Jump to content
Electronics-Lab.com Community

Newbie needs advice on making continuity LED box.


Recommended Posts

I currently have a LED box that I used to test continuity on a 28 pin circular connector. See attached photo. Pin 1 when probed (probe is attached to box) on the circular connector corresponds to LED 1, etc.

I would like to make a digital display version of this.

Any help appreciated on components needed, circuit examples, etc.

LED28box.jpg

Link to comment
Share on other sites


You could use an Arduino Mega 2560 as it has enough digital input/output pins for your 28 connections. Other micro-controllers may work but I only know the Arduino controllers.

Do you need more than a simple one line display?  "Yup pin 13 is okay"

Link to comment
Share on other sites

If it interest you, I could program the micro-controller for you.  That would give you an introduction to micro-controllers. The micro-controller is about 21$, a LCD  about 13$, You would need a 9 volt battery, a battery connector, a battery to micro_controller connector, and a switch also.

An assortment of colored wire would be helpful. Plus a plastic or metal box to pack it all into.

If you are checking your cables near a computer you could uses the computer as a simple display device instead of the LCD.

LCD : https://www.amazon.com/SunFounder-Serial-Module-Arduino-Mega2560/dp/B01GPUMP9C/ref=sr_1_1_sspa?adgrpid=1335907194272933

Micro-controller: https://www.amazon.com/ELEGOO-ATmega2560-ATMEGA16U2-Arduino-Compliant/dp/B01H4ZDYCE/ref=sr_1_2_sspa?crid=1L06F0IP302BX&keywords=Arduino+R3+Mega2560&qid=1684882151

wire: https://www.amazon.com/TUOFENG-Hookup-Wires-6-Different-Colored/dp/B07TX6BX47/ref=sr_1_3?keywords=colored+wire+spool&link_code=qs&qid=1684885902&sourceid=Mozilla-search&sr=8-3

 

Link to comment
Share on other sites

The Mega 2560 has 54 digital I/O pins plus 16 analog pins for a total of 70. You lose  2 pins for the display for either  the PC  display or LCD. You can have speech on the PC for free.

You may need a larger LCD for numerous pins. Mapping the Mega pin numbers to the cable pin numbers would have to be predetermined.  Some connectors use alpha characters (A - Z) I gather.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
  • Create New...