Transistor as an Automatic Switch / Light-Controlled Switch / Heat-Controlled Switch

A transistor can function as an automatic switch. It can work as both an automatic light switch and an automatic heat switch. The special electronic components involved here are the thermistor and the light-dependent resistor (LDR).
ALSO WATCH:
Potential Divider - • Potential Divider Circ...
Semiconductor Diode - • Semiconductor Diode - ...
00:00 - Transistor circuit and potential divider
02:36 - Thermistor in heat-controlled switch
07:06 - Light-dependent resistor in light-controlled switch
Catering for KSSM SPM students.
This topic can be found in KSSM Physics Form 5 Chapter 5 : Electronics
Don't forget to like the video and subscribe for more free tuition! Enable notifications so you don't miss out on anything.
Notes, practice questions and more: mrrueltuition.com
Follow me on instagram: @mrrueltuition
TikTok short lessons: @mrrueltuition
Join my Facebook page: mrrueltuition
#mrrueltuition #mrruelhometutor #freetuition #freeclasses #freelessons #spm #igcse #onlineclass #quarantine #mcolearning #quarantinelearning

[@i.s.a.8004]

Thank you so much.This was the only video i could understand relevant to this topic.💐

[@MrRuelTuition]

I'm so glad it helped! Always a joy to get these 😊

[@auditor9927]

How this logic works for pgoto resistor

[@5irozaimi439]

sir electronic is my weakness but you such a lifesaverrr ! tqvm hope to see another vid abt this topics soon

[@MrRuelTuition]

You're most welcome. I've also done semiconductor diode (th-cam.com/video/i0U2o-d9kQk/w-d-xo.html) and potential divider (th-cam.com/video/8KzWHLJJHiw/w-d-xo.html) already. I'm going to do Quantum Physics next.

[@terrymosley3835]

Hi Great video I am not very good at this but this appears to be what I want
Problem is I have no idea on electronics but I can build them
I need to have a circuit that monitors the Cylinder head Temperature on my scooter so the engine does not overheat and seize
The temperature I need is approx 100 degrees I want to turn on a Red LED light at this temperature on rising temperature can you help me with the Type, value and numbers of the components for this task
The Thermistor will be attached to the Cylinder Head and the rest will be in the head set of the scooter
Terry mosley

[@user-it7nj3oz1p]

If the light bulb is outside on the line of the positive which path do you take

[@mohfa1806]

But the two resistors are not in series , why you assume so ?...thx

[@shavinamohan9714]

hi sir thank you so much for this precious video. means alot
but I'm quite confused about how you determined the forward biased and reverse biased in the circuit
it'll be great if you could explain that..bcs i get everything you said in this video except for this one
thank you

[@MrRuelTuition]

Hi, you're most welcome 😊. For forward and reverse bias, you need to watch this one: th-cam.com/video/i0U2o-d9kQk/w-d-xo.html

[@Sikeu56g]

Thank youu ! This video is very informative and helpful. I would appreciate if sir can explain about transistor circuits which I am very weak at..

[@MrRuelTuition]

Hi, thank you for the kind comments! What other kind of transistor circuits would you like to learn about? I'll be happy to cover it if it's relevant to my syllabus.

[@ainsyahadah8592]

hi sir ... can you teach me how to make a heat switch on pcb board i add a buzzer ... i have tried many times but unsuccessful..

[@MrRuelTuition]

Hi, I'm afraid it's been too long since I touched a PCB board. But theoretically, make sure your buzzer is in your collector circuit (it should be connected to the collector-emitter path), your thermistor is connected to the collector-base path (to the current-controlling resistor) and the resistor that forms your potential divider is connected to the base-emitter path. Make sure the resistor that forms your potential divider is in series with the thermistor.