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ELECTRONIC CIRCUITS FOR GRADE 9

ELECTRONIC CIRCUITS FOR GRADE 9. Prepared by G. C. Accom. SOME OF THE SYMBOLS WE WILL USE. How to make a simple cell-holder for batteries. USE A PIECE OF RUBBER HOSE AND A KNIFE. CUT A SLIT INTO THE HOSE. SLIDE THE NUMBER OF CELLS YOU NEED INTO THE SLIT YOU HAVE CUT.

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ELECTRONIC CIRCUITS FOR GRADE 9

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  1. ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom

  2. SOME OF THE SYMBOLS WE WILL USE

  3. How to make a simple cell-holder for batteries USE A PIECE OF RUBBER HOSE AND A KNIFE

  4. CUT A SLIT INTO THE HOSE

  5. SLIDE THE NUMBER OF CELLS YOU NEED INTO THE SLIT YOU HAVE CUT

  6. I GRADE 9 YOU WILL BE WORKING WITH THE FOLLOWING POWER SOURCES EXPLAIN TO LEARNERS WHY WE SAY THESE CELLS ARE CONNECTED IN SERIES

  7. A SIMPLE CIRCUIT WITH CELLS CONNECTED IN SERIES SWITCH MADE WITH PAPER CLIP AND THUMB TACK TOGGLE SWITCH PUSH SWITCH ALWAYS OFF PUSH SWITCH ALWAYS ON

  8. PUSH SWITCH Normally ONin its normal state

  9. It switches OFF when you press it

  10. PUSH SWITCH Normally OFF in its normal state

  11. It switches ONwhen you press it

  12. CIRCUIT DIAGRAM FOR TWO CELLS CONNECTED IN SERIES

  13. SWITCH OPEN

  14. SWITCH CLOSED

  15. CELLS CONNECTED IN PARALLELSwitch Open

  16. CELLS CONNECTED IN PARALLELSwitch Closed

  17. BULBS CONNECTED IN SERIES

  18. SEE WHAT HAPPENS WHEN ONE BULB IS REMOVED

  19. BULBS CONNECTED IN PARALLEL

  20. SEE WHAT HAPPENS WHEN ONE BULB IS REMOVED

  21. AND SWITCH – Both Open

  22. AND SWITCH – One Closed

  23. AND SWITCH – Both Closed

  24. OR SWITCH – Both Open

  25. OR SWITCH – Bottom switch closed

  26. OR SWITCH – Top switch closed

  27. OR SWITCH – Both switches closed

  28. 4,5 v battery, switch, resistor and LED

  29. CIRCUIT DIAGRAM

  30. LDR, buzzer, 3v battery

  31. Buzzer sounds when light of torch is brought close

  32. CIRCUIT DIAGRAM

  33. LDR with LED

  34. LED is ON in absence of LIGHT

  35. LED is OFF in presence of LIGHT

  36. CIRCUIT DIAGRAM

  37. Circuit with switch, resistor, capacitor, diode & LEDNOTE- LED is OFF

  38. NOTE- LED is ON

  39. NOTE POWER SUPPLY IS REMOVED BUT - LED is still ON

  40. CIRCUIT DIAGRAM

  41. TOUCH OR MOIST DETECTORSWITCH OPEN = LED OFF WATER

  42. SWITCH CLOSED = LED ON WATER

  43. CIRCUIT DIAGRAM

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