Hello Everyone,

I was not able to find the the data sheet for the LED Display C8021-11. Does anyone know of where I may be able to find the data sheet for it.I am working on a LED Counter, Multiplexing home project. Thank you in advance

 

You bought them from Jameco, right?

Have a look at this:
http://sci.tech-archive.net/Archive/sci.electronics.misc/2007-04/msg00038.html

Looks like they need quite a bit of current to even start showing indication of life. I think I'd use a different display.

 

You bought them from Jameco, right?

Have a look at this:
http://sci.tech-archive.net/Archive/sci.electronics.misc/2007-04/msg00038.html

Looks like they need quite a bit of current to even start showing indication of life. I think I'd use a different display.

Thank you for the information you provided. Please provide any information that would lead me to locate the data sheet for such item. Thank you

 

On this page:
http://www.linux-cae.net/PCB/gvsu.edu.steriana.html
there is a link to these zipped Eagle parts libraries:
http://claymore.engineer.gvsu.edu/~steriana/courses/Downloads/adslbr.zip

and on the page the professor claims that there is a layout for REFAC C8021-11 7-segment LED displays; I didn't find a C8021-11 but I did find an LN514RK, which apparently has the same pinout.

A datasheet for the LN514RK can be found here:
http://www.datasheetcatalog.com/datasheets_pdf/L/N/5/1/LN514RK.shtml

According to the Eagle layout, pins are as follows (14 pin package, missing pins 4 and 12)
1 - a
2 - b
3 - c
4 - (missing)
5 - d
6 - e
7 - f
8 - g
9 - h
10 - not documented
11 - not documented
12 - (missing)
13 - not documented
14 - common cathode

So, one of pins 10, 11, or 13 must be a decimal point, and I suspect that there is another common cathode connection somewhere.

However, this doesn't agree with the datasheet. The only two pins they agree on is that pin 1 is segment a, and pin 14 is the common cathode. You'll have to figure the rest out for yourself.

 

Thank you very much for the time taken to provide the given information. I did try to figured out the pin connections but there were some pins that I was not able to determine what their functionality is for. I used my power supply and the appropriate current limiting resistors to light the LED s but the out come was not a success. Thank you