Ammeter based Clock

This is totally a different project and a very cool idea to implement. The project is about using ammeter to display the time by changing the amount of current entering through it. Moreover, this one also doesn’t require modification to the ammeter unlike the other projects which normally involve replacing the face plate of the meter. The project utilizes a 0-100mA meter which are easily available on the internet at a very cheap price. In addition to the meter, it utilizes an Arduino Pro mini and Ohm’s law to vary the current. The Arduino generates a PWM to vary the viable voltage over a resistor which is connected to the meter. The current generated, in principle with the Ohm’s law, would be scaled in such a path as to move the needle on the meter to the comparing hour, moment, or second. For the second and minute meters a NPN transistor was used in switching mode to deliver more current. A high precision RTC named ChronoDot has been used to keep track of the time and is easily available online.… Continue reading

Arduino LED clock with half hour accuracy

Some people like to know exact time (hours, minutes and event seconds) while other are satisfied with “around” time. So this project might be just right. It is fairly easy to build since there are only twelve single color LEDs used. NextLab did their job to the end – instead of leaving circuit open, they laser cut nice acrylic enclosure that makes this clock stand out. Clock is powered by Arduino Nano. Even if displayed time accuracy is half an hour, internal time is kept precisely with external RTC DS1307 chip. The motivation of this is that platform can be used for future projects where someone might want to build accurate display like using RGB LEDs or different methods. Continue reading

TV Remote Controlled Clock

This project is about controlling a clock, using a TV remote and not using push-buttons to reset, or stop the timer. To get the time and date information, I am using DS1307 I2C Real Time Clock from Maxim Integrated. The clock and calendar provides seconds, minutes, hours, day, date, year and month information. The main clock is displayed on sets of seven segments multiplexed together, however for navigation purposes, a character based LCD was also attached so as to make navigation easier. The multiplexing of seven segments is done by using two sets of shift register which seems to be a good solution when you are short on pins.  The IR receiver used is TSOP 4838 IR Receiver which is used to receive from remote control of consumer electronics such as TV and demodulate them to get the signals. A set of libraries available were used to decode the demodulated information, since different TV remotes work on different protocol. Apart from it it also has a temperature sensor. A really good project on application of multiplexing that can be done… Continue reading

Network enabled Arduino VFD clock

Pyrofer wanted to build a clock that would fit his needs. He wanted that it would adjust time and daylight savings automatically and could be customizable. So he grabbed Arduino, 14 character VFD display which he scavenged from old fruit machine. Attached WizNet5100 network adapter board and additionally placed Dallas 1-wire temperature sensor. He configured network to be DHCP so no additional configurations wouldn’t be needed. Clock sets itself via NTP so no buttons are required. It sets adjust itself every 24 hours. He created a webpage where he could monitor time, temperature and probably other future parameters like humidity. Having data stream via HTTP and SNTP there is no problem to log and graph data over time. All is needed now – a proper enclosure. Continue reading

Dotclock – an open source hackable clock

To make another digital clock that is’t boring you must try hard. Dotclock project seems to be one of these clocks that pretend to be interesting and different. Despite its nice design it’s functionality is also cool. Great and simple design goes along with cool functionality. It uses a series of animations to tell time. Animation bits are taken from various well known classic games like Pong, Tetris, Pacman and Sspace Invaders. DOTKLOK: Game Time from The Latest Artists on Vimeo. Clock is built around Atmega328 microcontroller with Arduino bootloader. Time is displayed on dot Led matrix. So it is easy to hack, modify or blow your own clock code. As usually clock uses a DS1307 RTC chip to display correct time over time. If you are interested in this project, there are ready pieces to purchase. Continue reading

This time linear clock

Probably you noticed several digitally controlled analog meter clock. These are cool stuff. Anyway analog meters are close to real mechanical clocks in their appearance. What if make clock linear where hour and minute numbers are aligned as in ruler? Euphy has built one that looks very similar as ruler, but if you look closer you’ll find two markers sliding along indicating hours and minutes. He put some work on it especially on mechanical side. The clock is controlled by Arduino and Adafruit motor shield, that takes care of two DC motors moving hours and minutes markers. Thumbs up for great idea! Continue reading