The Effects of Directly Connecting an LED to an Arduino

What happens when you put an LED directly into a digital output of an Arduino and turn it on?

So all of the direct solutions drive too much current through the LED. Although the blue and violet LEDs don’t quite exceed the output pin limit, the others certainly do. Those old standby red & amber LEDs would have absurdly high intercepts, well beyond the limit of sanity, in the region where the data you see here breaks down, where the pin driver gives up and goes poof, not that that ever stopped anybody from trying.

Join 4,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Learn “How Computers Work” with Bill Gates, Ladyada and more – From Code.org !

CircuitPython in 2018 – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

Maker Business — Prototyping PCBs with Particle, a guide from a pro in the field #makerbusiness

Wearables — Learn about stretch

Electronics — Test for interference on the cheap!

Biohacking — Visualizing FLU Data with Wearables

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !

1 Comment

  1. And that is why it’s the first thing Massimo shows you to do with your new Arduino in _Getting_Started_with_Arduino_.

Sorry, the comment form is closed at this time.