Maximum current limitation of a digital pin on UNO - Hardware/Schematic https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/ Hi, Welcome to the eTechnophiles forum. Got a question like, \'What resistor value to choose for your simple LED project\' OR \'Where is the resistor connected to the inbuilt LED in Arduino UNO\'s schematic\' - All will be answered here. Feel free to check out the topics below. en-US Sun, 12 Apr 2026 12:48:06 +0000 wpForo 60 RE: Maximum current limitation of a digital pin on UNO https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-35 Fri, 17 May 2024 05:28:29 +0000 Hardware/Schematic Admin https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-35 RE: Maximum current limitation of a digital pin on UNO https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-34 Wed, 15 May 2024 11:16:43 +0000 Hardware/Schematic Harper https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-34 Answer to: Maximum current limitation of a digital pin on UNO https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-7 Tue, 30 Apr 2024 05:55:07 +0000 Yes, the current limit per pin is 40 mA(sink/source OR IN/OUT). However, this is the maximum absolute rating and you should not draw this much current continuously. The safe value is around 20-30 mA. It's better to use a DC motor driver like L293D or L298N for driving DC motors using Arduino.

I hope this helps.

]]> Hardware/Schematic Admin https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-7 Maximum current limitation of a digital pin on UNO https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-4 Mon, 29 Apr 2024 05:35:12 +0000 Hey folks, I'm new to Arduino and tinkering with digital pins for a project. I'm trying to control a DC motor that I've hooked up to one of the digital pins. I've heard it's important to stay within the current limits of the pins, around 40mA per pin. Can someone confirm this for me? And also, what happens if I exceed this limit while powering the motor? Will it damage my board?

]]> Hardware/Schematic Harper https://forum.etechnophiles.com/hardware-arduino/maximum-current-limitation-of-a-digital-pin-on-uno-2/#post-4