Classic LED 7-Segment Displays using PIC16F887




Just recently I have been addicted to old LED displays as they are small and bright and I love the classic look. We can see them in vintage calculators and vintage led watches. However these displays consume significant amount of power, so they are not used in watches and calculators anymore. As they are replaced by LCD, these LED 7-Segment displays are not in production anymore and difficult to obtain.

7 Segment Displays

Now, I have 2 models of the classic LED 7-Segment as shown in the picture below: HP 5082-7414 from HP is on the left. It’s a 4-digit Red LED 7-Segment very nice for wristwatch. The one on the right is an 2-digit Red LED 7-Segment from an unknown maker. It can be used in a wristwatch too (with a little bit bigger case).

Based on my inspection, I have made symbols for these displays with Eagle 5.4.0 free version. The displays are common cathode and the symbols are below

The PCB footprints are as the following (DIP 12)

I have made simple clocks using these displays and PIC16F887. The real thing looks much better than the photo. The displays are bright red and sun light viewable. Very COOL!!! They are on my computer desk and I love to see them very often.

 

For more detail: Classic LED 7-Segment Displays using PIC16F887




Current Project / Post can also be found using:

  • 7 segment code using pic16f887
  • digital clock using pic and 7 segment display pic16f887
  • display 7 segment characters using pic 16f887
  • led interfacing with pic16f887

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