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4 Jun 2014


sameer @ sgprojects.co.in writes:

Here I’m introducing a simple and very useful project to store the running time of any device. The running time in minutes can be seen on a 7-segment display and can be reset at any time to it’s initial zero condition by pressing a switch. It can be easily installed by connecting it in parallel with any device.

Digital Time Keeper - [Link]

12 Mar 2012

Matthias Franz writes:

The time manipulator is the little brother of the time signal transmitter located in Mainflingen close to Frankfurt in Germany. The very low frequency transmitter  located there has an output power of 50 kW and is called, in accordance to its call sign, DCF77 (similar to HBG, MSF, RWM and WWV, WWVB, WWVH). The transmitter is operated by the Media Broadcast GmbH and transmits on 77.5 kHz the official time signal for Germany. The medium range is stated with 2’000 km.

My time manipulator however offers some more functionalities. It’s the true alternative if you have difficulties to find your flux capacitor or your local electricity supplier canceled your contract after you had difficulties to pay off for the 1.21 GW.

Homemade 77.5 kHz DCF77 time signal transmitter - [Link]

21 Jan 2012

What’s inside the FE-5680A Rubidium frequency standard? Available on ebay for about $50 or so.

PART 1: http://www.youtube.com/watch?v=I55uLRRvLCU

FE-5680A Rubidium Standard Teardown - [Link]

3 May 2011

Paul Asselin says:

I wanted to know how much time I was spending under the shower each day, especially in these environmentally conscious times. The benefits of that are that I can perhaps save some money on the water bills and also study the effect of temperature on my showering time.

So Paul designed this Arduino shower timer analyzer. He considered using a water flow meter, but opted instead for using an RFID reader and a Real Time Clock (RTC). He waives his RFID card before the reader upon entering the shower which starts the timer. When he leaves the RFID reader again detects the card and stops the time. The duration is then uploaded to the Thingspeak website’s API section via an ethernet shield. [via]

This was Paul’s entry into the Thingspeak contest.

Arduino shower time analyzer – [Link]

18 Mar 2011

adafruit.com writes:

In honor of the new chronodot, we’ve put the brains behind the chip (The maxim DS3231) into our partfinder! This is a high precision ‘big brother’ to the DS1307. It has a built in temperature compensated oscillator so that its very precise. They are a bit chunky but good when you want to really keep track of time and cant integrate a GPS module.

DS3231 – High precision real time clock with built in oscillator – [Link]

28 Sep 2010

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]

21 Aug 2010

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]

3 Aug 2008

The High Altitude Photographic Balloon use a Parallax BS2px and is responsible for reading and recording latitude, longitude, time, altitude, internal capsule temperature, external capsule temperature, and taking pictures. Additional responsibilities include managing memory storage, relay controls, and audible signals. [via]

High Altitude Photographic Balloon - [Link]

9 Apr 2008

This clock uses an old monitor and a PIC chip to display the time in a fantastic, old-school, way. The schematics and code are available online. If you have an old monitor, this could be a fun project to display the time in your lab.

This piece of software generates a standard VGA signal, displaying in it a standard 6-digit date-time clock. The chosen color is green, but it can easily changed to red or blue (no gradients, unfortunately). Its use could be the creation of a big, luminous wall-clock, by using old VGA monitors ready to be dismissed. Or, brand new flat LCDs, if you feel like! [via]

VGA clock with USB interface - [Link]





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