Microchip Technology application note USB Human Interface Device Class on an Embedded Host.

This application note provides an overview of the I2C bus (focusing on its physical layer), discusses the challenges in isolating I2C interfaces, and describes iCoupler solutions for isolating I2C interfaces.

Do not be tricked by the headline, this is not otherworldly. But let's start with order: what problem do we want to solve?

Fairchild Semiconductor Product Catalog: Analog & Mixed Signal, Discrete Power, Interface & Logic, Microcontrollers, Optoelectronics, RF Power

How to use AC loads through optocouplers from microcontrollers. The article gives an idea of using zero cross type led triac combination optocoupler MOC 3041,43,61,63 series.