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

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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).
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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
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Опубликовано:

27 июл 2024

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Комментарии : 15

@i.s.a.8004 2 года назад

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

@MrRuelTuition 2 года назад

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

@user-qr5yd3lv8l Месяц назад

Well explained thanks 👍

@5irozaimi439 2 года назад

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

@MrRuelTuition 2 года назад

You're most welcome. I've also done semiconductor diode (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-i0U2o-d9kQk.html) and potential divider (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8KzWHLJJHiw.html) already. I'm going to do Quantum Physics next.

@user-it7nj3oz1p 8 месяцев назад

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

@auditor9927 4 месяца назад

How this logic works for pgoto resistor

@shavinamohan9714 5 месяцев назад

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 5 месяцев назад

Hi, you're most welcome 😊. For forward and reverse bias, you need to watch this one: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-i0U2o-d9kQk.html

@mohfa1806 5 месяцев назад

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

@terrymosley3835 2 года назад

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

@Sikeu56g 2 года назад

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 2 года назад

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 2 года назад

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 2 года назад

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.