Content for Optocoupler

Optocoupler

An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 25 kV/μs. A common type of opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.

Silent Running With This Dual Fan Controller

“Add a quiet fan cooling system to existing equipment with this configurable controller. I prefer a quiet and calm environment. It’s why I prefer listening to the more mellow broadcasts from BBC Radio 4 or Classic FM. It’s …

ESP01 Project Using Blynk IFTTT & Google Assistant

“Make an ESP01 Project using Blynk IFTTT to control a 2-channel relay module with the Google Assistant. (Circuit + Source Code) In this IoT project, I have shown how to make an ESP01 Project using Blynk IFTTT to control a 2-channel …

IR remote control Arduino based electric board

“Arduino based electric board controlling system, Can be controlled using any universal IR remote. good IR receiving range and support 12 CH. Hello guys, today we are going to make a remote-control universal switch on/off 3 channel circuit. Though …

MQTT ESP8266 Home Automation Project 2021

“How to make MQTT ESP8266 NodeMCU Home Automation project to control relays from the switch and smartphone (Circuit + Code) through internet. In this IoT project, I have shown how to make an MQTT ESP8266 Home Automation project to control a …

Resettable E-Fuse

“A simple, cheap short circuit protector, controllable either manually or using a microcontroller. There are many E-fuses available both precises ones, used in industrial or critical situations, and [cheap] maker-friendly ones which despite doing their job, but are not suitable …

Bridging the gap between old and new, garage door gets a Wi-Fi controller

“This project started a long time ago, the idea is to be able to control the two garage doors remotly. Before anything else, you have to understand how the door is working, each door has one button, press it, it …

How to Make an AC Softstarter

“In this project I will show you why my new autotransformer keeps tripping my circuit breaker and how I built an AC softstarter in order to “softly” start the transformer so that it does not trip my circuit breaker. Along …

USB MIDI Adapter

“Simple USB to MIDI adapter based on an Arduino Micro or Leonardo, optionally with the ability to filter the MIDI data. I searched the net how to build a USB to MIDI adapter using an Arduino, but unfortunately I only …

Creating a MIDI Pass-Through Recorder

“Create an inline MIDI recording with an Arduino, an SD card module, and never lose your musical noodling ever again! Creating a MIDI pass-through recorder If you’ve ever used audio software on the computer, you probably know that MIDI …

Make your UPS smarter with ESP8266 and PCF8591

“The UPS did not shut down the computer in the event of a power outage. This hack makes the UPS smarter, I made this circuit with ESP8266 I have a well-functioning UPS with a faulty network interface, I use it …