Hi,

I would like to purchase and/or build an optocoupler for general low power applications. I have played with the 4n26 and is a poor choice. The primary use would be decoupling a Raspberry Pi from whatever I'm working with such as an Arduino with a number of sensors. I generally tinker with 3.3/5V and switch less than 1A and intend to learn more about coupling and how to modulate and demodulate data between devices via optics. I am looking for two types of IC, digital and linear. I have a few infrared emitters and photodiodes and am interested in building some circuits in an enclosed black box for fun as well.

Regards,
Mark

 

4N26 is quite slow but OK for GPIO.
No good for high-speed serial data.
What is the function?

 

Hi,

I would like to purchase and/or build an optocoupler for general low power applications. I have played with the 4n26 and is a poor choice. The primary use would be decoupling a Raspberry Pi from whatever I'm working with such as an Arduino with a number of sensors. I generally tinker with 3.3/5V and switch less than 1A and intend to learn more about coupling and how to modulate and demodulate data between devices via optics. I am looking for two types of IC, digital and linear. I have a few infrared emitters and photodiodes and am interested in building some circuits in an enclosed black box for fun as well.

Regards,
Mark

Can I point you at the ADI web site of isolator devices for various protocoles
https://www.analog.com/en/products/interface-isolation/isolation.html

 

I have played with the 4n26 and is a poor choice.

Why?
Is it too slow?
There are a number of digital optocouplers with much higher speed such as this.