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A Presentation of Random Material in a Nonsensical Order

A Presentation of Random Material in a Nonsensical Order. By Benjamin Kidd. The DPDT Reversing Circuit. How do we switch polarity using a DPDT switch?. The Knife Switch: A Simple DPDT. DPDT Reversing Circuit.

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A Presentation of Random Material in a Nonsensical Order

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  1. A Presentation of Random Material in a Nonsensical Order By Benjamin Kidd Benjamin W. Kidd - ENGR-162/12

  2. The DPDT Reversing Circuit How do we switch polarity using a DPDT switch? Benjamin W. Kidd - ENGR-162/12

  3. The Knife Switch: A Simple DPDT Benjamin W. Kidd - ENGR-162/12

  4. DPDT Reversing Circuit • The Double Pole, Double Throw (DPDT) switch allows us to choose which direction a DC current flows into the load. From DC Power Source To Load Benjamin W. Kidd - ENGR-162/12

  5. DPDT Reversing Circuit Benjamin W. Kidd - ENGR-162/12

  6. DPDT Reversing Circuit Benjamin W. Kidd - ENGR-162/12

  7. Diodes • Diode – A semiconductor device which acts as an electrical “one-way valve”. Diodes only pass current in one direction, namely from their cathode to their anode. 1N4002 Rectifier Diode Benjamin W. Kidd - ENGR-162/12

  8. Diode Ratings • What to look for: • Type – Rectifier*, Small Signal, Zener • PIV – Peak Inverse Voltage – The maximum voltage at which the diode can be used (Remember, Peak NOT RMS for AC Circuits). • Maximum Average Forward Rectified Current – The continuous value amount of current that the diode can withstand. • Peak Forward Surge Current – The short term amount of current the diode can withstand. *The Rectifier diode will probably be the most useful in this class Benjamin W. Kidd - ENGR-162/12

  9. Bridge Rectifier • Bridge Rectifier – A combination of four (4) rectifier diodes which rectify AC into DC. Bridge rectifiers can be made from four individual diodes or purchased as a package. Benjamin W. Kidd - ENGR-162/12

  10. AC Rectification • Half Wave Rectification – Passes only positive (or negative) half of AC Sine Wave • Full Wave Rectification – Changes AC into “pulsating” DC Benjamin W. Kidd - ENGR-162/12

  11. AC/DC Application • Simple 2-Step Lamp Dimmer (Warning – Only Works on loads that work on both AC and DC!) • When switch is closed, the diode is shorted and circuit operates at full 120VAC RMS. When switch is open, current is forced to flow through the diode, and the load only see’s half of the sinusoidal voltage. Benjamin W. Kidd - ENGR-162/12

  12. DC Application • This circuit allows the control of two devices (loads) using only two wires with diodes located at the devices. Normally, this type of circuit would require three wires. Benjamin W. Kidd - ENGR-162/12

  13. Making the Connection How to interconnect air systems reliably Benjamin W. Kidd - ENGR-162/12

  14. Making the Connection • How do I put an air connector on a hose? Benjamin W. Kidd - ENGR-162/12

  15. Knowing your Connectors • I use the ¼” NPT connection for my demonstrations in class. Benjamin W. Kidd - ENGR-162/12

  16. Making the Connection • Start with a Hose “Barb” connector, hose clamp, and hose end. Benjamin W. Kidd - ENGR-162/12

  17. Making the Connection • Put the clamp around the hose. Then, push the barb into the hose. (Important Note: Hose barb will not come out of hose after being pushed in – like a fishhook.) Benjamin W. Kidd - ENGR-162/12

  18. Making the Connection Benjamin W. Kidd - ENGR-162/12

  19. Tighten the hose clamp with a screw driver until screw is hard to turn. Benjamin W. Kidd - ENGR-162/12

  20. Making the Connection • Finished connection Benjamin W. Kidd - ENGR-162/12

  21. Connecting to Air • Prepare Connection with “Teflon” Tape. Wrap tape around threads leaving the first couple threads bare. Benjamin W. Kidd - ENGR-162/12

  22. Connecting to Air • Screw Connections together. Wrench-tight connections are the most leak-proof, but do not overtighten. Benjamin W. Kidd - ENGR-162/12

  23. Connecting to Air • Hmm…Gee Benjamin, this looks like this takes a lot of time. Benjamin W. Kidd - ENGR-162/12

  24. Using Quick Connectors • Quick Connectors allow rapid connection to air supplies, accessories, and hoses. Female Connector Male Connectors Benjamin W. Kidd - ENGR-162/12

  25. Using Quick Connectors • Quick connectors attach to accessories and hoses using the normal “slow connect” connectors. Prepare the connection threads as before with Teflon tape. Benjamin W. Kidd - ENGR-162/12

  26. Using Quick Connectors • Wrench tighten to threaded connectors. Benjamin W. Kidd - ENGR-162/12

  27. Using Quick Connectors • Walla! Benjamin W. Kidd - ENGR-162/12

  28. Solenoid Controlled Pneumatics (Or Hydraulics) Using the “SV-2” Solenoid-valve to control air flow. Benjamin W. Kidd - ENGR-162/12

  29. Solenoid Controlled Air ¾” “Garden Hose” Thread To 3/8” Barb All Electronics SV-2 Solenoid Controlled Valve Benjamin W. Kidd - ENGR-162/12

  30. Solenoid Controlled Air • Connect ¾” to 3/8” Hose Barb connector to air hose. Screw connector to input port of solenoid valve. (Suggestion: Prepare input port threads of valve with Teflon tape.) Benjamin W. Kidd - ENGR-162/12

  31. Efficient Control Wiring Or…How to not have spaghetti in front of the stage. Benjamin W. Kidd - ENGR-162/12

  32. Efficient Control Wiring Benjamin W. Kidd - ENGR-162/12

  33. Efficient Control Wiring Benjamin W. Kidd - ENGR-162/12

  34. Efficient Control Wiring Benjamin W. Kidd - ENGR-162/12

  35. Efficient Control Wiring Benjamin W. Kidd - ENGR-162/12

  36. Efficient Control Wiring Benjamin W. Kidd - ENGR-162/12

  37. Efficient Control Wiring Benjamin W. Kidd - ENGR-162/12

  38. Efficient Control Wiring Grid Outlet Control Position Benjamin W. Kidd - ENGR-162/12

  39. Efficient Control Wiring Benjamin W. Kidd - ENGR-162/12

  40. Using Relays Why did you bother mentioning these things, anyway? Benjamin W. Kidd - ENGR-162/12

  41. Simple Relay Circuit for 120VAC Benjamin W. Kidd - ENGR-162/12

  42. Simple Relay Circuit for 12VDC Benjamin W. Kidd - ENGR-162/12

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