Arduino UNO R4 Lesson 04. Variables, Data Types, and Constants | Arduino Ultimate Training Course

[@mikehuang8035]

Your course is fantastic. Please keep up the good work. More and more students will surely enjoy your courses.

[@joedgoh]

Thank you Mike! 🙂

[@mixme8655]

Thank you now watching and learning 😊❤❤❤

[@joedgoh]

Thanks!

[@mixme8655]

@@joedgoh sir I finished it thank you it took me too long because I am a beginner

[@michelealbanese4438]

Complimenti ❤

[@davidcho3884]

i am doing this for my arduno science project. thank you!

[@joedgoh]

You are welcome! 😁

[@mixme8655]

Good evening sir I am ready for lesson 5 😊😊😊

[@joedgoh]

Thanks... Lesson 05 is up!

[@mixme8655]

@@joedgoh thank you sir lesson 5 is my next target asap

[@310765]

But will the traffic light unit draw to much current from the Arduino R4?

[@joedgoh]

In lesson 03 I discussed how to compute for the current-limiting resistors to be used. R4 has a max current of 8mA per pin. I used 1k ohm resistor per LED. You can even use a bigger value resistor but the LED will be a bit dimmer.

[@310765]

⁠@@joedgohHi joedgoh, the pre assembled traffic light unit (the one with the larger LEDS) looks like it has 330ohm smd resistors built in to the unit, by my calculations (5v - 2v / 330) the current flow would be around 9-10ma which is greater than what the Arduino R4 pins can handle, would you suggest using another 330ohm resistor wired in series for each LED? Thanks 🤩 ❤

[@joedgoh]

Yes, that is good! 🙂 thanks