basic electronics2
DESCRIPTION
Basic ElectronicsTRANSCRIPT
![Page 1: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/1.jpg)
ELECTRONICSELECTRONICS
Frost AlarmFrost Alarm
![Page 2: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/2.jpg)
ELECTRONICSELECTRONICS
When the thermistor When the thermistor temp is high the temp is high the resistance is low resistance is low
and the transistor is and the transistor is off.off.
![Page 3: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/3.jpg)
ELECTRONICSELECTRONICS
Frost AlarmFrost Alarm
![Page 4: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/4.jpg)
ELECTRONICSELECTRONICS
When the thermistor When the thermistor temp is low , the temp is low , the resistance is high resistance is high and the transistor and the transistor switches on.switches on.
![Page 5: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/5.jpg)
ELECTRONICSELECTRONICS
Fire AlarmFire Alarm
![Page 6: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/6.jpg)
ELECTRONICSELECTRONICS
When the temp is hot the When the temp is hot the thermistor resistance is thermistor resistance is
low so it takes little low so it takes little voltage and so the resistor voltage and so the resistor takes most of the voltage takes most of the voltage
and so the transistor and so the transistor switches on. switches on.
![Page 7: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/7.jpg)
ELECTRONICSELECTRONICS
Fire AlarmFire Alarm
![Page 8: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/8.jpg)
ELECTRONICSELECTRONICS
When the temp is cold When the temp is cold the thermistor takes the thermistor takes
most voltage and so the most voltage and so the resistor takes little and resistor takes little and
the transistor is off.the transistor is off.
![Page 9: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/9.jpg)
ELECTRONICSELECTRONICS
Burglar AlarmBurglar Alarm
![Page 10: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/10.jpg)
ELECTRONICSELECTRONICS
When the L.D.R. is in the When the L.D.R. is in the light ,the resistance is light ,the resistance is
low so the voltage is low low so the voltage is low and the transistor is offand the transistor is off
![Page 11: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/11.jpg)
ELECTRONICSELECTRONICS
Burglar AlarmBurglar Alarm
![Page 12: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/12.jpg)
ELECTRONICSELECTRONICS
When the L.D.R. is in the When the L.D.R. is in the dark its resistance is high dark its resistance is high
and the transistor switches and the transistor switches on.on.
![Page 13: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/13.jpg)
ELECTRONICSELECTRONICS
Time Delay CircuitTime Delay Circuit
![Page 14: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/14.jpg)
ELECTRONICSELECTRONICS
When the capacitor When the capacitor charges up to a certain charges up to a certain voltage after a certain voltage after a certain time , the transistor time , the transistor
switches on.switches on.
![Page 15: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/15.jpg)
ELECTRONICSELECTRONICS
![Page 16: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/16.jpg)
ELECTRONICSELECTRONICS
There are 3 process There are 3 process devices,devices,
The NOT gateThe NOT gate
The AND gateThe AND gate
The OR gateThe OR gate
![Page 17: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/17.jpg)
![Page 18: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/18.jpg)
![Page 19: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/19.jpg)
![Page 20: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/20.jpg)
![Page 21: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/21.jpg)
![Page 22: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/22.jpg)
![Page 23: Basic Electronics2](https://reader030.vdocuments.us/reader030/viewer/2022032522/55cf9021550346703ba327c5/html5/thumbnails/23.jpg)