Content for 4N25

4N25

4n25 is a standard single channel 6 pin industry standard phototransistor coupler that contains silicon NPN phototransistor and gallium arsenide infrared LED. It is also known as an optocoupler, photocoupler, or optoisolator.

Arduino Based AC Voltage Control using Zero Voltage Crossing

“Usually, our home appliances run on single-phase AC voltage. And in India usually, a house is supplied with single-phase AC voltage with a voltage range of about 220-240 volts at 50Hz(your supply may be different). AC voltage in its …

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 …

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 …

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 …

DIY SMD Rework Station

“In this Instructable you can learn how to make a hot air gun controller using Arduino and other common components. In this project, PID algorithm is used to calculate the power required and is controlled by a isolated Triac driver …

DIY Arduino Soldering Station

“In this project I will show you how to create an Arduino based soldering station for a standard JBC soldering iron. During the build I will talk about thermocouples, AC power control and zero point detection. Let’s get started …