Sunday, May 8, 2022

Seven segment smart counter PCB and 3D printed box

I've introduced you my seven segment RESTful counter here:
It's based on the ESP8266, and it may drive one or more 8 digits seven segment MAX7219 displays.

In this post here I would like to share with you a double line 8 digits seven segment PCB board. Ready to be printed and builded.

Also, I attache here the CAD files that you can use to print you own box for this counter.

The board was built using Eagle.
The seven segments module that i use are the HS420361K-32, which is a common cathode module with the following wiring.

  pin 01: E
  pin 02: D
  pin 03: dp
  pin 04: C
  pin 05: G
  pin 06: dig4
  pin 07: B
  pin 08: dig3
  pin 09: dig2
  pin 10: F
  pin 11: A
  pin 12 dig1

Please find the connection diagram below. Of course the wiring of 4 bit seven segment modules changes by the model you use, so pay attention to your wiring scheme.

The box was designed using Autodesk Fusion 360 and printed using a Creality3D Ender-3 Pro on PLA.

  • read risk disclaimer
  • excuse my bad english