WiMax antenna auto position finder

Wireless internet is almost everywhere but not always it is easy to catch quality signal. It is all about antenna design and positioning it. If you are too lazy to position antenna take a look at following project where simple solution and common found parts made simple bi-quad antenna auto-position itself to access point. Device is built around ATTiny2313 microcontroller that controls an old scanner stepper motor via ULN2003A. It seems that hardware part is finished while software is still under way. Hardware part is written mostly in Russian but I guess this is not big deal with auto-translator. Continue reading

BeagleBoard linux platform

Have you heard about BeagleBoard? If not then it is an open source single board computer with high performance OMAP3 (ARM-Cortex A8) processor that runs at 720MHz. Board is equipped with 2GB NAND and SRAM that is more than enough to run Linux applications. In this project you can go through the process of building a Linux platform with Touch display and battery pack what makes a device fully functional handheld portable device. The tutorial includes soldering required pins for BeagleTouch display and BeagleJuice battery pack. The Linux are booted from preformatted SD card. The interesting part of this is that assembling Beagleboard is compared to Arduino touchshield assembly. Continue reading

Accelerometer based sport analyzer

Well this is quite big project that include several microcontrollers including Microchip 18F, Texas Instrument DSP, also an Xbee transceiver. As this is a semester project it has a very detailed description of device working and building process that include making PCBs, building case with engraving. Sport accelerometer itself is used in athletics to determine their wrong foot steps especially near finish. Transmitter with accelerometer simple reads accelerometer data and then transmits it to computer with DSP. So coach can see when athlete makes a mistake (he even gets a sound signal when he does that) and can make corrections for the next time. Anyway if you aren’t interested in sport accelerometer itself, I encourage at least reading the PCB building process as it includes an oven soldering and other… Continue reading

Digital clock with discrete diodes

Building digital clocks is some sort of “Hello World!” project to most embedded hobbyists. And you can find tons of them with various displays and microcontrollers. But there is always a room for something different and unusual. So if you have spare 130 LEDs you can do same easily. The guy, who calls himself Syst3mX in instructables, has built a digital clock by using discrete LEDs and Arduino. He made something similar to seven segment display where distinct LEDs are aligned and controlled like it. Of course lighting up such a bunch of diodes requires more power so each segment is driven by transistor. The overall effect looks really great Continue reading

Arduino based Nixie tube display

Electronics projects with Nixie tubes look fantastic. This is why more and more enthusiasts use them in various projects like clocks or other text or numeric information displays. Driving Nixies is a bit complicated due to its nature where pretty high voltages are needed. When anode voltage is done then controlling display becomes easy with digital level signals. Like in this project a minimal Arduino setup works just great. The only thing that is left is to put everything in nice case and hang it to some special place. Author the project intent to attach an atomic clock receiver, and use Nixie display as nice looking accurate clock. Continue reading