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Component Symbols & Information

Component Symbols & Information. Prof. Dr. Moustafa M. Mohamed Vice Dean, Faculty of Allied Medical Science, Pharos University in Alexandria. Connectors. Connectors – Termination devices for wires or cables. Plug = Probe = Male Contact. Jack = Receptacle = Female Contact.

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Component Symbols & Information

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  1. Component Symbols&Information Prof. Dr. Moustafa M. Mohamed Vice Dean, Faculty of Allied Medical Science, Pharos University in Alexandria

  2. Connectors • Connectors – Termination devices for wires or cables. • Plug = Probe = Male Contact. • Jack = Receptacle = Female Contact.

  3. Connectors (cont.)Types • 1/8” or ¼” DIN/guitar style • RCA or phono style • Terminal Block • PC Board Edge Card • Banana Style • Power/wall plug style

  4. Generic Plug 1/8” – ¼” DIN plug RCA/Phono Plug Generic Jack 1/8”-1/4” DIN Jack RCA/Phono Jack Connectors (cont.)Graphic Symbols

  5. Connectors (cont.)Lead Styles • Wire Lead • Eyelet • PC-Mount

  6. Connectors (cont.)Values/Ratings • Amperage • Voltage • Insulation/breakdown factors • Reference Designation: • Jacks = J • Plugs/probes = P

  7. Conductors and Cables • Conductors and Cables - Used to make connections

  8. Conductors and Cables (Cont)Types • Hookup Wire – Solid, stranded • Coaxial Cable – Shielded, unshielded • Twisted Pair – Shielded, unshielded • Multiconductor Cables – Round, flat, shielded, unshielded

  9. Conductors and Cables (Cont.)Value/Ratings • Amperage • Voltage • Insulation/Breakdown properties • Reference Designation = W

  10. Voltage Sources • Direct Current (DC) • Types • Battery • Single-cell • Multi-cell • Values/Ratings • Voltage • Ampacity • Amps/hour • CCA

  11. Voltage Sources (Cont) • Alternating Current (AC) • Types • Generator • Transformer • Values/Ratings • Voltage • Amperage • Reference Designation: • E or V • I

  12. Protection Devices • Protection Devices – Used to protect circuits from excess current flow

  13. Protection Devices (Cont.)Types • Fuses • Slow Blow • Fast Blow • Circuit Breakers • Slow or fast blow • Manual • Thermal • Magnetic

  14. Protection Devices (Cont.)Lead Styles • Wire • Eyelet • Cartridge Ends • Cartridge Tabs

  15. Protection Devices (Cont.)Values/Ratings • Current Limits • Voltage Applications • Reference Designation: • Fuses = F • Circuit Breakers = CB

  16. Protection Devices (Cont.)Graphic Symbols • Fuse • Circuit Breaker

  17. Input Devices • Input Devices – Used to input a signal to a circuit

  18. Input Devices (Cont.)Types • Antennas • Microphones • Sensors • Connectors

  19. Input Devices (Cont.)Lead Styles • Wire • Eyelet • PC-Mount • Surface Mount • Cartridge Ends

  20. Input Devices (Cont.)Values/Ratings • Resistance/Impedance • Frequency • Voltage • Current • Sensitivity • Reference Designation: • Antenna = E • Microphone = MK

  21. Input Devices (Cont.)Graphic Symbols • Antennas • Microphone

  22. Output Devices • Output Devices – Used to display or produce circuit output signals

  23. Output Devices (cont.)Types • Displays • CRT • LED • LCD • Drivers • Tape Heads • Loud Speakers • Piezoelectric cells • Buzzers • Bells

  24. Output Devices (Cont.)Values/Ratings • Resolution • Brightness • Wattage • Decibels • Frequency • Reference Designation: • Displays: CRT, LED, LCD • Drivers: LS, DS

  25. Output Devices (Cont.)Graphic Symbols • Cathode Ray Tube • Loud Speaker

  26. Ground Connections • Ground Connections – Used for common circuit return connections.

  27. Ground Connections (Cont)Types • Earth • Chassis • Common

  28. Schematic Diagram Drafting Guidelines (Cont.)Suggested Steps (Cont.) • Review/Revise the rough draft • Signal flow • Components: • Symbols • Polarities • Values • Connections • Notes • Create Final Draft

  29. Drafting Suggestions • Allow for balance, and spacing considerations when placing individual components. • Allow space for reference designations when placing individual components.

  30. Schematic Diagram Construction Steps • Layout inputs on left, and outputs on right. Sketch main components (Transistors, I.C.’s), then • Sketch support components (Resistors, capacitors), and finally • Sketch coupling components (Capacitors, diodes) • Sketch supply connections and input/output connections. • Sketch horizontal and vertical interconnection lines. • Use minimal bends/dog legs. • Use minimal crossovers. • Use uniform spacing.

  31. Schematic Diagram Construction Steps (Cont.) • Sketch reference designations (required) • Use standard reference designations. • Label to the right or above component. • Sketch Component values (optional) • Nominal rating • Tolerance • Power rating • Review, revise, finalize

  32. Schematic DiagramDo’s and Don’ts

  33. Reading Schematic Diagrams

  34. Troubleshooting with Schematic Diagrams

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