Simple Tutorial on interfacing 5×7 dot matrix display with AVR

Dot matrix displays are common display types in electronics. They are used where simple pseudo-graphics information need to be indicated.  Controlling dot matrix display is quite easy because it is nothing more than LED array. Anyway there are some points to keep in mind to make things easier. In this project you will find out how to connect 5×7 dot matrix displays to AVR microcontroller and display information by scanning lines at some frequency – as you know these works dynamically to fool your eyes. Simple code snippet will give some starting point. Continue reading

LED cube not like others

Probably you’ve seen many LED cube projects – they all look cool. But to make a LED cube you need hell a lot LEDs and patience when soldering them. Any way results always pays off. But you know to make LED cube you can go different way – build a single plane of LEDs and then shake it at some frequency along with lighting sync. This is a very original idea of using simple shaker to 3D make cube effect of 2D LED matrix. The circuit with AVR controlled LEDS is fixed on Slotted steel which one end is also fixed to the table. Down below is a motor that rotates a weight on its shaft this way creating vibrations of 10Hz. Photo sensor detects the vibrating top point and … Continue reading

Get your right medication in time with Automatic Medication Dispenser

I believe many people are on some medications or other vitamins. So this project might be interesting for those “nerdy” ones who like everything to be scientific and technical. Automatic medical dispenser is an AVR based machine which automatically gives a pill at a time when needed. So no confusion or forgetting. It has running calendar and clock to track time, while correct pills are dispensed from CNC milled drums. Machine working idea is pretty simple. It has seven drums for each weekday and each drum has four compartments to store pills. Medication time can be set with two buttons and LCD menu. So when there is a time to take a pill – dispenser drops pills and sounds alarm. After you take pills you stop alarm by pushing a … Continue reading

Arduino based automatic flying drone

This drone is an evolutionary project which now came to III stage. It has quite a bunch of sensors stuffed in that allows it to fly automatically. Sonar and infrared distance sensors allows drone to hold fixed altitude and avoid obstacles. Drone navigates with GPS receiver that allows to program its flight patterns. The main board of drone is ArduPilot Mega – a specially designed Arduino hardware for autopilot tasks. Working prototype looks really impressive – probably because we used to see wheeled robots that avoid obstacles and can operate without remote control. Who said that only military drones can do this…? Continue reading

Try Arduino robot via Web interface

Yes it’s real. You can open a web page and start controlling this amazing robot hand. In the web page control panel you can move objects with robot arm or simply change light colors within RGB scale. You can Robot actions through web cam. Orbduino robot is callable and probably will be enhanced in future. Project is constantly updating by adding various new features and fixes. Core of robot is based on Arduino Duemilanove board equipped with Ethernet shield. Also there is a temperature sensor that allows reading room temperature. Locally robot is equipped with LCD, which displays messages of robot action. So hurry up to try this one, who knows how long it will be live. Continue reading