This project is a clock able to display time on the CRT tube of an oscilloscope. It uses a PIC16F84A and four resistors configured to work like a 2bit R-2R DAC. Bruno Gavand used both timing and Y axis controls to display the numeric values on the scope screen. It also has two push buttons, one for hours and one for minutes configuration. [via]
PicOClock: PIC16F84A Oscilloscope clock – [Link]
This project is a Real time clock shield for Arduino based on DS1307 realtime (RTC) integrated circuit. It is a fairly accurate clock that can keep time when not powered if you add a 3V battery. Data is transfered to microcontroller through I²C bidirectional interface. It is connected to Arduino at pins 4 and 5. Check schematic on the link below.
Arduino DS1307 Real Time Clock Shield - [Link]
This project is a Digital clock that is able to show time in both a LCD display and in LED display binary output. It also has a thermometer and a hygrometer able to show relative humidity and absolutely humidity. It is build around Microchip PIC16F917, a RealTimeClock Maxim DS1305 and Sensirion SHT11.
Digital & Binary clock with thermometer & hygrometer – [Link]
This project is an alarm clock based on PIC16F877. Time keeping is done using the PIC’s timer0 interrupt and uses a 4×20 hd44780 compatible backlit LCD. It also has computer interface for synchronizing time with the web.
PIC16F877 Alarm clock - [Link]
This project is a 16×2 LCD Clock based on ATTtiny2313 microcontroller. The time is kept using internal counters of the mcu using interrupts and has an accuracy of 1 second / 48 hours. The 16 bit counter of the AVR is set to overflow when a second had lapsed and thus measuring time. Project files can be downloaded here. [via]
Interrupt driven Clock using ATTtiny2313 - [Link]
The National Physics Laboratory broadcasts a time signal, previously known as the Rugby clock but now called “Time from NPL.” Its most commonly known as the MSF signal due to it originally being identified in Morse code those letters. It is broadcast from Anthorn on 60kHz. Many commercial clocks use it to automatically set themselves.
I decided to convert a digital clock I bought into one set by the MSF signal. To make the project more interesting I decided to use the ATtiny2313 microcontroller with only 2k flash ROM and 128 bytes of RAM.
MSF Radio Time Clock - [Link]
This project shows how to build a Digital clock with 32×8 LED matrix display based on ATmega168 microcontroller. It doesn’t use a RTC timer chip but timer interrupt triggered via external crystal at 32.678kHz. It allows generating exact 1sec intervals while AVR is running with internal system clock at 8MHz.
Digital clock with 32×8 LED matrix display - [Link]
Garrett Mace of macetech.com has announced his first open source hardware project with the release of ChronoDot.
Over the past few years, a lot of small electronics hardware businesses have been starting up. Many of the more successful businesses and projects have adopted “open-source” philosophy into some or all of their products. Open-source concepts have been in existence for a long time…it’s human nature to share information and explain how we made something. At the same time, there is what appears to be a conflicting desire to keep processes secret in fear of duplication.
So our first open-source product is a pretty simple design, the ChronoDot RTC breakout board based on the Maxim D3231 temperature compensated realtime clock chip. Design files for Eagle are included on the product page, or at this link: http://macetech.com/oshw/ChronoDotDesignFiles.zip
ChronoDot is now Open Source - [Link]
This project shows how to build a LED clock that simulates the hands of a traditional clock using rows of LEDs. It also has a ‘digital’ mode, where the LEDs are used to display the time in digital way. Clock is based on PIC 16f877 microcontroller. Check schematics and construction details on the link below. [via]
‘Analog’ LED Clock - [Link]
This is a really impressive clock made using 60 RGB SMD Leds, making any color palette possible. It uses an Arduino, 12 LED drivers and 60 RGB Leds. All the functions of the clock are controlled via a capacitance switch that is hidden behind the infinity logo at the bottom of the clock. [via]
In this version of the software the color palette cycles through the colors of the rainbow twice a day. There is a light sensor to make sure that the intensity is tuned down in the dark.
Equinox Clock - [Link]