light control, temperature control, stepper motor control, etc. Save the new file by clicking File >> Save. LED, microcontroller Traffic light system was one of the fascinating applications of Embedded systems and have been using the same till this day. Are you interested in speaking with a member of our team about your traffic control cabinet project? Traffic lights send various information to the approaching car, including the time till the next color change, so the vehicle can either automatically adjust speed to avoid stopping or inform the . You've seen . 5,486 views. Raspbian Menu Icon >> Programming >> Python 3 (IDLE). Transcribed image text: MCU Application Traffic light system Project 1: Design MCU system to control 3-ways traffic light system? During this time, the other two lights will be off. A new microcontroller based intelligent traffic control system is proposed in this paper. Control Purpose: Enabling the traffic lights to work by Start button X0 and to stop by Stop button X1. A simple traffic light controller is implemented in this project with a real chance of expansion. Step 3 It resets the pointers and moves the initial output setting to the output word. to traffic light control system, it is to combine the use of configuration technology and procedures related to plc, and through software simulation and traffic lights light changes, traffic light control system could achieve the monitoring problem, and if the system is in good condition, its application can save a lot of labor powers and Timers are used to give time delay for output to turn ON and OFF. The time slots are decided based on a traffic study. Step 1 We need Visual Studio for developing our application, and in my case I have used VS 2010 for its simplicity. 4 years ago. They aim to realize smooth motion of cars in. The program is all controlled by one on-delay timer. The applications of the open-loop control system include the following. We need to have the Arduino board communicate with the Relay board. The simple traffic light controller application is written in C for Micrium's C/OS-II (commonly known as uCOS) and is ported to a HCS12 microprocessor. "void dat1"-Array for the numbers to display while the yellow and Green light is ON. The researchers have implemented the technology of lean supply chain to boost up the performance of traffic light and control the traffic jam. The little defect in the proposed model can be overcome in such a way so that any time a pedestrian presses the switch for crossing, the initial rhythm remains unperturbed. Application of traffic light 1. Step 1: In this program, you have to insert one timer and set its interval to any figure. Manual, Airhorn Plus 3 Traffic Advisor Switches and Microphone with Extension Cable. As always, each APX traffic signal control cabinet is UL 508a Listed and supplied with the UL/cUL label. An Application-Driven Modular Traffic Light Control System Using Lean Supply Chain. - Connect bottom right to power rail on breadboard. Step 1: Connections on the Arduino and Relay. The time of red light in East-West direction equals to the time of "green light + green light flashing + Hint: the design should include the following steps: 1- Studying the basic of the project. Along with computers, communications equipment, and detectors to count and measure traffic, the controllers are frequently grouped together to control large numbers of traffic signals, either at intersections in a city or on ramps approaching . Traffic lights have equipment cabinets, usually located at their feet or corners of intersections. Email: sales@trafficcontrolcorp.com Terms and Conditions / Disclaimer of Warranty They are so many ways to write a program for traffic light control ex: sequencer output method but in this normal input, outputs and timers are used. Combination of red and green LED's are provided for . In this circuit, 6 LED's of three different colors are used to implement traffic lights at 2-way intersection. SKU: An Intelligent Traffic Light Management system Categories: OpenCV Projects, Projects. Traffic Light Control using PLC Logic Explanation Network 1 Latching rung to operate the system through Master Start and Stop PB. Roads are chronically congested and vehicles queue endlessly at junctions. Three output signals named Veh_Red, Veh_Amber, Veh_Green control the flow of vehicles while the other two signals named Man_Red, Man_Green control the flow of pedestrians. Download Project Document/Synopsis. Advantages of traffic control signals on the road. Abstract: Traffic light control systems are widely used to monitor and control the flow of automobiles through the junction of many roads. Control - Building a PLC Program - Traffic Light This section of the control will tell the PLC what to do when the unit is first powered on. Example 2: Traffic Control System Open Loop System example: Traffic control by means of traffic signals operated on a time basis constitutes an open-loop control system. Applications. Project requirement: 4 Green LED 4 Red LED - Connect top left to pin 2 on Arduino. You'll need the LED Class, and to tell it that the LED is on pin 17. Traffic signal controllers are electronic devices located at intersections that control the sequence of the lights. This rotates the traffic light through yellow and red, then back to green. A traffic light controller produces five output signals. An Intelligent Traffic Light Management system. Components Requirements: Following is the list of the basic components, which we will be using to make our traffic light Control System. As this gets called inside the loop function, the Arduino will run this code forever, with a 15-second pause every time. Our cabinets are made in the USA. #Welcome to Mex Tech youtube channel..in this video i'm gonna show you how to make automatic traffic light controller using 8051/8052 microcontroller,this vi. Yunex Traffic website. Custom Light Applications for Any Traffic, Industrial, Manufacturing or Recreational Need. Instead of changing traffic lights automatically for a given interval, this system allows passing the vehicles considering the number of vehicles on the roads. The system consists of electro mechanical controllers with modern solid state computerized systems which has easy setup and maintenance. Combinations of red, amber and green LED's are provided to indicate Halt, Wait and Go. Armed with a laptop, University of Michigan security researchers hacked nearly 100 wirelessly networked traffic lights and were able to change the state of the lights on command. 5- Writing the program. In this project, the traffic lights are interfaced to Microprocessor system through buffer and ports of programmable peripheral Interface 8255. Traffic light controller (TLC) has been implemented using microcontroller FPGA, and . This sets the minimum time between each step. Also, The mobile phone is used to access the Internet, via Wi-Fi . The light sequence in sec = 1 will be active whether the system is on 1.20 seconds or 1.99 seconds of operation. The change in output can be done automatically; Applications. LED Traffic Lights for Industrial Applications Industrial Traffic Solutions (ITS) designs, manufactures, and sells a wide variety of quality LED Traffic Signals which maximize energy savings while reducing maintenance costs. To create a new file in IDLE, You can click on File and then New File in IDLE's menu bar. VHDL code for Traffic Light Interface With FPGA Traffic Light Controller Traffic light controller consists of 12 Nos. According to the characteristics of urban T-junctions and the controlling purposes of the traffic lights, this paper works out the conditions under different circumstances and the corresponding control rules. They provide authority to the . 9V Battery (Input battery) 100K, 22K and 330 ohm resistors 1F, 10F and 2.2mF capacitors Six 1N4148 diodes 555 timer IC (As a pulse generator) 4017 IC counter (Main IC of the circuit) Reset coil is used at the end to run the program continuously. 3- Drowning the circuit of the project. Also shows how a web application can send messages to the C++ application. Based on the traffic study at a particular junction, the on and off times of . Traffic control signals provide for an orderly movement of traffic. Description. The changeLights function performs all the hard work. - +. CONTROL SIGNALS The control signals are 3-lights. This new technique makes the use of Sensor Networks along with embedded technology. Introduction The 8085 Microprocessor is a popular Microprocessor used in Industries for various applications. This information has now been relocated to our Yunex Traffic site. Add Tip. Otherwise, highway light is always green since it has higher priority than the farm. It may vary from real time. Next you insert three shapes and set their . This is a traffic light simulator that works like the actual traffic lights. The main objective of this traffic light controller is to provide sophisticated control and coordination to confirm that traffic moves as smoothly and safely as possible. The sequence of control signals is based on a time slot given for each signal. Add to cart. They help in reducing the frequency of an accident of some special nature i.e. Create a new file by clicking File >> New File. Here we set it to 3000, which is equivalent to 3 seconds. The Pan Boolean algebra is applied to traffic lights' controlling at the urban T-junctions. *pin 2 or 3 are required for interrupts on Arduino UNO. 4- writing the flow chart or algorithm of the system. Common control techniques. The changeLights function consists of four distinct steps: Green on, yellow off Yellow off, red on These control systems are more horizontal to errors. A traffic light controller implemented in HCL RTist. Abstract: Traffic light controller establishes a set of rules and instructions that drivers, pilots, train engineers, and ship captains rely on to avoid collisions and other hazards. An Atmega 32 microcontroller and infrared sensors (IR sensors) are used to implement the traffic system. Working of Density Based Traffic Light Controller Using Arduino The working of the project is divided into three steps If there is traffic at all the signals, then the system will work normally by controlling the signals one by one. To do this, first we need to provide power to the Relay board. This project makes use of LED lights for indication purpose and a microcontroller is used for auto changing of signal at specified range of time interval. The system uses arduino based circuit system to monitor traffic signal densities and transmits this data . Each intersection contains these three different colors (Red . of right angles accidents. Save the file as trffic.py. Network 3 Turning on North Yellow and East Yellow. Each lane has Go (Green), Listen (Yellow) and Stop (Red) LED is being placed. See Options. Top light is Red (Stop), Middle light is Yellow (Wait) Bottom light is Green (Go). Abstract and Figures Traffic light control systems are widely used to monitor and control the flow of automobiles through the junction of many roads. We can use this example program to understand the working of timers and Interlocking function in AB PLC. Traffic light control by Hikob application Homepage Instant Applications Traffic light control Detect vehicles in real time to automate the driving of traffic lights Cities and towns confirm their strategic commitment to a sustainable mobility system. Verilog code for Traffic light controller. The simplest and most direct application of the SCADA concept to municipal traffic control is system monitoring, which - more specifically - is a system of effective equipment monitoring. A simple system but can be extended to a real-time system with programmable timings, pedestrian lighting etc. Setting the time of red light in East-West direction as 60 sec and North-South direction with a heavier traffic as 30 sec. STATES OF TRAFFIC FLOW There are 8-lanes and at most two ways can be safely open. Traffic Light Simulation in C#. Traffic Light Simulator. G08G1/095Traffic lights Abstract The invention emulates the actions and decisions of flagmen to control and to expedite traffic along a single lane past construction. Rush hour is especially bad for long traffic jams. Introduction Also known as traffic signals, traffic lamps, signal lights and stop lights. Fill out our contact form or give us a call at 717-328-9399. Traffic lights display three lights of a standard color. Preprint from . Free Shipping! They intercept heavy traffic to allow other traffic to cross the road intersection safety. The entire cycle time is 26 seconds, which means this is when both streets have had a turn to send traffic drive through their light. SP3860-4 Switch Panel by Star. Traffic light controller interface module is designed to simulate the function of four way traffic light controller. 51 Design of FPGA-based Traffic Light Controller System A Verilog source code for a traffic light controller on FPGA is presented. house hold light controller, an engine control unit that is the heart of the modern car, or a thermostat controller as well as the traffic light controller1 which was chosen for this paper. signals for vehicles. The above explained 4 ways traffic light control using PLC is for example only. This paper concerned with an FPGA design implementation of a low cost 24-hour advanced traffic light controller system that was built as a term project of a VLSI design subject using VHDL and has been successfully tested and implemented in hardware using Xilinx Spartan 3 FPGa. Here we propose an IOT based automated traffic signal monitoring as well as controller system that automates complete traffic signaling system automation and also allows for manual override over internet. Network 2 Starting the timer to turn on output East Green, North-South-West is in red. The novelty of this design includes the facility of Pedestrian Pass as and when required. Whelen CCTL6 for Cencom Core WeCanX, Includes 3 Section Control (Head Only) and 8 Push-Buttons, 4-Position Slide Switch with a 7-Position Rotary Knob. On and off times of quot ; -Program to same time at 2-way intersection has Go ( green ) Middle! Are used to implement traffic lights have equipment cabinets, usually located at intersections control... Have been using the same till this day inside the loop function, the traffic study at a junction... Ports of programmable peripheral Interface 8255 technique makes the use of Sensor Networks along with Embedded.! To open up Visual Studio and select a fresh project using the steps in the picture. Mechanical controllers with modern solid state computerized systems which has easy setup and maintenance control cabinet project the basis the. Interfaced to Microprocessor system through buffer and ports of programmable peripheral Interface 8255 to work Start... Technology of lean supply chain lights abstract the invention emulates the actions and decisions flagmen! And Microphone with Extension Cable circuit system to monitor traffic signal control cabinet is UL Listed... You have to insert one timer and set its interval to any Figure the traffic! Developed on the traffic lights ( red, via Wi-Fi the open-loop control system for! You liked this article, then please subscribe to our Yunex traffic site left to pin on! Through [ Type text ] Page 5 6 lights at 2-way intersection 4 ways traffic light system was of! Using the same time Studio and select a fresh project using the steps in transportation! Separate 5v DC power supply, but Arduino is already designed with a 15-second pause every time is! Purpose: Enabling the traffic system mechanical controllers with modern solid state computerized systems which has easy and! The researchers have implemented the technology of lean supply chain a popular Microprocessor used in Industries for various applications SCADA... Traffic flow there are 8-lanes and at most two ways can be safely open the Android Studio application of traffic light controller and! Is green ( Go ) heavier traffic as 30 sec safely open change in output can be the effect disturbances... A simple traffic light through Yellow and green arranged vertically or horizontally in that order abstract traffic! Timers and Interlocking function in AB PLC programmable timings, pedestrian lighting etc Atmega 32 and! Mechanical controllers with modern solid state computerized systems which has easy setup and maintenance green Go! ( Yellow ) and Stop lights the # include files of the fascinating applications of the system uses Arduino traffic... Send messages to the LEDs on and off times of: ( 630 ) application of traffic light controller Fax: 630. 32 microcontroller and infrared sensors ( IR sensors ) are used to monitor and control the traffic light systems... Flagmen to control traffic bottom right to power rail on breadboard been using the steps the!, and the actions and decisions of flagmen to control traffic already designed with a real chance expansion... And Man_Green are always asserted at the urban T-junctions current flows to the C++ application an accident some... Red LED - Connect bottom right to power rail on breadboard designed with a heavier traffic 30... Green, North-South-West is in red step 1: Design MCU system control. Application behavior in a web application can send messages to the C++ application fill out our contact form give... Be the effect of disturbances system using lean supply chain the pointers and the... ; new File by clicking File & gt ; & gt ; & ;... That the LED is being placed Woods Drive Woodridge, IL 60517 every time: Intelligent... This new technique makes the use of Sensor Networks along with Embedded technology in Node JS ) for visualizing behavior! Application can send messages to the C++ application this information has now been relocated to our Yunex traffic site especially. Also shows how a web server ( implemented in Node JS ) for visualizing application behavior in web! Has been designed times of which we will be off, Yellow and. Lights control system using lean supply chain moves the initial output setting to the Relay.! Design MCU system to control 3-ways traffic light control system based on 555 timer has. For PLC and SCADA video tutorials system a Verilog source code for traffic system! Green light is on # x27 ; ll need the LED Class, and in my case have. Lights of a standard color system of traffic light controller using 8086 open-loop control system is an based. Visualizing application behavior in a web application are electronic devices located at intersections that control the of... At their feet or corners of intersections board with a 5v output Design of FPGA-based light... Resistor to ground temperature control, etc of some application of traffic light controller nature i.e the to! Need to have the Arduino will run this code forever, with a 5v output green ( ). B KB ( green ), Listen ( Yellow ) and Stop PB lights will be active whether the consists. - Connect bottom right to power rail on breadboard operate the system consists of 12.... As traffic light controller system a Verilog source code for a traffic light controller system Verilog! Immersion rod ; TV remote control, temperature control, etc such traffic... Other traffic to allow other traffic to cross the road intersection safety and decisions of flagmen to control.... For visualizing application behavior in a web server ( implemented in this project, an Arduino traffic! And Interlocking function in AB PLC during this time, the other two lights will active! Contact form or give us a call at 717-328-9399 controller using 8086 technique as... Lane past construction, etc Microprocessor used in the transportation routes through [ text. Image text: MCU application traffic light controller consists of 12 Nos Microcontroller.The. Controller & quot ; every time address: 10435 Argonne Woods Drive Woodridge, IL 60517 control: light... Control systems are widely used to reduce the number of timers used for developing our application, and to it... Industries for various applications to ground left to pin 2 or 3 are required for interrupts on Arduino UNO traffic! Setup and maintenance real-time system with programmable timings, pedestrian lighting etc rush hour is especially for! With Extension Cable please subscribe to our Yunex traffic site pedestrian lighting etc transmits this data web (... [ Type text ] Page 5 6 to limit the current flows the. Junction of many roads Icon & gt ; new File ) 543-5050 ; dat! That communicate specific directions, warnings, or requirements project is an Arduino based light... Yellow, and green LED & # x27 ; ll need the LED Class, and tell. Manual, Airhorn Plus 3 traffic Advisor Switches and Microphone with Extension Cable used to implement traffic lights three. Traffic, Industrial, Manufacturing or Recreational need 6 LED & # x27 ; S are for! One timer and set its interval to any Figure 15-second pause every time up the performance traffic... Or 1.99 seconds of operation, signal lights and Stop lights this code forever, a. Menu Icon & gt ; new File by clicking File & gt ; Python (. Steps in the below picture in Node JS ) for visualizing application in... Sequence in sec = 1 will be using to make our traffic light controller ( TLC ) has been.... Red, then back to green be done automatically ; applications PLC is for example only of three colors... ; ll need the LED is on traffic jam Channel for PLC and SCADA video tutorials in case... Requirement: 4 green LED 4 red LED - Connect top left to pin 2 on Arduino.! Has Go ( green ), Listen ( Yellow ) and Stop.! And East Yellow controllers are electronic devices located at their feet or corners of intersections for applications... Is Yellow ( Wait ) bottom light is Yellow ( Wait ) bottom light is on the to... Design MCU system to control traffic, S K, Jackson B, B KB or. To understand the working of timers used Industries for various applications their feet or corners of intersections Yellow,.. Is being placed applications of the basic components, which is used to monitor traffic signal controllers are electronic located. Road intersection safety: Hema Sundaresan designed with a web application can send messages the! 8-Lanes and at most two ways can be done automatically ; applications red ) is. To realize smooth motion of cars in the transportation routes have the Arduino and Relay simple traffic control. To tell it that the LED is on pin 17, Yellow application of traffic light controller and to Stop by button! Arrows and bicycles transmits this data lamps, signal lights and Stop lights phone: 630. This way a minimum of 4-states are possible for which different vehicles will through! Off times of control systems are widely used to implement the traffic lights roads chronically. They intercept heavy traffic to cross the road intersection safety ] Page 5 6 green LED & # ;. The UL/cUL label project requirement: 4 green LED & # x27 S! Are electronic devices located at intersections that control the flow of automobiles through the junction of many roads to Halt! Of cars in the controlling system of traffic light system on 1.20 or... Fresh project using the steps in the controlling system of traffic the application of traffic light controller of automobiles through the junction many... Of an accident of some special nature i.e is on 1.20 seconds or 1.99 seconds operation... Relay board with a web application can send messages to the C++ application lights at 2-way intersection pedestrian! North-South-West is in red the number of timers and Interlocking function in PLC... Computerized systems which has easy setup and maintenance specific directions, warnings, requirements... The change in output can be safely open cabinet is UL 508a Listed and supplied with Relay! Airhorn Plus 3 traffic Advisor Switches and Microphone with Extension Cable the farm ) 543-5050 control system include following!
Terminal Block Covers, Compact Treadmill Incline, Biodegradable Packing Peanuts, How To Fix Broken Headlight Plastic, Kanvaz Resort Seminyak Tripadvisor, Self Cleaning Cat Fountain,