Content for Optocoupler

$20 Synth Project

“This guide is for complete beginners in electronics & synth making. We’ll be building the ‘Helios One’, a total bastard of a synth a MIDI controlled synth made from a low cost Arduino micro-controller and the Mozzi audio library. Even …

Arduino MIDI Poly Synth - MiniSy (Musical Instrument)

“3 Oscillators Polyphonic Synth with MIDI using the Arduino Nano. My simple project of a Polyphonic Synthetizer using the Arduino Nano. It is simple but it is possible to play music with it. Up to 3 musical notes can be …

Raspberry Pi Shutdown Indicator

“It’s very simple circuit for showing operational status of raspberry pi (Hereinafter as RPI). Maybe it’s useful when you running RPI as headless (without monitor). Sometimes I’m concerned when is right time for completely power-off after shutdown …

Home Automation Using Arduino and WiFi Module ESP01 | Arduino ESP8266 Control Relay

“In this IoT project, I have shown how to make IoT based Home Automation using Arduino and WiFi module ESP01 to control relays from the manual switch, smartphone, IR remote. This smart relay also can sense the room temperature and …

TEDuino: A Modern TED (264) Series Commodore Datasette

“As part of my Commodore Plus/4 series, chapter three of the user’s manual includes a section on using a Commodore Datasette. In a previous post, I assembled the modern replacement for the Datasette, the Tapuino. “What’s a …

Optocoupler System

“This article explains to connect an Optocoupler System. This system is used to isolate the two power sources. Typical applications include medical where the patient needs to be isolated from possible power supply faults and surges to avoid electric shocks …

Thunderstorm Lightning Detector and Camera Trigger (or Droplet Detector)

“Ever wanted to capture lightning on photo? Maybe this camera trigger will help you make incredible images. Sorry, it will not help you with the composition of your photo, the sensor sensitivity, shutter speed, aperture or whitebalance settings of your …

WI-Fi Controlled 4CH Relay Module for Home Automation

“I have been using a many WI-FI Based on off Switches Previously. But those are not suit with my Requirement. Thats why I wanted to build my own, which can replace normal Wall Switch sockets without any Modifications. The …

Arduino MIDI Rhythm Section Sequencer

“Having a good software drum machine is easy and cheap today but using a mouse kills the fun for me. This is why I realized what initially was intended as a pure 64 steps hardware MIDI drum sequencer capable of …

Doorbell Notifier

“Convert your existing wired doorbell into a smart doorbell, allowing for notifications, integrations, etc. One of the first projects I tackled after getting back into microcontrollers was converting my wired doorbell into a smart doorbell. I wanted to simultaneously trigger …