![]() ![]() Digital compass: MAG3110 (bought an assembled one from ebay): I have tried other digital compass a couple years ago but couldn't make it work.There are a number of small Arduino compatible boards in the market so pick anything small that can be hidden behind the LCD. ![]() JeonLab mini v1.3: This is a minimalist Arduino board I made.LCD: 16x2 HD44780 LCD (white text on blue background): This is pretty popular LCD that you can find and buy easily.Unfortunately I didn't take a lot of pictures when I assembled the electronic parts, but I'm sure someone who are interested in making one of these will be able to follow easily the schematic diagram I will show in a couple of steps later. The picture shown in this Intro page is the fully assembled and mounted on top of the interior mirror of my car showing the bearing, angle and current interior temperature. I still have more than a few pins available and have a plan to add more sensors such as an exterior thermometer, anti-theft device, etc. I started with very basic function, showing bearing and heading angle from a digital magnetometer on an LCD, but there are a number of digital and analog pins are left unused on the microcontroller (Arduino compatible, JeonLab mini) so I added a digital temperature sensor and a phototransistor to adjust the brightness of the backlight (single LED) of the LCD. So, I decided to make a digital compass for my car. Well, first off, I like gadgets and if I can make one, that will be much better to enjoy it. These days, GPS navigation systems are getting more popular, so probably some people would say why I need a compass. I'm not really good at finding places and direction but at least I'm able to read maps and compass. ![]()
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