Posts Tagged ‘rtc’

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Clock

February 15, 2015

Wanting a clock for my work area, I made one using a ChronoDot RTC , or real time clock, and a 7 segment display.  I had the box custom 3d printed on Makexyz.com.  The lid slides off, out the back.

I used an old Arduino Deumilanove because I will need to change the time for daylight savings and want an easy way to do that.  If I had used one of my stand alone Arduinos, that would mean removing the chip and putting in another Arduino and then updating the time from the computer.  This way I can just connect the clock to the computer without the need to remove the chip.

I also added a light sensor to automatically adjust the brightness of the display.

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Clock

December 10, 2012
Clock Front

Clock Front

I just finished making a clock for my work area using a 7 segment display,   RTC (real time clock) and the RTC library.  The nice thing about using this RTC is that it has a backup battery so if you lose power, it still maintains the time.

I already had a standalone Arduino not being used, so I just used that. The code could use some work, but it works for now.

Fairly easy setup.  Both the RTC and the 7 segment display use 12c to communicate with the Arduino.  Because they have different addresses this is ok.  Adafruit has this handy chart of a lot of sensors and things and what their addresses are.    The 7 segment display I used has an address of 0x70 and that is not yet on the chart, but can be found in the library RTClib.

If I ever get a 3D printer, this would be a good project to make a case for.

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Lucky Panda Fortune Teller

January 16, 2012

Lucky PandaI finally finished this project. I had previously made a much smaller version with only a LCD screen, but no printer as they were not available at the time.

First I started out getting the thermal printer to work with an Arduino and a LCD screen.

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