Hello guys! I recently found these 7 seg displays in my garage. Does any one know their official model / product number by any chance? Can anyone tell me anything about them apart from them being 7 segment displays. Also the back of these displays have 11 pins as shown in the pitures. Do you know why do they have 11 pins?


Thank You

 

7 for led.
1 power.
1 ground.
That's 9. Just need to figure out 2 more.

 

There are 7-segments, two colons and either a common anode or a common cathode. It is completely possible that me pin is NC (no connection).

Set up a 3-volt battery pack (2-AA for example) and a 100 ohm resistor and a pair of wires.

 

It is common to have two pins for power, 7 for segments, 2 for decimal points. That gives a total of 11 pins.

You can identify the pins using the diode function of a DMM.
The first thing is to figure out if it is COMMON ANODE or COMMON CATHODE.
After that you should be able to identify the function of the remaining pins.

7-segment LED pinouts are fairly standard.

Have a go with Connection A for starters:

 

7 segments
2 for colon
1 for am/pm
1 common