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7-segment LED display interfacing with microcontroller

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Author
Kanaka Phadnis
Posted
17-Jul-2006 10:18 GMT
Toolset
C51
New! 7-segment LED display interfacing with microcontroller
Hi all,

I am new to this controller,I want to interface the 7 segment LED(common anode) with P89LPC932,i have to display 0 to 999 on display.I am using 3 seven segment LED displays.Are their any sample programe for this?

Thanks n regards
kanaka
Read-Only
Author
Reinhard Keil
Posted
18-Jul-2006 11:47 GMT
Toolset
None
New! RE: 7-segment LED display interfacing with microcontroller
This page might help:
http://www.c51.de/c51.de/Dateien/software.php?UIN=
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Author
erik malund
Posted
18-Jul-2006 14:01 GMT
Toolset
None
New! RE: 7-segment LED display interfacing with microcontroller
To Reinhard:
1) are you sure Kanaka understands German
2) I found no LED 'example'

To Kanaka:
Everybody and his brother is going to come out of the woodwork with multiplexed solutions. If your LEDs are less than 20mA per segment a string of 3 shift registers provide a simpler and cheaper solution.

Erik
Read-Only
Author
Reinhard Keil
Posted
18-Jul-2006 14:14 GMT
Toolset
None
New! RE: 7-segment LED display interfacing with microcontroller
There is an example with the title:
"SAA1064 4-digit LED-driver with I²C-bus interface"

Well, he may not understand German, but still the program might help him to think about his own problem.
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Author
Ms. Kanaka Phadnis
Posted
20-Jul-2006 11:04 GMT
Toolset
None
New! RE: 7-segment LED display interfacing with microcontroller
Hi,

I am Miss bye the way. I do not understand
German. But "Danke (dahn'-kuh);" for your concern..
I am already using a microcontroller for a different purpose and along with that i want to use 7segment LED Display - 3nos, so the document doesnt help me..

Thanks and regards,

Ms. Kanaka
Read-Only
Author
erik malund
Posted
20-Jul-2006 13:25 GMT
Toolset
None
New! RE: 7-segment LED display interfacing with microcontroller
I want to interface the 7 segment LED(common anode) with P89LPC932

You are using a uC with hardware IIC. Philips have LED drivers that run off the IIC bus.

Erik
Read-Only
Author
Andy Neil
Posted
20-Jul-2006 16:08 GMT
Toolset
None
New! IIC (aka I2C) LED drivers
"Philips have LED drivers that run off the IIC bus."

http://www.philips.com/i2c


And also several other manufacturers; eg,

http://www.maxim-ic.com/Display.cfm
Read-Only
Author
Neil Kurzman
Posted
21-Jul-2006 06:47 GMT
Toolset
None
New! RE: 7-segment LED display interfacing with microcontroller
How is the question. By transistors? Logic chips? a display driver?

Once you choose the method, the code will follow.
Read-Only
Author
erik malund
Posted
21-Jul-2006 13:30 GMT
Toolset
None
New! RE: 7-segment LED display interfacing with microcontroller
I must add one more decision to be made
How is the question. By transistors? Logic chips? a display driver?, multiplexed or not

Once you choose the method, the code will follow.


one added bit: if your LED segements use less than, say, 20 mA, the multiplexing typically is the wrong choice (more complicated, more expensive).

Erik

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