Easy Arduino Tachometer with Photointerrupter

[@VasilisKarastergios]

Looking forward for the PID tutorial, thanks for sharing!

[@michaeljoshuamanallo1742]

awesome bro but can I use a proximity sensor instead of that sensor

[@georgejbaker]

Hey, this is fantastic! I was only looking at using one of these encoder wheels last week. Great job!

[@zenzen9131]

Great video and thanks for sharing it with us. Oh btw, with regard to your calculations, RPM is just RPS * 60 :)

[@georgechambers3197]

I tried to use one of these on a CNC mill but the lighting just didn't work with it very well. But a hall effect solved the problem and noe I use them on all my lathes and mills for tachometers. I'm even thinking of using one on my diesel truck. Good video, I'm looking forward to more!

[@learnelectronics]

+George Chambers Thanks my friend

[@gartmorn]

Good wee circuit. Will be more practical once pwm and duty cycle are adjusted to give the motor drive more real world uses!

[@learnelectronics]

+gartmorn well that would be in today's video

[@gartmorn]

Davy Roscoe your psychic sidekick, or something!

[@jamest.5001]

great .video. I really want to start learning arduino. and other micro controllers. I want to do so much!

[@learnelectronics]

+James stranger Cool

[@joshuajimenez5862]

Great video, helped me a lot.. I'd like to know the specifications of your sensor? thanks!

[@michaelpadovani9566]

Nice, do u think a photo sensor or hall effect sensor is better at detecting RPMs?

[@learnelectronics]

+Michael Padovani Totally depends on the use. In a small enclosed system like an Arduino robot or the like, a photo sensor is cheap, lightweight and easy to implement. On the other hand, all of large scale gas-powered RC planes with 50 & 100cc engines use a hall sensor on the prop shaft for the ignition timing. The hall sensor is not effected by changing light conditions, oil or dirt. So I guess what I'm trying to say is that each have their place.

[@michaelpadovani9566]

learnelectronics like many things do in this world! Thx for the reply.

[@cbm80amiga]

Hall sensor is faster, doesn't need ADC and requires less energy. But sometimes it is not very convenient to mount strong magnet and in case of photo transistor black/white pen or paint is easier to apply.

[@abensu24]

Nice job!!!

[@ufohunter3688]

How do you like your scope. I am thinking of getting one of them. Any issues? Would you buy it again knowing what you know now? thx

[@learnelectronics]

+UFOhunter I have no issues at all, and I recommend it to everyone who asks. A 200MHz 1Gs/s scope for under $250 is unbeatable.

[@learnelectronics]

+UFOhunter if you have any questions, you know where to find me.

[@ufohunter3688]

Did you have any problems hacking it to 200MHz?

[@zakriaalghalban8633]

How to use mosfet and arduino to controlling speed and direction for dc motor

[@lastchance045]

interesting subject but a schematic would be an improvement insted of a grainy and poorly shown set-up. Another improvement would be to list which oled you used as well as listing the specific photointerrupter used

[@hoppynaki]

My one is way to sensitive when I'm trying to control a fan. It doesn't come on to about 230 and there is not much between slow and full on.

[@MoDiver8]

I know this is a fairly old post, but just came across it. You're using your threshold value "milisecs" in your RPM calculation instead of the actual value. Yes they are virtually the same given the Arduino clock speed, but I would have used the actual value. I'm not sure I agree with the math, I would need to play with it. But good job nevertheless.

[@maxpolaris99]

Who cares about revs/sec? Well its sometimes much more practical than revs/min when you're gauging /estimating how fast something moves. ie 3 inches/sec or 180 inches per min, 1 inch/sec or 60 inch/minute

[@kevinford9205]

Do you have an email address I’ve got a code I would love your help with

[@learnelectronics]

+Kevin Ford Project help, troubleshooting, diagnostics is a service I offer my patrons. www.patreon.com/c/learnelectronics

[@MrKontrolFreek]

Um did you just fucking say that 10Hz is about the limit of the human eye?