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The centerpiece of this clock kit is the vintage-style 8-character display HDSP-2534 originally from HP, currently manufactured by Avago. The assembled clock looks like in the photo below. The dock, not included in the kit, is a miniB USB phone charger; it can be easily sourced from ebay , if you don't already have one. (You can even get a fancy one, e.g. custom-made exotic wood, on etsy.com .) The kit includes the following components: PCB; ATmega328P, with bootloader and fuses for 8MHz internal clock, and the sketch preloaded (also downloadable from here ); HDSP-2534 display ; 595 shift register; DS1307 real time clock; 32kHz crystal CR1220 battery; battery holder; push buttons (x2); capacitor 100nF (x3); 10k resistor (x3); 28-pin socket; 16-pin socket; 8-pin socket; 6-pin machined female header (x4).    $40, free shipping to North America Note: The kit is currently out of stock. Please send me an email (my address is in the top right corner of the page) if you want one. I will

As I pointed out in my review on Safecast bGeigie Nano kit, the size of the current software already reached the limit of processor's program memory of 30KB or so. From this point on, it is difficult (if not impossible) to add new code features, and that may require drastic code optimization or even disabling existing features. I thought that the easiest solution to keep this project up-to-date is by upgrading the processor, by entirely replacing the Fio board with an ATmega 644P plus a few extra components (e.g. LiPo charger). This makes the kit a bit more challenging to build, since it requires soldering SMD components, but could also save a few bucks. The device is still Arduino-compatible and programmable, like to Fio, using the FTDI breakout . Updated Jul 11, 2014 : As Rob suggested, I added the XBee module as well. New Eagle files are here . This is how the bGeigie Nano Plus PCB looks now. (I also added an option for the Fastrax UP501 module, a bit cheaper then the Ultim

Hello friends, today I am going to tell you how to backtrack emails received. Emails information are stored in headers of email, reading which one can easily tack email messages, along with sender's location and IP address. Read more »

This latest code release includes: introduction of the two-faced (Kandinsky) feature, on 2 or 4 displays; fixes related to screen centering for 3 or 4 displays (Big, Stopwatch etc); fix for Pacman app on 3/4 displays; fix for Words app on 3/4 displays (so the text does not start scrolling in the middle of the screen); improved the font definition for digits (effectively making them 5x7 pixels; see photo below); fix for Score app (swapped button functions); I am sure that there are still a few bugs to fix. As well, some improvements would be nice, the most notable being the better use of a screen with 3 or 4 displays, especially for the Big mode, where the time is still shown on the (center) 2 displays. (This would call for spreading out of the digits, or even the definition of a wider font.) (One of the displays in the 3-display clock is faulty, hence the missing pixel in the bottom 1.)