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“There are many ways (*) to drive the 6-digit 14-segment common cathode display from Seeed Studio. This time I chose to multiplex two MAX7221, a method described here (but used for driving a bi-color 8x8 LED matrix).”

“I guess everybody knows those remote controlled switches that in their simplest form come in a couple (mostly 3) of switcheable devices to plug into the mains outlet and that will receive a plug of a lamp or something and …

“The circuit below is used to connect a relay to the arduino UNO to control high voltage electronics.”

“Also known as Cows and Bulls or Pigs and Bulls or Bulls and Cleots) is an old code-breaking mind or paper and pencil game for two or more players, predating the similar commercially marketed board game Mastermind. It is a …

“Hello! It’s been a while I’ve didn’t posted anything on Instructables, but now I made a simple project that I’ve seen on internet in various forms. I managed to build a code using other codes I …

“This project describes the design of a very low budget 3D Printer that is mainly built out of recycled electronic components. The result is a small format printer for less than 100$. First of all, we learn how a generic …

“Taking on the task started with me thinking ‘Hey, I could make a smaller LED cube using SMD LEDs”. Yes, the idea was to solder the surface mount LEDs in space! And yes I did it (the “Why” question remains …

“Industrial torque meters cost a lot ($4500). I’ll show you how to build a low buck version with an Arduino. Why? Because I want to test power tools to see if the actual specs live up to the marketing …

“At Interactive Objects, we needed a new business card. Business cards have been the method of leaving a token for keeping in touch. Despite all the prophets declaring it dead every decade with vCards, Bumps, etc., the traditional, physical business …

“This tutorial gives provides the steps to set up, program, and test an ATtiny44/45/84/85 with an Arduino. It is also provides some explanations as to the inner workings of AVR chips in general.”