IoT & Hardware
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You're reading from  Arduino Development Cookbook

Product typeBook
Published inApr 2015
Publisher
ISBN-139781783982943
Edition1st Edition
Tools
Arduino
Concepts
Robotics
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Author (1)
Cornel M Amariei
Cornel M Amariei
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Cornel M Amariei

Cornel Amariei is a Romanian inventor and entrepreneur in the fields of Robotics and 3D printing. He has been working with the Arduino platform since its early days in 2007. His past experience involves large cargo gamma ray scanning robotics, ATM security systems, and blind assisting devices. In his spare time, he is a performing musician playing multiple instruments—predominately the guitar. He is also a swimmer, water polo player, and photographer. Over the years, he has built hundreds of Arduino projects, ranging from flying Quadcopters to levitating magnets and underwater robots. Currently, he splits his time between doing his undergraduate studies in electric engineering and computer science at Jacobs University in Bremen, Germany, and his start-ups and research and development job.
Read more about Cornel M Amariei

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Optocouplers/Optoisolators

There are times when we want to completely insulate two circuits, but still pass signals between them. We can do that with a relay. However, a relay is very slow. It takes around 10–30 milliseconds to switch on or off. We can't do PWM or communications at this pace. However, there is a clever Integrated Circuit (IC), called either the optocoupler or the optoisolator, which does exactly that.

In this recipe, we will use an optocoupler to switch on an LED with a completely different circuit that has its own independent power supply.

Getting ready

Following are the ingredients needed for this recipe:

  • An Arduino board connected to a computer via USB

  • Two general 220-ohm to 1,000-ohm resistors

  • A breadboard

  • A 1.5–3.0 V battery, preferably with wire terminals

  • A general LED

  • A general optocoupler/optoisolator such as the TLP621, 4N35, or LTV-816

How to do it…

Following are the general steps to connect an optocoupler to the Arduino and then to connect another circuit containing an LED...

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Arduino Development Cookbook
Published in: Apr 2015Publisher: ISBN-13: 9781783982943
© 2015 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Cornel M Amariei

Cornel Amariei is a Romanian inventor and entrepreneur in the fields of Robotics and 3D printing. He has been working with the Arduino platform since its early days in 2007. His past experience involves large cargo gamma ray scanning robotics, ATM security systems, and blind assisting devices. In his spare time, he is a performing musician playing multiple instruments—predominately the guitar. He is also a swimmer, water polo player, and photographer. Over the years, he has built hundreds of Arduino projects, ranging from flying Quadcopters to levitating magnets and underwater robots. Currently, he splits his time between doing his undergraduate studies in electric engineering and computer science at Jacobs University in Bremen, Germany, and his start-ups and research and development job.
Read more about Cornel M Amariei

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