Tag Archives: Arduino project


Automation of an old-school knob-turny style AC unit

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If you have an old-school knob-turny style window AC unit that is still in working condition, you might want to read this article from Phil Rowe who talks about how he reinvigorated his old AC unit to a fully automated AC system using Arduino. He writes,

This article covers the development of an Arduino controlled air conditioning system. It converts an old school, in-window, air conditioner (AC) which was in a very hard to reach spot to an automatic system which can be activated and monitored from MegunoLink Pro at your desk. The system consists of an Arduino Uno, a servo driven mechanism to active the AC, a DS18B20 temperature sensor, and MegunoLink Pro to plot the temperature and control the set points.

 

Automation of an old-school AC unit

Automation of an old-school AC unit

Arduino powered liquid/powder dispenser system

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An accurate dispenser system for liquids and powder using Arduino.

Arduino dispenser system

Arduino dispenser system

First things first, let’s put together the interface. It will make some of the calibration steps later a little easier. Starting with the LCD screen, and associated potentiometer dial (put on the pump circuit board), wire up a breadboard according to the diagram above. The potentiometer is only there to control the contrast on the screen, so it doesn’t need to be on the front panel, cramping the rest of the interface.

Next comes the buttons. The two little button were salvaged from the scale circuit board, so you can wait to put them in unless you have other buttons you’d rather use (bigger buttons might suit your fingers better). The green button is the GO button, the red button is the STOP button, and the yellow button is the OK button for menu navigation. The two little buttons are used as LEFT (cyan) and RIGHT (purple) to navigate the menus. Wire them up like the left breadboard in the diagram above.

Yet another GPS tracker

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Here is another GPS tracker using Arduino that is aimed to assist people suffering from Alzheimer and Dementia by notifying their caretakers about their location. It consists of a GPS module, GSM module, Arduino and batteries all enclosed in a 3D printed case. When the GPS module is not within a user-specified boundary, the device will send a text message alert.

GPS tracker for

GPS tracker to assist people suffering from Alzheimer

DIY GPS navigation using Arduino

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This DIY GPS navigation system is built under $25 and uses Arduino with a GPS module and a 320*240 TFT to display the topographical maps stored as BMP files on an SD card.

Based on the combination of TFT module and Arduino UNO fram Banggood and the GPS module from the same supplier I built a basic GPS navigation system that uses the topographical maps of The Netherlands (top25raster). In total there are 304 bmp files on an SD card, so the images are very detailed! In principle any 8 bit bmp map can be used. The maps were obtained from www.kadaster.nl, the software is based upon modules from Adafruit.
Sketch plus explanation are available on Github: middelbh/GPSnavigator.
Enjoy and please inform me about optimisations!

DIY GPS system using Arduino

DIY GPS system using Arduino

Arduino banana piano

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Stian Eikeland’s capacitive touch banana piano is really cool.

Capacitive touch banana piano

Capacitive touch banana piano

Check out the demo here:

This weekend my niece-in-law is staying over, and to maintain my image as the crazy scientist uncle I’ve planned to make a banana piano (and lots of weird ice creams). In clojure there’s a pretty cool programmable audio environment called Overtone. Overtone features a decent sampled piano, and I’m thinking this could be a great basis for a banana-piano.There’s a couple of ways we can make bananas act as tangents, one of them is to use the bananas as capacitive touch sensors. Using a nice little hack it’s possible to do this using regular digital pins on a microcontroller. The hack is (afaik) originally from Mario Becker, Fraunhofer IGD, 2007 (website dead). Check out the article on capacitive sensors over at arduino.cc.

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