Single transistor DC motor speed controller!
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- Опубликовано: 19 июн 2024
- In this video, we will learn about Transistors, Potentiometers, and basic concept behind analog current buffer or Simple DC motor Speed Controllers.
there is a secret about BJT transistors which makes us able to design a very simple analog current amplifier. in this video i am going to reveal this secret!
You are a good teacher! Keep it up! I am a retired electronics teacher.
Wow, thanks!
So nice of you ❤️
studied all this 35 years ago, then got a job as a programmer, and forgot most of it. now i have arduino and raspberry and other things to work with, and i need to join these skills together - thank you very much for reminding me. you are an excellent teacher, you seem to understand completely how it all works, and you explain everything very well. very much appreciated.
That's awesome! I am so glad to hear that
That's a very different perspective you gave me about base emitter voltage feature 😮thank you
My pleasure ❤️
Thank you for making great videos! 👍🏻
My pleasure!
You have a useful message and reminder - while PWM is glitzy and cool way to reduce board sizes, the power / simplicity of Bipolar Junction Transistors can be neglected. Good simple explanation how the need to persist the 0.7 base-emitter drop results in movements on the base to be mirrored in movements at the emitter terminal having a different (often larger/amplified) range of motion.
Thank you for your comment.
Thanks for this, I've learnt something new today.
Glad to hear that ❤️
Thank you for the videos, very informative. Please can you specify the components and the values you used in your test circuit. For example wht BJT transistor. Thanks
definitely learned something new 👍👍
Awesome!
to think that a switched mode power supply is HELL for anything related to Radio
Healthy and Friendly Greetings from the Netherlands!
Rob
Thank you Rob, yes that is true, switched mode power supplies are noisy but they are good enough for testing and some particular applications.
absolutely 1000% true!
Excellent vdos, love your drawings on paper
Thank you so much 😀
Your videos are very good and remind us of all the essential functions and the importance of keeping our designs simple as one of the basic concepts of engineering. Can i use 2 or 3 transistors in parallel to use with a bigger motor or what should i do to manage higher current? Thank you!
Glad to hear that, yes you can use parallel transistors but I don't recommend. It is better to use a single high power transistor.
Addition of a diode at motor side will protect the transistor from sudden change in voltage.
I think you mean protecting against back emf which is coil magnetic field collapse. That is only an issue when using PWM.
There is no sudden voltage change here. The voltage on output is soft and nicely smooth.
@@elewizard Exactly. see my reply.
@@robguyatt9602 thank you for your comment. You are right 👍
@@elewizard Well there's a first time for everything aint there. LOL. My thing is RC servo motor design and manufacture. Mostly self taught via books and youtube. I did some trade level electronics courses too. All enough to turn a hobby into my living.
Pretty cool.
Thank you!
very well explained
Glad you think so!
хорошо объяснил, спасибо
Thank you dude!
how does this compare to pwm in terms of efficiency?
🤩🥰
❤️❤️❤️❤️
🙏
🙏
a few more parts and you got an audio amp, make sure your transistor can handle the max current through the motor or you wont have a good time
Exactly 😉
can i use bc547 with this project?
It depends on the output power you need 👍