Lesson 10/1759%
MODULE 10

Optocoupler Design Examples

Complete, values-included reference designs: MCU input/output isolation, a 24 V PLC input channel with surge protection, TL431 + PC817 SMPS feedback with loop compensation, an IGBT gate-drive stage, mains zero-cross detection, and isolated UART/RS-485 links.

⏳ Coming Soon — content in development

Learning Objectives

After completing this module, you will be able to:

Design isolated MCU interfaces with full component values
Build robust 24 V PLC input channels
Implement and compensate SMPS optocoupler feedback
Design gate-driver stages with proper bypassing and CMTI margin
Implement zero-cross detection and isolated communication links

Planned Topics

MCU interfaces
PLC inputs
SMPS feedback
Gate drivers
Zero-cross detection
Communication interfaces

Reserved Sections

This module will follow the same interactive format as Module 1:

Interactive animations

Animated diagrams and simulations for this module are in development.

Engineering calculators

Module-specific design calculators will appear here.

Design examples

Worked examples with full component values are planned for this section.

Knowledge check

Multiple-choice, true/false, and scenario exercises will be added.

Downloadable resources

PDF notes, reference tables, and checklists will be provided.

While you wait: Module 1 — Introduction to Optocouplers — is fully available, including animations, the CTR and isolation calculators, and a complete knowledge check. Start there →