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DIY Moving Message Display
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bhq



Joined: 11 Jun 2008
Posts: 81
Helped: 7
Post18 Aug 2008 20:33   Re: DIY Moving Message Display
Please write your code in C and use keil 7.0 for moving message display
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blueroomelectronics



Joined: 17 Sep 2006
Posts: 1229
Helped: 60
Location: Toronto, Canada
Post18 Aug 2008 21:28   Re: DIY Moving Message Display
bhq wrote:
Please write your code in C and use keil 7.0 for moving message display


Huh? What?
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yupng



Joined: 16 Jul 2008
Posts: 33
Post25 Aug 2008 9:10   Re: DIY Moving Message Display
HELP.....wireless control announcement board using Dot-Matrix.
Any ideal.....
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yupng



Joined: 16 Jul 2008
Posts: 33
Post22 Sep 2008 20:02   Re: DIY Moving Message Display
RS232 port with wireless.....any idea???anyone can help?
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electronicus



Joined: 19 Aug 2005
Posts: 171
Helped: 12
Post22 Sep 2008 20:40   Re: DIY Moving Message Display
yupng wrote:
RS232 port with wireless.....any idea???anyone can help?

Here your are. Tested. Work perfectly.

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yupng



Joined: 16 Jul 2008
Posts: 33
Post26 Sep 2008 15:02   Re: DIY Moving Message Display
electronicus wrote:
yupng wrote:
RS232 port with wireless.....any idea???anyone can help?

Here your are. Tested. Work perfectly.

Thanks.....is good information.
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shahrol_hisham



Joined: 01 Aug 2002
Posts: 93
Location: malaysia
Post26 Sep 2008 17:33   Re: DIY Moving Message Display
Hi....

This the word format i take from web:
http://home.wanadoo.nl/electro1/avr/dotmatrix.htm

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yupng



Joined: 16 Jul 2008
Posts: 33
Post02 Oct 2008 12:20   Re: DIY Moving Message Display
I am trying to build an Infrared Transmitter and receiver that will take an RS-232 signal, convert it into TTL, then Pulse Width Modulation would be applied, and then finally transmitted. On the reciever side, basically extracting the orignal TTL signal from the Pulse Width Modulated signal and converting it back to RS-232.
Anyone can give me some guidance about this project?
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yupng



Joined: 16 Jul 2008
Posts: 33
Post21 Oct 2008 9:13   Re: DIY Moving Message Display
Anyone know how to transmit the data using RS232 port with Infarad? No cable is used.
For Example:
i already built a dot-matrix display project which the data transfer from RS232 port to dot-matrix display device with using cable connect between them.
So now, no cable is used to transfer the data. Only transfer data wireless(any wireles type but prefer IR).
Anyone can teach me how 2 do it?
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gringo_oh



Joined: 28 Nov 2006
Posts: 1
Post19 Nov 2008 17:53   Re: DIY Moving Message Display
Hi,

I have a problem with the moving message display with 89S52.

I use TPIC6B595 for driving the rows and the same IC's for the colums.

The schematic and software work in Proteus but in reality it doesn't work. the problem is with the rows, it's like all rows are on at the same time.

I can't get still letter ...

Can anyone help me?
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mansoorkhawar



Joined: 16 Feb 2007
Posts: 3
Post20 Nov 2008 6:01   Re: DIY Moving Message Display
Send me the code and schematic.I do not understand why are u using 595 for rows.Any way it seems that it is the problem of scanning rows delay.Remember the proteus has frame and time step adjustment in its animation enviroment.Increase the delay between rows.When u simulate in proteus it might be display that all rows are ON but when in hardware it solves ur problem.If the problem remains,send me the code.
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