electronic circuits for grade 9 prepared by g. c. accom
TRANSCRIPT
![Page 1: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/1.jpg)
ELECTRONIC CIRCUITS FOR GRADE 9
Prepared by G. C. Accom
![Page 2: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/2.jpg)
SOME OF THE SYMBOLS WE WILL USE
SYMBOL NAME SYMBOL NAME SWITCH LDR
BULB
RESISTOR
TRANSISTOR
CAPACITOR
BUZZER DIODE
CELLS IN PARALLEL
CELLS IN SERIES
![Page 3: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/3.jpg)
How to make a simple cell-holder for batteries
USE A PIECE OF RUBBER
HOSE AND A KNIFE
![Page 4: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/4.jpg)
CUT A SLIT INTO THE HOSE
![Page 5: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/5.jpg)
SLIDE THE NUMBER OF CELLS YOU NEED INTO THE SLIT YOU HAVE CUT
![Page 6: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/6.jpg)
![Page 7: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/7.jpg)
I GRADE 9 YOU WILL BE WORKING WITH THE FOLLOWING POWER SOURCES
EXPLAIN TO LEARNERS
WHY WE SAY THESE CELLS
ARE CONNECTED
IN SERIES
![Page 8: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/8.jpg)
A SIMPLE CIRCUIT WITH CELLS CONNECTED IN SERIES
PUSH SWITCHALWAYS ON
SWITCH MADE WITH PAPER CLIP AND THUMB TACK
TOGGLE SWITCH
PUSH SWITCH ALWAYS OFF
![Page 9: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/9.jpg)
PUSH SWITCH Normally ON in its normal state
![Page 10: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/10.jpg)
It switches OFF when you press it
![Page 11: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/11.jpg)
PUSH SWITCH Normally OFF in its normal state
![Page 12: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/12.jpg)
It switches ON when you press it
![Page 13: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/13.jpg)
![Page 14: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/14.jpg)
CIRCUIT DIAGRAM FOR TWO CELLS CONNECTED IN SERIES
![Page 15: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/15.jpg)
SWITCH OPEN
![Page 16: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/16.jpg)
![Page 17: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/17.jpg)
SWITCH CLOSED
![Page 18: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/18.jpg)
CELLS CONNECTED IN PARALLELSwitch Open
![Page 19: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/19.jpg)
![Page 20: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/20.jpg)
CELLS CONNECTED IN PARALLELSwitch Closed
![Page 21: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/21.jpg)
BULBS CONNECTED IN SERIES
![Page 22: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/22.jpg)
![Page 23: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/23.jpg)
SEE WHAT HAPPENS WHEN ONE BULB IS REMOVED
![Page 24: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/24.jpg)
BULBS CONNECTED IN PARALLEL
![Page 25: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/25.jpg)
![Page 26: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/26.jpg)
SEE WHAT HAPPENS WHEN ONE BULB IS REMOVED
![Page 27: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/27.jpg)
AND SWITCH – Both Open
![Page 28: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/28.jpg)
AND SWITCH – One Closed
![Page 29: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/29.jpg)
AND SWITCH – Both Closed
![Page 30: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/30.jpg)
OR SWITCH – Both Open
![Page 31: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/31.jpg)
OR SWITCH – Bottom switch closed
![Page 32: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/32.jpg)
OR SWITCH – Top switch closed
![Page 33: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/33.jpg)
OR SWITCH – Both switches closed
![Page 34: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/34.jpg)
![Page 35: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/35.jpg)
4,5 v battery, switch, resistor and LED
![Page 36: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/36.jpg)
CIRCUIT DIAGRAM
![Page 37: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/37.jpg)
LDR, buzzer, 3v battery
![Page 38: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/38.jpg)
Buzzer sounds when light of torch is brought close
![Page 39: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/39.jpg)
CIRCUIT DIAGRAM
![Page 40: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/40.jpg)
LDR with LED
![Page 41: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/41.jpg)
LED is ON in absence of LIGHT
![Page 42: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/42.jpg)
LED is OFF in presence of LIGHT
![Page 43: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/43.jpg)
CIRCUIT DIAGRAM
![Page 44: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/44.jpg)
Circuit with switch, resistor, capacitor, diode & LED
NOTE- LED is OFF
![Page 45: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/45.jpg)
NOTE- LED is ON
![Page 46: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/46.jpg)
NOTE POWER SUPPLY IS REMOVED BUT - LED is still ON
![Page 47: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/47.jpg)
CIRCUIT DIAGRAM
![Page 48: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/48.jpg)
TOUCH OR MOIST DETECTORSWITCH OPEN = LED OFF
WATER
![Page 49: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/49.jpg)
SWITCH CLOSED = LED ON
WATER
![Page 50: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/50.jpg)
CIRCUIT DIAGRAM
![Page 51: ELECTRONIC CIRCUITS FOR GRADE 9 Prepared by G. C. Accom](https://reader036.vdocument.in/reader036/viewer/2022081501/56649ccf5503460f9499bd4f/html5/thumbnails/51.jpg)
YOU CAN USE EXACTLY THE SAME CIRCUIT TO ADD A BUZZER
WATER
CONNECT TERMINALS OF BUZZER HERE