After doing the Scope clock project I was feeling in an “antique mood”. So I bought some big nixie tubes on eBay from Russia and also I bought the nixie tube driver. It’s a 74141 and it can handle 200 volts!
Nixie Clock – [Link]
I got this idea by browsing the web. I found by hazard Mr. Bob Blick’s page who make the first propeller clock. I began to check how can I build one myself. Base on AVR AT90S2313 I saw rapidly that my MCU must be clocked very fast to make all the calculations needed to light the leds at the right place. The speed is at 16Mhz, 4 times faster than Atmel’s specifications. It’s working without any problems.
Propeller Clock – [Link]
Atomic clocks keep the world’s processes on track—providing a universal time base with which everything from satellite communications to demolition explosions are synchronized. Now chip-scale atomic clocks are small enough to install inside mobile devices.
Symmetricom atomic clock on a chip based on Sandia National Laboratories technology (Source: Symmetricom)
Today accurate atomic clock readings are most commonly obtained from global positioning system (GPS) signals, but a new atomic clock on a chip will work where GPS does not reach, such as indoors, in tunnels, underground, under the sea and in outer space. [via]
Smarter Atomic Clock on a Chip Debuts – [Link]
This project would be about medium level for a novice, but *hopefully* still provide somewhat of a challenge for more experienced users, as they get into the code and work on improving this. “This” that I have mentioned multiple times, is an Arduino clock, based off of a 4 digit display. I have named this project the “TimeDuino” (but if you have a better name, do not hesitate to add it in the comments!). Its a simple 4 digit clock, driven with Arduino and transistors. Well, enough boring you with the introduction, lets get to the project!
TimeDuino- Arduino based clock using 7 segment displays – [Link]
Propeller clocks are nothing new to anyone who has been into electronics for a while. They use an idea called POV, Persistence Of Vision, which means that if something appears in the same spot consistently, at least 50-60 times per second, our brains think that it’s permanently there when it really is not. TV’s and Monitors use this method of display, so it’s not as uncommon as you might think.
After having seen so many propeller clock POV videos on Youtube, but no real description of how they work or how to build your own, I set out to make one and document how it was built. The Pyro Propeller Clock POV design criteria was short and sweet: be as simple as possible in order to encourage others to make their own, DIY style.
Pyro Propeller Clock POV – [Link]
After staring at the Union Square clock about 100 times, I decided to replicate it at home, so that I can watch the digits scroll by on my desktop. I named the clock after one of my favorite quotes from the video game Call of Duty: Black Ops, where the protagonist is politely asked for the meaning of a certain set of numbers which are being displayed on Nixie tubes. I feel it fits the piece, as even some native New Yorkers mistakenly believe that the display is the debt clock or something (that’s over in Midtown).
As a review, the clock is read like so: hh:mm:ss:msm:ss:mm:hh, which means that the time is read normally at first (military time), then it goes into milliseconds, then backwards milliseconds, then seconds, minutes and hours until midnight, in that order. Int he example picture, it is 19:30 with 9 seconds and 9 tenths of a second, the middle is usually a blur (set to hundredth of a second), then its 4 hours, 29 minutes, 50 seconds and 9 tenths of a second until midnight.
Fifteen-Digit Nixie Clock – [Link]
This prototype clock from UK designers James Auger and Jimmy Loizeau is powered by a microbial fuel cell. It features a conveyor belt of flypaper that attracts flies and drops their bodies into the fuel cell. Depending on the available fly supply, the process can generate enough power to sustain itself and power a digital clock, as well. [via]
A Clock That Eats Flies – [Link]