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bzijlstra

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Joined: 30 Dec 2004
Posts: 1179
Location: Tilburg - Netherlands

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PostPosted: Sun Mar 17, 2013 8:11 am    Post subject: WordClock with temperature and humidity Reply with quote

We put a DHT11 sensor on location JP1 and from www.AVRprojects.ru we have download software to read the DHT11.



Now we got the time and date from the DS1338-33 and temperature and humidity from a DHT11.

Time to make a WordClock. Fontsize 25x32. So on a 800 x 480 pixel display we can make 13 lines of 31 characters.
It is a running clock, the text is refreshed three times a minute so it is very dynamic.
In real the blue is less intensive.



Code follows.

Have fun
Ben Zijlstra
Theo Kleijn
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Paulvk

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Joined: 28 Jul 2006
Posts: 1111
Location: SYDNEY

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PostPosted: Sun Mar 17, 2013 9:44 am    Post subject: Reply with quote

Nice project Ben Very Happy

Have you checked the accuracy of the DHT11 , I can not get valid readings when I compare them to my wet/dry bulb hygrometer which is an actual meteorological instrument ?

Regards Paul
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bzijlstra

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Joined: 30 Dec 2004
Posts: 1179
Location: Tilburg - Netherlands

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PostPosted: Sun Mar 17, 2013 8:55 pm    Post subject: iTrax300 GPS module Reply with quote

The next step is the iTrax300 GPS module. It is the WIZFI210 or the Itrax300 GPS module, they are on the same serial lines.







Same trick to connect a PC direct to the iTrax300 module.



Here the output of the module.

Have fun
Ben Zijlstra
Theo Kleijn
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bzijlstra

Bascom Ambassador



Joined: 30 Dec 2004
Posts: 1179
Location: Tilburg - Netherlands

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PostPosted: Sun Mar 17, 2013 9:12 pm    Post subject: TSR 1-2450 instead of 7805 Reply with quote

Using a switch mode regulator

There is a switched mode regulator available which is pin compatible with the 7805 regulator and a similar size. The 7805 regulator is supposed to be roughly 55% efficient where as the switch mode regulator TSR 1-2450 is supposed to be roughly 95% efficient.



Due to the backlight of the display, the 7805 got warm/hot, with the TSR 1-2450 no problem.

Have fun
Ben Zijlstra
Theo Kleijn
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albertsm

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Joined: 09 Apr 2004
Posts: 4747
Location: Holland

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PostPosted: Mon Mar 18, 2013 10:36 am    Post subject: Reply with quote

I love that clock.
And thanks for the info about the traco power chip and GPRS module.
You say they share the same line, but when connecting to the PC right? According to the circuit they seem to have their own connection to the processor module.

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Mark
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bzijlstra

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Joined: 30 Dec 2004
Posts: 1179
Location: Tilburg - Netherlands

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PostPosted: Fri Mar 29, 2013 6:48 am    Post subject: Source WordClock with temperature and humidity Reply with quote

Here the source of our Easter Word Clock.

Have fun
Ben Zijlstra
Theo Kleijn

Easter project 2013
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albertsm

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Joined: 09 Apr 2004
Posts: 4747
Location: Holland

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PostPosted: Sat Mar 30, 2013 12:38 pm    Post subject: Reply with quote

hi Ben & Theo,

thanks for the source, that is indeed a nice project for this Easter Smile
Wish you Happy Easter !

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Mark
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