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]
This project is a simple alarm clock based on PIC16F84A mcu. This clock counts seconds, minutes, hours and day of the week. Time is displayed on 4 seven segment LED displays, and is adjustable with three buttons at start time (up, down, enter). You can program the day of the week, hour, minute and duration of the alarms. Check schematic and source code on the link below.
A PIC16F84A Alarm Clock – [Link]
This is a clock based on AVR Attiny2313 and works in 24 hour period. The time is displayed in the format “hh: mm: ss” on the alphanumeric display of size 16 x 2 (columns x rows) with driver HD44780.
Clock based on the chip AVR Attiny2313 – [Link]
An Alarm clock with 6 CD jewel boxes mounted as a cube, using 2 X 12 leds as display and the ringer made with a spinning motor and a glass. It is based on the ATtiny2313 micro from Atmel and the schematic diagram and the ‘C’ sources for the project are freely downloadable.
Roboclock. 2 x 12 leds alarm clock with glass ringer - [Link]
TeenyChron project is a clock that pulls time from a NTP server and uses a Garmin GPS module, a TS-7400 single board and two displays to display both UTC and local time. The heart of the system is a single board computer based upon an ARM processor running Linux. This project is well documented and you can find more information on the link below. [via]
TeenyChron: A Linux-based GPS-synched NTP server – [Link]
Kenneth Finnegan build a Bicolor LED clock based on MSP430. Project is developed using low cost Launchpad development platform from TEXAS Instruments. The MSP430 microcontroller is designed for low-power battery applications. The clock is controlled using a push button and a toggle switch. To display the time the LED is flashing in two different colors. Green flashes mean 10, yellow 5, and red 1, so the time 5:28 would be displayed as YELLOW [PAUSE] GREEN GREEN YELLOW RED RED RED (5:10+10+5+1+1+1) [via]
MSP430 Bicolor LED Clock – [Link]