12 Segment Bar Graph - Weird pinout ! - Electronic Circuits Projects Diagrams Free

Sync · 9th July 2008, 05:50 AM

I have this nice looking 12 segment bar graph arrays but i just don't understand the pinout of some of the leds !
See attachment diagram gif, the leds are B, C, E, F, G, H, J and K.
Is there a way to use it ?

ericgibbs · 9th July 2008, 06:21 AM

Quote:

Originally Posted by Sync

I have this nice looking 12 segment bar graph arrays but i just don't understand the pinout of some of the leds !
See attachment diagram gif, the leds are B, C, E, F, G, H, J and K.
Is there a way to use it ?

hi,
These bars can be driven without any problem, the important point is,what device do you want to drive them with, whats the project.

Sync · 9th July 2008, 08:24 AM

I use multiple leds in my project already, like 10 or 12 in rows. I can drive the leds with no problem with my hardware. I just want to know why the leds in this 12 segment bar graph are not like the other bar graph available, each led has a pair of pin individually, but not this model.

ericgibbs · 9th July 2008, 09:35 AM

Quote:

Originally Posted by Sync

I use multiple leds in my project already, like 10 or 12 in rows. I can drive the leds with no problem with my hardware. I just want to know why the leds in this 12 segment bar graph are not like the other bar graph available, each led has a pair of pin individually, but not this model.

hi,
I suspect its to limit the number pins on the LED, else it would require 24 pins.
Do you have a model number.?

I could check to see how others are using them.

Sync · 9th July 2008, 10:17 AM

Hey Thanks!
Can't find anything else than this pdf
::: Welcome to Kingbright web :::

kchriste · 10th July 2008, 02:49 AM

The way you drive it depends on what kind of output you expect. "Bar Mode" would be different than "Dot mode". Which chip do you want to drive it with? I'll admit it IS a silly way of saving pins. They could just have made it common Anode or common Cathode or formed a matrix to reduce pin count.

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9th July 2008, 08:24 AM	(permalink (permalink))
Sync	I use multiple leds in my project already, like 10 or 12 in rows. I can drive the leds with no problem with my hardware. I just want to know why the leds in this 12 segment bar graph are not like the other bar graph available, each led has a pair of pin individually, but not this model. Last edited by Sync; 9th July 2008 at 08:25 AM.

9th July 2008, 10:17 AM	(permalink (permalink))
Sync	Hey Thanks! Can't find anything else than this pdf ::: Welcome to Kingbright web :::

10th July 2008, 02:49 AM	(permalink (permalink))
kchriste	The way you drive it depends on what kind of output you expect. "Bar Mode" would be different than "Dot mode". Which chip do you want to drive it with? I'll admit it IS a silly way of saving pins. They could just have made it common Anode or common Cathode or formed a matrix to reduce pin count. __________________ --- The days of the digital watch are numbered. ---