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A very simple posture sensor for your chair
If your job involves sitting in front of a computer for long hours everyday, a poor posture might result in neck, shoulder, and back pain. Sitting up straight helps to get rid of some of these...
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Hackaday announces a hardware contest; the winner goes to space
Hackaday has announced an open hardware design contest today for the worldwide community of hackers and the grand prize winner will receive a free trip to space or $196,418 cash. We want the next...
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Distance meter using GPS and Arduino
A group of students at Indiana university has built an Arduino-based distance measuring tool as their class project. It is a handheld device that measures the distance between any two points using the...
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ATtiny85 based Compact Data Acquisition Device
This project, named IViny, is about an easy-to-build USB based data acquisition device using ATtiny85 MCU that communicates to a PC using V-USB. It is capable of logging data to the computer at 150...
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chipKIT Project 5: Digital stopwatch on seven segment LED display
In this project, we will use the chipKIT Uno32 board to build a digital stopwatch capable of timing minutes, seconds, and 1/10th of seconds, and with a basic start and stop control feature. A...
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ChronosMega: Another LED wrist watch
Designed by Nick, a BSEE student at Oakland University, ChronosMega is an Atmega328-based wrist watch that is battery-powered (3.7V rechargeable Li-Ion) and displays time (hours and minutes) in binary...
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BrickPi Bookreader version 2 can read a real book
BrickPi Bookreader 2 is a new version of BrickPi Bookreader and is capable to read aloud a real book and also to turn the pages of the book. The page turning mechanism is accomplished two EV3 motors,...
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Indoor/outdoor wireless thermometer using Arduino
This Arduino-based wireless thermometer uses two Arduino boards to measure indoor and outdoor temperatures. The outdoor Arduino board sends out the outdoor temperature measured by DS18B20 sensor to the...
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MSP430 driven RGB LED ring clock
This MSP430G2553-based attractive wall clock is comprised of 2 rings of 60 WS2812 RGB LEDs. The PCB ring was constructed by daisy-chaining small and identical arched PCB segment. Visit this...
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Piezoelectric power generator shoes
Check out this instructable on making piezoelectric shoe power generator from Angelo, a 15 year old kid, who is also participating in the Google’s 2014 science fair with this project. Piezoelectric...
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PhidgetSBC3 based solar-powered weather station
This instructable describes in detail the setting up a full-featured weather station that records air temperature, relative humidity, and ground surface temperature right below the weather station. The...
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MikroElektronika celebrates 10 years of success in compiler development
MikroElektronika, a Belgrade, Serbia-based company, which is widely known for manufacturing a wide range of microcontroller development boards and compilers, is celebrating 10 years of success in...
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DIY lock-in amplifier using the AD630 balanced modulator
Lock-in amplifiers are used to detect and measure very small AC signals which are buried in an overwhelming noise. For example, consider a case where you want to single out a 5 mV sine wave from a...
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DC booster for your 12V load
This 12V DC booster circuit uses the MC34063A device which contains all the primary functions required for DC−to−DC converters. It has a built-in temperature compensated reference, comparator,...
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Single and multi-phase AC induction motor control using the PIC16F1509...
This application note from Microchip provides a detailed analysis of driving a single and multi-phase AC induction motor using the 8-bit PIC microcontrollers. It shows how to build a low-cost...
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RFID access control for garage door
Jason Hamilton has built this Arduino-based RFID access control to open his garage door using RFID. The project has a master RFID key hard-coded into the Arduino firmware, which allows you to add other...
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MM74C922N-based encoded matrix keypad
Matrix keypads are an excellent way of providing user input data into microcontroller-based systems. Keypads find applications in remote controls, standalone data-loggers, security systems, door entry...
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Supercapacitors for reliable backup power in embedded systems
From Samuel Nork’s article “Supercap backup circuit provides reliable uninterrupted power” Temporary backup power is a common requirement for a wide range of applications whenever the main power source...
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Switching regulators guide
From Jim Williams’s application note on Switching Regulators for Poets:
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Techniques of current sensing
Current sensing is a fundamental requirement in many electronics applications. Linear Technology has this application note on collection of current sensing circuits that have been compiled from...
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