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You are here: Home » How to Connect Multiple LEDs With One Arduino Pin (Series Connection)

By Abhishek Ghosh August 25, 2018 3:08 pm Updated on August 25, 2018

How to Connect Multiple LEDs With One Arduino Pin (Series Connection)

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Connecting Multiple LEDs in Series Can Create Nice Lighting Effects. Most of the consumer grade Christmas light, Diwali light etc uses just some common IC and transistors. Here is How to Connect Multiple LEDs With One Arduino Pin. In respect to one Pin, result is like as if of Series Connection in ordinary electrical circuits.

Current in Arduino UNO single digital pin will provide 40mA and can power two LEDs. UNO’s VCC pin outputs 200mA and could can power ten LEDs. All we need to do is power our LEDs from the VCC and use the Arduino digital pin as a switch. There are several ways to achieve this.

First way is using transistor, which is easy and cheap but limited to number of LEDs. Second way is using shift register, which is slightly difficult and slightly more costly but it can drive more number of LEDs. The second way officially supported and documented by Arduino.

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In this website, we are not using transistor for this type of purpose to increase the “gain” for the first time. Those who are our new readers, for them – your code will remain same but you need to use higher value of resistors. Consider to use atleast a basic multimeter to measure the voltage to get real idea. Anyway, this is such a circuit :

How to Connect Multiple LEDs With One Arduino Pin Series Connection

 

How to Connect Multiple LEDs With One Arduino Pin With Transistor

 

Luckily, using magical transistor to turn on a higher current is not difficult from the point of wiring. Transistor can switch the VCC connection to the LED array when the digital pin is high.

 

How to Connect Multiple LEDs With One Arduino Pin With Shift Register

 

Detailed article cum guide written on Arduino’s official site – Serial to Parallel Shifting-Out with a 74HC595. We have nothing new to add more than it.

This ends this short guide. We hope that the readers will found both ways useful for various innovative projects.

Tagged With multiple led arduino , arduino multiple leds on one pin , https://thecustomizewindows com/2018/08/how-to-connect-multiple-leds-with-one-arduino-pin-series-connection/ , arduino multiple leds , multiple leds arduino , how to connect arduino driver to leds in line , two leds common pin arduino uno , arduino powering multiple leds , transistor avec led arduino , series connection of led with arduino uno

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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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About This Article

Cite this article as: Abhishek Ghosh, "How to Connect Multiple LEDs With One Arduino Pin (Series Connection)," in The Customize Windows, August 25, 2018, February 6, 2023, https://thecustomizewindows.com/2018/08/how-to-connect-multiple-leds-with-one-arduino-pin-series-connection/.

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