Optocouplers frequently fail without a sound in labs or during repairs. The package appears to be undamaged, but there may be no output from the LED source or the photosensitive output stage. Testing ...

Discover how to create a simple solar energy harvester at home using basic household items and electronic components. This step-by-step tutorial guides you through building a DIY solar power device ...

As a $35 pc with very low power requirements, the Raspberry Pi is uniquely suited to serve many different purposes especially as an always-on low power server. When I first heard of the Pi, I was ...

OBD stands for On-Board Diagnostics, and this standard connector has been mandated in the US since 1996. Now you can think of OBD-II as an on-board computer system that is responsible for monitoring ...

Of course, many different types of distance measuring sensors exist but not all sensors are the same. Each sensor has its own advantages and disadvantages. At its most basic level, a distance ...

Different fans have different methods of keeping a scorecard, and many use their own notations. But here's a simple method: If the hitter grounds out to shortstop, for example, write in "6-3," which ...

You’ve settled into your favorite couch corner with a bowl of popcorn, ready to binge-watch your new obsession. But then you notice your Google TV remote not working! This annoying problem has many ...

A precision voltage reference is useful in the lab for checking your multimeters. This post describes the construction of a poor man’s precision voltage reference. It is great for checking any ...

Discover how you can build a professional digital multimeter using Arduino that measures up to 24V DC voltage, checks resistance, conducts diode testing, and performs continuity tests. This ...