i need help seriously

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nzewi007

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hello engr
i am embacking on a project and i need assistance,i want to built a 7x 64 dot matrix moving message display and i will be gratefull if any body can help me with the circuit and building procedure.
 
7x 64 moving display help?

You need serious help with what? Couldn't you just ask in the title?
 
You didn't say what you needed help with in your title, so all I can say is Google will help you.
 
help on the circuit diagram of moving message sign(7x64 dot matrix)

good day
i nam embacking on a project and i need help on the circuit diagram of moving message sign(7x64 dot matrix).
 
help on the circuit diagram of moving message sign(7x64 dot matrix)

good day
thanks for your reply.
i am embacking on a project and i need help on the circuit diagram of moving message sign(7x64 dot matrix).
 
No one is going to do your homework for you. Put some effort into doing it yourself, then come back with a more specific title and question, and you MIGHT get help.

"I need help seriously" is not a title.
 
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http://www.sedgwick-phelan.co.uk/images/moving-sign.jpg

The engrs. are on board to assist you with your moving message sign!


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Is this something that suits your needs?

Running Message Display:
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Here is a running message display circuit wherein the letters formed by LED arrangement light up progressively. Once all the letters of the message have been lit up, the circuit gets reset. The circuit is built around Johnson decade counter CD4017BC (IC2). One of the IC CD4017BE’s features is its provision of ten fully decoded outputs, making the IC ideal for use in a whole range of sequencing operations. In the circuit only one of the outputs remains high and the other outputs switch to high state successively on the arrival of each clock pulse. The timer NE555 (IC1) is wired as a 1Hz astable multivibrator which clocks the IC2 for sequencing operations. On reset, output pin 3 goes high and drives transistor T7 to ‘on’ state. The output of transistor T7 is connected to letter ‘W’ of the LED word array (all LEDs of letter array are connected in parallel) and thus letter ‘W’ is illuminated. On arrival of first clock pulse, pin 3 goes low and pin 2 goes high. Transistor T6 conducts and letter ‘E’ lights up. The preceding letter ‘W’ also remains lighted because of forward biasing of transistor T7 via diode D21. In a similar fashion, on the arrival of each successive pulse, the other letters of the display are also illuminated and finally the complete word becomes visible. On the following clock pulse, pin 6 goes to logic 1 and resets the circuit, and the sequence repeats itself. The frequency of sequencing operations is controlled with the help of potmeter VR1. The display can be fixed on a veroboard of suitable size and connected to ground of a common supply (of 6V to 9V) while the anodes of LEDs are to be connected to emitters of transistors T1 through T7 as shown in the circuit. The above circuit is very versatile and can be wired with a large number of LEDs to make an LED fashion jewellery of any design. With two circuits connected in a similar fashion, multiplexing of LEDs can be done to give a moving display effect.
 
OK, OK, my hands are reaching thru my monitor so you both can slap them and then I'll go stand in a corner for awhile.

Looking at that diagram, I kind of like it and would try it out if I had the components and time to waste making it. Then again, I already have a professionally built scrolling LED sign complete w/ keyboard.
 
What the heck is wrong with you, HiTech?!?!?!?! Copy the schematics down, and then give them to me! I think it would be interesting to build a dot-matrix display. How many LED's are in it?
 
actually, I like it. It fits the actual request exactly and is, most surely, not what the guy wanted. laffin...
 
I want to build a projector out of a laser pointer and a small magnetically controlled mirror.
 
OK, then what's holding you up from doing so? Get started. Or are we supposed to stand around waiting for the glue to dry on the motor and the mirror?
 
StopGo said:
I want to build a projector out of a laser pointer and a small magnetically controlled mirror.

You will need 2 mirrors (horizontal and vertical). I have done it way back playing with putting an ad on a building at night. I used voice coil speakers for the motors. Good luck.
 
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