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Senior Design I Project

Senior Design I Project. Spring 2007. Overview. Objectives Constraints Possible Components. Project 2 Objectives. To Design and build an audio processor Should be PC controlled Should perform Level Compression ALC (automatic Level Control) At least three band equalization Easy To Use

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Senior Design I Project

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  1. Senior Design I Project Spring 2007

  2. Overview • Objectives • Constraints • Possible Components

  3. Project 2 Objectives • To Design and build an audio processor • Should be PC controlled • Should perform • Level Compression • ALC (automatic Level Control) • At least three band equalization • Easy To Use • Economic • Simple Circuitry

  4. Compression

  5. PC Interface

  6. Interesting Links • http://www.soundonsound.com/sos/dec00/articles/adcompression.htm • http://www.barryrudolph.com/mix/comp.html • ftp://ftp.dbxpro.com/pub/PDFs/WhitePapers/Compression%20101.pdf • http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en010007 • http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en023602 • http://www.sparkfun.com/commerce/product_info.php?products_id=762

  7. Project 2 Objectives • To Design and build a Micromouse • Should be able to find its way through a maze • Maze details to be disclosed soon • Easy To Use • Economic • Simple Circuitry

  8. Micromice

  9. Interesting links • http://www.ece.ucdavis.edu/umouse/home/ • http://www.ewh.ieee.org/r6/lac/students/microm/MMRULES.html • http://www.robots-dreams.com/micromouse/index.html • http://www.robot-fan.net/modules/x_movie/x_movie_view.php?cid=1&lid=2

  10. Our Maze • Square size 6.5 • Matrix Size 13x6 or 13x10

  11. Projects Distribution • The number of teams working in the different projects must not differ for more than one

  12. Constraints • The projects will be based on the Microchip dsPIC30F4011 or dsPIC30F4013 microcontrollers • Project Should be completed by the presentation date indicated in the syllabus • Teams should be composed of three or four members. If there is a single person without team I will assign that person to a team of my choice.

  13. Extra Credits • There will be extra credits for: • First fully functional project • Best Accomplished project • Extra credit can range from 1 to 5 absolute points

  14. Components: GP2D120 • Sharp GP2D120 Analog Distance Sensor • http://www.roboticsconnection.com/pc-23-4-sharp-gp2d120-ir-sensor.aspxFeatures • Less influence on the color of reflective objects, reflectivity • Line-up of distance output/distance judgment type • Distance output type (analog voltage) GP2D120 Detecting distance 4 to 30cm • Recommended, buy the interconnect cable • GP2D120.pdf • $8.99

  15. Components: GP2D120

  16. Components: GP2D120 14,000 lx

  17. Stock#: 605-0005Melexis 90217 Hall-Effect SensorPrice:  $4.95 3/8 diameter, 1/8 thick NdFeB plate magnetPrice:  $0.79 Position Determination

  18. Position Determination • Thru Distance Sensors • Hamamatsu P5587 Wheel Encoder Modules + 30 Spoke Wheel 1.5” Encoder Disks or similar • http://www.roboticsconnection.com/c-4-robot-sensors.aspx • Combnation: $31.95

  19. Position Determination • ACE 128 Absolute Encoder • http://www.newark.com/jsp/Passives/Encoders/BOURNS/EAW0D-B24-AE0128/displayProduct.jsp?sku=04B9184 • $10.75

  20. Position Determination • Incremental Encoder • ECL1J-B24-BC0024 — BOURNS • http://www.newark.com/jsp/Passives/Encoders/BOURNS/ECL1J-B24-BC0024/displayProduct.jsp?sku=04B9197 • $4.26

  21. Type of Motors • “DC motors are widely used, inexpensive, small and powerful for their size. Reduction gearboxes are often required to reduce the speed and increase the torque output of the motor. Unfortunately more sophisticated control algorithms are required to achieve accurate control over the axial rotation of these motors. Although recent developments in stepper motor technologies have come a long way, the benefits offered by smooth control and high levels of acceleration with DC motors far outweigh any disadvantages.”

  22. Stepper Motorshttp://www.cs.uiowa.edu/~jones/step/ Unipolar Variable Reluctance Winding 1a 1000100010001000100010001 Winding 1b 0010001000100010001000100 Winding 2a 0100010001000100010001000 Winding 2b 0001000100010001000100010 Winding 1 1001001001001001001001001 Winding 2 0100100100100100100100100 Winding 3 0010010010010010010010010

  23. Stepper Motorshttp://www.cs.uiowa.edu/~jones/step/ Bifilar Bipolar Terminal 1a +---+---+---+--- ++--++--++--++-- Terminal 1b --+---+---+---+- --++--++--++--++ Terminal 2a -+---+---+---+-- -++--++--++--++- Terminal 2b ---+---+---+---+ +--++--++--++--+

  24. Stepper Torque • Stepper motors have the greatest torque at slower speeds and less torque as the motor speeds up. If the motors are started at full speed they will not move the mouse at all, the motors will simply "twitch" and the rotor will not rotate to the next position. In order to move the mouse, the motors must be accelerated to top speed. Likewise, in order to stop the mouse, the motors must be slowed down. A graph of the stepper's speed would look like this: • http://www.micromouseinfo.com/introduction/steppers.html

  25. Where to buy? • http://www.jameco.com/webapp/wcs/stores/servlet/KeywordSearchResultView?langId=-1&storeId=10001&catalogId=10001&searchType=k&searchValue=stepper&categoryId=351580&rscount=76 • http://www.allelectronics.com/cgi-bin/category/400600/Stepper_Motors.html

  26. Digital Potentiometerhttp://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en025082 • They don’t have a DIP package for the up/down versions. • I would suggest using the SOIC package and soldering some cables to the IC

  27. Components: 28015 • Parallax's new PING)))™ ultrasonic sensor provides a very low-cost and easy method of distance measurement. This sensor is perfect for any number of applications that require you to perform measurements between moving or stationary objects. • The PING)))™ sensor measures distance using sonar; an ultrasonic (well above human hearing) pulse is transmitted from the unit and distance-to-target is determined by measuring the time required for the echo return. • http://www.parallax.com/detail.asp?product_id=28015 • 28015.pdf

  28. Components: 28015 • Features • Supply Voltage: 5 VDC • Supply Current: 30 mA typ; 35 mA max • Range: 3cm to3 m( 1.2in to 3.3yrds) • Input Trigger: positive TTL pulse, 2 uS mm, 5 uS typ. • Echo Pulse: positive TTL pulse, 115 uS to 18.5 mS • Echo Hold-off: 750 uS from fall of Trigger pulse • Burst Frequency: 40 kHz for 200 uS • Burst Indicator LED shows sensor activity • Delay before next measurement: 200 uS • Size: 22 mm H x 46 mm W x 16 mm D (0.84 in x 1.8 in x 0.6 in • $24.95

  29. Components: 28015

  30. Components: 28015

  31. Components: 28015

  32. Components: Memsic 2125 Dual-axis Accelerometer • The Memsic 2125 is a low cost, dual-axis thermal accelerometer capable of measuring dynamic acceleration (vibration) and static acceleration (gravity) with a range of ±2 g • Key Features of the Memsic 2125: • Measure 0 to ±2 g on either axis; less than 1 mg resolution • Fully temperature compensated over 0° to 70° C range • Simple, pulse output of g-force for X and Y axis • Analog output of temperature (TOut pin) • Low current operation: less than 4 mA at 5 vdc • http://www.parallax.com/detail.asp?product_id=28017 • Memsic 2125.pdf • $ 29

  33. Components: Memsic 2125 Dual-axis Accelerometer • How It Works • Internally, the Memsic 2125 contains a small heater. This heater warms a "bubble" of air within the device. When gravitational forces act on this bubble it moves. This movement is detected by very sensitive thermopiles (temperature sensors) and the onboard electronics convert the bubble position [relative to g-forces] into pulse outputs for the X and Y axis. • The pulse outputs from the Memsic 2125 are set to a 50% duty cycle at 0 g. The duty cycle changes in proportion to acceleration and can be directly measured by the BASIC Stamp. Figure 2 shows the duty cycle output from the Memsic 2125 and the formula for calculating g force.

  34. Components: IR Transmitter Assembly Kit • FEATURES • D= 940 nm • Chip material = GaAs • Package type: T-1 (3mm) • Matched Photosensor: QSC112 • Narrow Emission Angle, 24° • High Output Power • Package material and color: Clear, peach tinted plastic • http://www.parallax.com/detail.asp?product_id=350-00017 • QEC112.pdf • $2.40

  35. Components: IR Transmitter Assembly Kit

  36. Components: PNA4601M Infrared Receiver • Features • Extension distance is 8 m or more • External parts not required • Adoption of visible light cutoff resin • For infrared remote control systems • $3.95 • http://www.parallax.com/detail.asp?product_id=350-00014 • PNA4601M.pdf • PNA4601Mapp.pdf

  37. Components: PNA4601M Infrared Receiver

  38. Components: PNA4601M Infrared Receiver

  39. Components: PNA4601M Infrared Receiver

  40. Componebts: Infrared Transistor #: 350-00018 • A phototransistor is a light-sensitive device similar to other transistors which act as current amplifiers, except that it converts visible light, or photons, to current which is then amplified. • http://www.parallax.com/detail.asp?product_id=350-00018 • $1.29

  41. http://www.robotroom.com/HBridge.html

  42. Components: TC4421/TC4422 • Features • High Peak Output Current: 9A • Wide Input Supply Voltage Operating Range: 4.5V to 18V • High Continuous Output Current: 2A Max • Fast Rise and Fall Times: • 30 ns with 4,700 pF Load • 180 ns with 47,000 pF Load • Short Propagation Delays: 30 ns (typ) • Low Supply Current: • With Logic ‘1’ Input: 200 µA (typ) • With Logic ‘0’ Input: 55 µA (typ) • Low Output Impedance: 1.4 (typ) • Latch-Up Protected: Will Withstand 1.5A Output Reverse Current • Input Will Withstand Negative Inputs Up To 5V • Pin-Compatible with the TC4420/TC4429 6A MOSFET Driver • Space-saving 8-Pin 6x5 DFN Package • http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010665

  43. Components: TC4421/TC4422

  44. Components: TC4421/TC4422

  45. Components:Parallax (Futaba) Continuous Rotation Servo: 900-00008   • Technical Specifications • Power 6vdc max • Average Speed 60 rpm, Note: with 5vdc and no torque • Weight 45.0 grams/1.59oz • Torque 3.40 kg-cm/47oz-in • Size mm (L x W x H), 40.5x20.0x38.0 • Size in (L x W x H), 1.60x.79x1.50 • Manual adjustment port • www.parallax.com • continuous rotation • $6.95 • http://www.parallax.com/detail.asp?product_id=900-00008 • crservo.pdf

  46. Components:Parallax (Futaba) Continuous Rotation Servo: 900-00008  

  47. Overview • Objectives • Constraints • Possible Components

  48. & Questions Answers

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