Final Report TiiCH - Wichita State University
Contents
1. Figure 4 1 12 Side View Rear Projection Dimensions Page 25 WICHITA STATE UNIVERSITY 4 1 6 Product Enclosure Box IR Filter Opening for Arduino Cable a Front View b Back View A gt C Side View Figure 4 1 13 Enclosure Box Dimensions We took a regular black product enclosure box from radio shack and cut out the necessary details so that our infrared camera would rest promptly in the box while being full functional Page 26 WICHITA STATE UNIVERSITY 4 2 Bill of Materials Bill of Materials For Infrared Camera Quanitity Part MEG Part Source Price Description Number Per Unit 25MHz CTS MX045 http www arrownac com 3 35 Crystal 25M000 Oscillator 0 Camera F2 4 EN ad RR jp Shield UNO Prrojects 328 Enclosure Shack 1802 Box er pun ewe qe Resistor Shack 1325 Resistor Shack 1339 1 1 1 1 1 2 1 1 100nF Radio 272 Radio Shack 0 28 Capacitor Shack 1053 po Tote Page 27 WICHITA STATE UNIVERSITY Bill Of Materials For Infrared Glove Quantity Part MEG Part Source Price Per Description Number Unit Shop LED Shack NN URN d Battery Battery Shack Radio Shack 1 99 Holder Lo S tas 1247 Bill Of Materials For Rear Projection Mount Quantity Part MEG Part Source Price Per Description Number Unit 10 15 PVC N A Lowes 1 11 Pipe N A A 12 Elbow Joint Joint 0 28 www eplast2. WICHITA STATE 1i UNIVERSITY THCH Interactive Whiteboard By Kevin Nguyen Ashan Amaranayake Jitendra Khadka Mahesh Dalpathado EE585 EE595 SENIOR DESIGN Wichita State University Page 1 WICHITA STATE UNIVERSITY Table of Contents TABLE OF CONTENTS CDD EUN potins 2 L0 INTRODUCTION aaa cQ Sw EE Ec E vaewtinas 3 JE CER ASAD 3 UU PROIECESCOLDB ccce GUI DAN DRE OR a nm medion on 4 AND DBNEETLS aan au ue 4 du ROOF OF CONGR T iussit nn pO 5 2 3 9B TOBADIDL E PP RER UI DEL UM UI OU UAE 6 ZU NHANH IE LE ha ose JO USER MANUA V pt 7 sL ERODUCTINSTRUGTHON Sepici dere Oecum tm 7 3 1 1 HOW TO SET UP REAR PROJECTION 7 3 1 2 HOW TO SET UP TUCH SYSTEM a au 17 MA TROUBLESHOOTING perenes M 17 4 0 PRODUCT INFORMATION irspons nniskkkix bistro REEOPERKVRC E ES EN sense enr 18 AS 18 Ai LL INFRARED PE N ne ee ee on eos 18 Ak LA INFRARED GLOV E siue ed ee 20 4 1 3 INFRARED CAMERA WITH 4 PIN OSCILLATOR 21 4 1 4 INFRARED CAMERA WITH 2 PIN OSCILLATOR 23 4 1 5 REAR PROJECTION 24 4 1 6 PRODUCT ENCLOSURE BU X
3. The projector will bounce the image off of the mirror eliminating half the space necessary to create a big image The infrared camera will be pointed at the screen and connected to the user s laptop Once that is done the user may start TIICH callibrate the software and enjoy our TIICH system Page 5 WICHITA STATE UNIVERSITY 2 3 Serviceability Our product is easily serviceable considering there are minimum parts that are used in our TIICH system Our infrared camera is in a box so the parts that make up the infrared camera shouldn t get loose or disconnected from user s everyday use The rear projection mount is sturdy enough so the mount should survive any type of use the user puts the mount through Users may have check the infrared pen Checking to see if the LED is working by using a camera to look at the LED when turned on to see if the batteries are not dead A user could also lose a part to the rear projection mount This wouldn t be something the user couldn t service him or her self Calling in for the part through the company would allow an easy way of reaplcing the part 2 4 Reproducability Our design is simple enough where companies can reproduce our product with ease Our rear projection is quite a simple design Having a simple design makes the rear projection mount easily produced through a assembly line The LED pen has a simple design as well With a battery and a infrared LED that is connected with wir
4. is the smaller of the two 6 Solder an 8 inch length of black wire to the negative lead 7 Thread the wires through the body of the pen and use a set of pliers to screw the LED into the tip of the pen 8 Fish the black wire through the hole for the pushbutton 9 Snipthe wire about an inch from the hole and then solder that to one terminal of your pushbutton Page 17 10 11 12 13 14 WICHITA STATE 3 UNIVERSITY Slip the remaining black wire back into the pen body and solder it to the other pushbutton terminal Gently set your pushbutton into place Solder the battery holder wires to those of the pen red to red Slide the battery and wire into the back of the pen and push the end cap back on as far as it ll go comfortably Test out the pen Note that the IR LED is invisible to the eye but it IS visible to the CCD of digital cameras Point your camera at the light press the button and you should be able to see it light up on the camera s screen Infrared Pen Fig 4 1 2 Page 18 WICHITA STATE UNIVERSITY ee eo 4 1 2 Infrared Glove stent 9 0 Ile e 5 P Na v 3 INC 4 wied a ame el CUTEM et am RES Tue 0 9 9 0 3x Oa AME ORA n hr b CE u E Aluminium Foil Switch HIGH OUTPUT IR LED Infrared Glove Schematic Fig 4 1 3 Our first goal was to make an infrared glove
5. 6 p p wee 57 Arduino A5 6 IR Camera Pins 1 3V 2 Ground 3 Ground 4 No Connection 5 Arduino Pin A6 6 Arduino Pin AS T 7 4 Pin Oscillator 8 Resistor and Capacitor Figure 4 1 8 Four Pin Oscillator Schematic This is the schematic that we used in order to build are infrared camera on our arduino shield breadboard The final product should look like figure 4 1 9 Page 21 WICHITA STATE UNIVERSITY Infrared Camera w Arduino Shield Using Four Pin Oscillator Fig 4 1 9 Page 22 WICHITA STATE UNIVERSITY 4 1 4 Infrared Camera With 2 Pin Oscillator Arduino Arduino 1 Vee 3 3 Los 3 ND 3 GND 4 no connection 5 SCL DC BUS 6 SDA DC BUS 7 CLK 25MHz 8 SRESET brounda Bus Pins 1 Ground 2 Arduino Analog 5 Vl Camera Pin 5 4 Ground amp No Connection 6 Camera Pin 6 7 Arduino Analog 6 8 SV supply Two Pin Oscillator w i2c Bus Schematic Fig 4 1 10 On our initial try we attempted to make our infrared camera using a two pin oscillator with an i2c bus which you can find the schematic for it in fig 4 1 10 We couldn t get the right 25Mhz oscillating so we had to find a four pin oscillator for our infrared camera Page 23 WICHITA STATE UNIVERSITY 4 1 5 Rear Projection Mount 32 Figure 4 1 11 Front View Rear Projection Dimensions Page 24 WICHITA STATE UNIVERSITY
6. asinieonvicesppY rens ebrii cda cene 26 BILLS OF MA ERA a ete 27 SCOR M ie 29 AA REVISION HISTORY dec 29 Z5 INDUSTRY STANDARDS 30 TO PATENT RESEARCH cerca 30 A CADETTI ER EN E E E 30 DO PROD ES OMR Rene ane 31 Page 2 F WICHITA STATE UNIVERSITY 1 0 Introduction 1 1 Purpose Imagine having an interactive whiteboard in every single classroom An interactive whiteboard sounds expensive which they currently are Our TIICH interactive whiteboard on the other hand is very inexpensive compared to the current products that are being sold today Costing only around 285 while SMART boards cost around 2000 Our system consists of a portable rear projection as well as an infrared sensor infrared LED pen and infrared glove Page 3 WICHITA STATE UNIVERSITY 2 0 Project Scope Our TIICH system is based off of the SMART board We are trying to compete with the SMART board by having our system being cheaper and portable Interactive Products 2 1 Features and Benefits While a SMART board is going to cost around 2000 or even more our TIICH system will only cost around 145 Including the projector the system will cost around 285 Our TIICH system cost almost a tenth of the price of a SMART board SMART boards are supposed to be mounted on a wall and stationary our TIICH system is portable By using a portable rear projection screen mount and projector a user can easi
7. es and controlled by a switch The hardest item to reproduce would be the infrared camera We got our infrared camera from a broken Wii remote that we bought off of eBay because we found out that was the cheapest way of acquiring an infrared camera If a company could get contracted by the same company that Wii gets their infrared camera from for a similar price this would make reproducing the camera much easier and cheaper Other then that the circuit design for this infrared camera is simple so it would be easily reproducable Page 6 WICHITA STATE UNIVERSITY 3 0 User Manual 3 1 Product Instruction 3 1 1 How To Set Up The Rear Projection To setup our TIICH system the user would have to set up their projector and projection screen so everything is projected right Shown here Figure 3 1 1 First the user must set up the base of the rear projection mount The joints will be labeled so the user must match the joints and the pipes to the right assigned spots Be on the lookout for the letter and number on each side of the pipe before connecting a certain letter and number to the corresponding joint Page 7 2 63 WICHITA STATE WSU University Figure 3 1 2 The user must place the pipes that are labels with a letter and number to the corresponding joint with same corresponding letter and number As seen in Figure 3 1 2 which in this case all of the pipes labeled A2 will go to joint JA2 Follow
8. he other side Page 13 WICHITA STATE UNIVERSITY Figure 3 1 11 After building the rear projection mount securely fasten the white cloth to the designated spots on the rear projection Each side of the white cloth should be specified i e top bottom etc Now place the Plexiglas securely on the middle section seen in figure 3 1 11 Then the user can place his or her projector and laptop on top of the rear projection mount Once the projector is set up the user may place the mirror onto the rear projection mount like in figure 3 1 11 Once mounted the mirror must be adjusted accordingly so that the image displayed will fit appropriately on the projection screen seen in figure 3 1 12 Page 14 WICHITA STATE UNIVERSITY Figure 3 1 12 After setting the rear projection mount up and the projection screen should look figure 3 1 12 Page 15 1 WICHITA STATE UNIVERSITY 3 1 2 How To Set Up TIICH System Figure 3 1 13 Calibration Screen The user must now point the infrared sensor right at the rear of the projection screen Then the user can open up the TIICH program and press calibrate Now use the infrared pen and calibrate the system by touching the targets like in figure 3 1 13 at each four corners of the screen The TIICH system should now work and you may use your infrared pen just like a mouse would act 3 2 Troubleshooting If the infrared LED pen tracking seems to be slightly off the
9. ics com 21 32 N pf Tota 6269 Mirror 12 Pack 3M Velcro 24 x48 Plexiglas 32 String int White Cloth N A Walmat 82 99 EN NEN NEN Page 28 WICHITA STATE UNIVERSITY Bill Of Materials For Infrared Pen Quantity Part MFG Part Source Price Per Description Number Unit Infrared Radio 276 143 Radio Shack 1 99 LED Shack 1 Pushbutton Radio 275 1548 Radio Shack 1 60 Switch Shack Highlighter Walmart 0 30 Batter Battery Shack Radio Shack 1 19 Holder Total 758 Final Total of TIICH 148 06 4 3 Code You can find the code for our TIICH system here https skydrive live com cid 21CO5BE685F8FE5B amp id 21CO5BE685F8FE5B 21 4 4 Revision History Revision Description Infrared laser sensors to Figured that the system March 10 2011 ultrasonic sensor system would use too many infrared lasers and it would be too expensive Ultrasonic sensor to Found this system will be April 2 2011 infrared sensor and LED even less expensive and system more accurate Page 29 WICHITA STATE UNIVERSITY 4 5 Industry Standards Our product has not been tested for industry standards yet But our system shouldn t interfere with any systems that are near it nor should the system harm your operating system on your laptop when being used From the normal testing usage that we have done with TIICH we haven t had any problems when using the
10. ly pack up our system pack it in their car and take it anywhere they want to use it We re targeting teachers with our product We re trying to build a system that is inexpensive as well as an effective teaching aid for classrooms use Our TIICH system will allow more schools to be able to afford interactive whiteboard which allows teachers the ability to write notes for their students with ease This would allow teachers to save their notes after the class is over and easily post them on blackboard or any type of server over the Internet for their students Page 4 WICHITA STATE UNIVERSITY ee eo 2 2 Proof of Concept Our TIICH system operates by having an infrared camera tracking the movements of an infrared LED This lets you use the LED as a mouse for your computer when you connect it to our system For the LED we designed an infrared pen This will let teachers write move items etc comfortably We re going to use PowerPoint to let teachers write notes We wrote a code for the macros on PowerPoint so teachers can easily switch to different color pens use highlighters erase go to next slide etc Allowing to teachers to freely write notes for their students how they please IR Pen Projector TiiCH IR Camera User Mirror Figure 3 2 1 Figure 3 2 1 is to give just an idea of how our system would work The user will set up the rear projection mount and place the items accordingly like figure 3 2 1 displays
11. roblems with our system when everything was properly set up Page 30 WICHITA STATE UNIVERSITY 5 0 Product Summary This TIICH system is designed to eliminate the use of chalkboards and whiteboards Letting teachers fully enter the electronic world but at a minimal cost We wanted to let teachers teach their class write their notes and at the end of the day post those notes if teachers wanted to Allowing students to focus more in class rather than just focusing on writing their notes TIICH has an unlimited possibility with the software that could be coded for this system Potentially allowing teachers in elementary school levels teach with a more visual and appealing way where they grab the attention of his or her students Page 31
12. software for TIICH on our laptops nor has the infrared camera cause and problems with and other systems around it This is just observations during our testing phases More testing needs to be done when the system if fully functional to make sure it fits the industry standards 4 6 Patent Research A significant amount of research has been done on patents for our product on http www google com patents There is currently nothing that is exactly what our system has to offer There are many products that are similar to our TIICH system but they re not accounting for the scenarios our TIICH system aims to fill A product called SMOOTH board gives only the software for users to buy and install on their laptops Other companies offer similar software but add a Wii remote mount for the Wii remote and an infrared pen There currently isn t and product our there that has made their own infrared camera and includes a rear projection mount like TIICH has to offer 4 7 Liability The user is reliable for setting up the rear projection mount properly Users are reliable for securely fastening the joints and connecting each piece of the rear projection mount securely TIICH is not reliable for any accidents that are caused neither from our system nor from the user TIICH does not guarantee that the rear projection mount will hold for a long period of time if the user does not secure the pieces properly Throughout testing our system there were no p
13. the same procedure for the other side with the corresponding letter and number m m 2 cmm ME Figure 3 1 3 This is the top view of the same joint in figure 3 1 2 Page 8 SE WICHITA STATE UNIVERSITY Figure 3 1 4 Now the user will just follow the same procedure for the mirror section of the mount Figure 3 1 5 In this case the user must place the pipe labeled A3 and C1 to JA3 and JC1 Follow the same procedure for the other side but with the corresponding letter and number Page 9 SE WICHITA STATE UNIVERSITY Figure 3 1 6 This is a side view of what the frame should look like for figure 3 1 5 Figure 3 1 7 Now the user will add the mount for the projection screen that we will later install Page 10 WICHITA STATE UNIVERSITY Figure 3 1 8 Follow the same procedure as before Place the pipes in the corresponding joint with the same labeling Figure 3 1 8 is what the mount should look like on one side of the mount Page 11 WICHITA STATE UNIVERSITY Figure 3 1 9 Now we will add the projection screen onto the rear projection mount Follow the same procedure for building the projection screen Page 12 WICHITA STATE UNIVERSITY Figure 3 1 10 Once the projection screen is built the user will connect the projection screen to the mount with the joints JG1 and JG2 with a pipe labeled G2 on one side and G1 on t
14. user would just have to recalibrate the system This may happen if the infrared camera is slightly moved mount got slightly bumped or something in that nature where the calibration is slightly off If the user finds that there is a continuous mouse click even when the LED pen isn t turned on the user may have to end task or force quit the TIICH system depending if the user is using Mac or a Windows based laptop If that doesn t work a quick restart of the laptop will fix it We haven t been able to use our system for a long period of time so we have no idea how the system would work when used continually for like a year But over our testing period we found that our TIICH system works pretty well with just some minor bugs Page 16 WICHITA STATE UNIVERSITY 4 0 Product Information 4 1 Schematics 4 1 1 Infrared Pen Momentary Switch Anode Battery LED Cathode Infrared LED Pen Schematic Drawing FIG 4 1 1 Directions to make the infrared pen 1 Getanytype of marker 2 Wipe out the inside of the marker to remove any remaining ink 3 Drill a quarter inch hole for the pushbutton switch at the spot where your thumb naturally rests on the grip 4 With a fine piece of sandpaper scuff up the surface of the LED this helps diffuse the light to improve tracking 5 Solder an 8 inch length of red wire to the positive lead which is the longer one you can also tell by looking inside the bulb the positive electrode
15. which would be one of the input devices in our system Shown in the Current System Diagram We used a regular golf glove for this task For the switch we used two Aluminum pieces as our switch How the glove works This glove runs on a battery with a switch to turn the infrared LED on and off This switch is turned on when you touch your middle finger and thumb together and turning it off when you release Your middle finger and thumb has wires running up the glove where we have aluminum foil for easier connectivity You can see how this glove was made from the schematic Fig 4 1 3 0 t Infrared Glove Fig 4 1 4 Page 19 WICHITA STATE UNIVERSITY 4 1 3 Infrared Camera With 4 Pin Oscillator We got our infrared camera from a broken used Wii remote from eBay We disassembled the Wii remote to gain access to the infrared camera After getting the circuit board for the Wii remote we desoldered the infrared camera from the board by heating the solder at a moderately high temperature and melt away the solder that was holding the infrared camera in place Once the solder was melted we just pulled the infrared camera right off Then we soldered our own wires to the camera in order to hook the camera up to the breadboard for our arduino shield Disassembled Wii Remote Fig 4 1 5 Desoldered Infrared Camera Fig 4 1 6 Rewired Infrared Camera Fig 4 1 7 Page 20 WICHITA STATE UNIVERSITY Arduino A
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