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Equipment Reminders

Equipment Reminders. Multimeters Wrenches Magnets D Cell Batteries Magnet Wire Wood Screw Sand Paper Frame & Belts Coils LED’s Alligator Cables Zip Lock Bags. Wind Belt Project Two in EGR111. Week 1 – Frame and Belt Construction Week 2 – Coil Construction

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Equipment Reminders

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  1. Equipment Reminders • Multimeters • Wrenches • Magnets • D Cell Batteries • Magnet Wire • Wood Screw • Sand Paper • Frame & Belts • Coils • LED’s • Alligator Cables • Zip Lock Bags

  2. Wind BeltProject Two in EGR111 Week 1 – Frame and Belt Construction Week 2 – Coil Construction Week 3 – Assembly and Tweaking Week 4 – Final Adjustments and Grading

  3. Neodymium-Iron-Boron Magnets • Neodymium magnets are the strongest permanent magnets known. They are sometimes used in hard drives. • The magnets that you are about to use were purchased from www.rare-earth-magnets.com for about 50 cents each.

  4. Magnet Safety • Children should not be allowed to play with magnets. Children should be strictly supervised by an adult when handling magnets. Children and adults should not ingest magnets or place magnets in any body orifice such the ear, nose or mouth. Ingestion of magnets is very hazardous. If magnets are ingested or aspirated to the lungs, immediate medical attention is required.

  5. Magnet Safety • Rare-Earth magnets are fragile and can break easily. These magnets will become demagnetized when exposed to high heat. These magnets are powerful and can accelerate at high speeds toward each other and toward ferrous material. When these magnets come together quickly, they can shatter and break sending particles at speed. These magnets can also pinch strongly if allowed to come together against the skin. You should always wear gloves and eye protection when handling large magnets. Very large magnets can pose a crushing hazard and should not be handled. • Pull force descriptions on this site are estimates based on ideal conditions and should not be used in application design. Variations in iron content, thickness, temperature and surface finish and condition will all reduce these ratings. Magnets should never be used to lift objects over people.

  6. Magnet Safety • Rare-earth magnets have strong magnetic fields that can damage electronic equipment and magnetic data storage media. You should keep these magnets away from electronic equipment, TV’s, monitors, computers, credit cards, video tapes, and other magnetic media.

  7. Magnet Safety • Neodymium rare-earth magnets should not be burned. These magnets can ignite and burn at high intensity. These magnets should not be drilled or machined. Drilling may cause high heat to develop resulting in ignition. The magnets may shatter and break when drilled. • Neodymium rare-earth magnets are subject to corrosion. Magnets that have corroded have changed their physical properties. The Material Safety Data Sheets (MSDS) for the component materials (Iron, Neodymium, Boron, Nickel, and Copper) should be consulted prior to the use, handling or transportation of corroded neodymium rare-earth magnets.

  8. Facilitator • Magnets in Pill Box (with your team number) • 1 Wood Screw • 1 D Cell Battery • 1 6-inch piece of magnet wire • 1 Sand Paper

  9. Magnetic Compass • Desktop Demo • Try to balance a disk magnet on its side in your desk. • Optional: Try to suspend a magnet from a thread.

  10. Lorentz Force Motor 1 Short Wire 1 D Cell Battery 1 Nail or Screw 1 Disk Magnet • Construct the simple motor shown in the figure. • Put the magnet on the head of your nail. • Touch the sharp end of the nail to the negative side of the battery. • Hold the wire to the positive side of the battery. • Lightly touch the wire to the edge of the magnet. • What are things that you can do to change the direction of the motor? • How can you increase the speed of the motor?

  11. Multimeters - Gatekeeper • Continuity • Open or Short • Beep • Voltage • AC or DC • ~ means AC • Frequency • Resistance • Current • Capacitance • Miscellaneous Functions Gatekeeper Recorder Note: The Hold button can be used to lock-in or remember a measured voltage or frequency value. Timekeeper Facilitator

  12. Project Two Grading (10pts each) • Does the wind belt function smoothly for at least 30 seconds? • Does an LED shine brightly when attached? • Is the coil attached to the frame well? • Does the magnet move regularly in the presence of the coil? • Is the coil neatly wound and maintained?

  13. Project Two Grading (25 pts each) • Peak Output Voltage (Goal > 4V) • Teams must use the AC (~) setting on the multimeter and press the Hold button to store values and show the instructor. • The Recorder must show the instructor 3 “held” values on Wednesday. • Frequency (Goal > 30Hz) • The Timekeeper must show the instructor 3 “held” values on Wednesday. Note: Project Two grades will not be available during class but will be posted online for review. Please do not ask for a Project Two grade during class.

  14. Gather Parts with your Team Number • Wrench • Multimeter • Frame and Belt • Coil • Magnets • LED’s These must be returned today at the end of class. Optional: One team member may take these home over the holidays.

  15. Today’s Plan • First, try to light your LED with the wind belt device. • Second, try to measure the AC (~) voltage and frequency with the multimeter using the Hold button. • Next, try different belt tensions and magnet placements to maximize your output voltage and frequency. • Last, find a time for one more team meeting before Wednesday of next week. Use this meeting to develop a method to attach the coil to the frame so that it does not shake.

  16. New Day

  17. Today’s Plan • Discuss the contents final exam. • User clickers to answer problems 19-26 from Homework 12. • Finish integrals on page 3 with help from me. • Attach the coil to the frame for partial grading today. • Plan one more meeting with your team between now and Wednesday if needed.

  18. Final Exam • See the Review Sheet online. • Focus on Chapter 10. • Focus on Homework 11 and 12. • Review all of the multiple choice questions from the in-class handouts. • Bring your book to the Exam on Monday at 1:00PM.

  19. Wind BeltProject Two in EGR111 Week 1 – Frame and Belt Construction Week 2 – Coil Construction Week 3 – Assembly and Tweaking Week 4 – Final Adjustments and Grading

  20. Project Two Grading (10pts each) • Does the wind belt function smoothly for at least 30 seconds? • Does an LED shine brightly when attached? • Is the coil attached to the frame well? • Does the magnet move regularly in the presence of the coil? • Is the coil neatly wound and maintained?

  21. EGR215 and PHY252 Wind Belt Circuit Additions Pair-up and locate the following: Wrench, Multimeter, Windbelt, Heathkit Board

  22. EGR215 & PHY262 • LED • Adjust the belt tension, magnet position, and coil so that the LED flashes when held in front of a fan. • Peak Output Voltage (Goal > 2.5V) • Teams must use the AC (~) setting on the multimeter and press the Hold button to store values and show the instructor. • Frequency (Goal > 45Hz) • Again use the Hold button to lock in the values and show your instructor.

  23. EGR215 & PHY262 • Dual LED’s • Now connect 2 LED’s in parallel so that they flash in an alternating fashion.

  24. EGR215 & PHY262 • Bridge Rectifier • Use 5 Diodes to rectify the output from the coil. Connect 1 LED across the bridge.

  25. EGR215 & PHY262 • Filter Capacitor • Connect a capacitor in parallel with you LED. • What capacitance gives you a steady light corresponding to a DC voltage?

  26. EGR215 & PHY262 • Half Wave Rectifier • Now try to use 1 LED, 1 Diode, and 1 Capacitor to perform the same task. • Now try to use 1 LED and 1 Capacitor to perform the same task.

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