2 - Control an LED with a limit switch

An example of how to hook up a limit switch, read its value, and use that to turn an LED on and off

[@danterusso6354]

I know that this was some time ago. But, as someone who is older and just finding these Arduino tutorials for the first time, I am incredibly grateful for your efforts and for sharing your skills with the rest of the world! Thank you!!

[@hayleychristianson9324]

Spent literally hours trying to get this switch running, checking other videos and datasheets, and only now am I seeing that the 10k ohm resistor was necessary. Thank you so much for being the god you are!

[@Allahourowner]

I had been searching for this for hours now and i cant thank you enough for this, Great Video and very well explained. Thank you once again.

[@360_tours]

Very well taught. Thank you! I was getting a lot of noise and this video eliminated that. Only one on youtube I could find.

[@Googlename699]

Thank you very much for the circuit and for the code. but one more think i want to ask you . why you did not connect the third pin ?

[@anubhavsingh9049]

Thanks for saving my time

[@brad346326]

1:59 was waiting for you to depress limit switch lol Dead short to ground as the limit switch has zero resistance. Good thing you put that resister in place to act as a load.

[@xtineeva6558]

hi sir how are you?. we saw and tried your tutorial and we put some buzzer on it and it works. i just wanted to ask if you have a circuit diagram for it? we just wanted to use it as a reference for our project. it will be a big help. thanks and more power.

[@peteranesu8870]

Thank you very much

[@spiksplinter]

Thanks!

[@huntingvega3876]

Arduinos have internal pull ups, why would you do it externally?

[@markfrancistrono9041]

hi, is it possible to directly connect the limit switch without using any led?

[@moussa6694]

THANK YOU

[@OscarSanchez-568]

when I do this my arduino turns off is it suppose to do that? I

[@muhamadgofur6289]

thanks u bro

[@guadalupecruz2783]

Do you have the scheme circuit?

[@davidgreen3473]

I am having a problem. I copied as you have illustrated but the pin value always stays a "1" even when switch is pressed. What could be wrong?

[@sb-rj6yb]

There are 3 PINS C, NO, NC. can you tell me why c is not connected to GND instead you connected it to 5v right..? please mention how to connect you havent tell pin names like C, NC, NO

[@Kevin-tb8jr]

I also want to know. but no one answer , how sad

[@philipmcgregor8740]

C is common, NO is Normally Open, and NC is Normally Closed. So you can run the active/positive connection through C, it will switch between NC and NO when the button is pressed and depressed. NO will have no current when the button is not pressed, but when pressed it will have current. NC is the opposite, it will have current when the button is not pressed, and no current when the button is pressed closed.

[@maisamnaqvi6192]

what if we want to keep the LED on after pressing the switch?

[@llllllllllllllllllllllllIIIIl1]

Make it if the limit switch is clicked, click = 1; Theb if (click =1) { //code } Or something like that

[@discolapy]

Thanks for the video! It was useful for me in order to construct my "Bimbo V.1" device: kzbin.info/www/bejne/rJjJdIypnr90oac By the way, what do you think it is actually good for?