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An Arduino-Compatible Relay Controller for RS-485 Networks

An Arduino-Compatible Relay Controller for RS-485 Networks

This project brief describes how to build and use an Arduino-compatible relay interface board that switches a 10 A load over an RS-485 network.

Projects Sep 16, 2026 by Rajkumar Sharma, All About Circuits
Build Raspberry Pi Controllers: LED Flasher

Build Raspberry Pi Controllers: LED Flasher

In this project, you'll learn how to wire an LED and flash it using the Raspberry Pi. Also, to isolate the Raspberry Pi's + 3.3VDC compliant output pins from supply voltages greater than this power source, an opto-isolator will be introduced as well.

Projects Dec 11, 2015 by Don Wilcher