Month: October 2015

Building an MP3 player with Arduino is extremely easy. We use the DFPlayer mini in order to build a simple MP3 player. The MP3 player has 3 buttons, in order to Play/Pause, to load the next song and one in order to load the previous song. In this video we are using an Arduino Uno, but...

Ken Shirriff's blog looks inside the famous 741 OPMAP and discuss how it's made and how it's working: The 741 op amp is one of the most famous and popular ICs[1] with hundreds of millions sold since its invention in 1968 by famous IC designer Dave Fullagar. In this article, I look at...

this is a DDS Funtion Generator by Theodorou Gerasimos: DDS chips are readily available, greatly simplifying the design of the analog part of a wide-range function- or signal generator. All you need to do (they say!) is choose one, add some suitable output circuitry, pick a...

With plug-in enclosures from Fischer Elektronik, it´s easy to solve placing your device into a 19“ „rack“. What enclosure to use for your electronic device and how to sort them when there are several ones on one place? That´s the question reaching almost to beginnings of...

By Jon Gabay @ digikey.com: Determining the state of our health has always been a matter of finding a way to monitor and measure the body’s most basic functions. Before instrumentation, visual indicators were used that allowed us to know, for example, what our body temperature...

by jckelley @ instructables.com: If you work in a company that has a website, you know how important it is that the website always be up and running. That's why you constantly see "99.99999% reliability!" all over the fancy server hosting sites. A website can't make money if the...

This is an internet speed Analyzer based on Raspberry Pi: This application will run speedtest-cli against speedtest.net's servers using cron. It will then email the results daily and weekly. Also - using http://www.percheron-electronics.uk/shop/ e-paper hat - you can utilize the...

by masteruan @ instructables.com: This tutorial will explain how to build a machine for biofeedback. But first a bit of theory. What is biofeedback? Biofeedback is the process of gaining greater awareness of many physiological functions primarily using instruments that provide...