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.

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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 …