This project was inspired by the legendary electronics hobbyist author Forrest M Mims. There is an example circuit of XOR hardware encryption using a few CMOS logic chips (4000 series) in the digital electronics book in his famous Radioshack Electronics learning lab kit. As most hardware hackers, I was on standby waiting for my team to finish the software side of things, and worked on a personal project, that I did not intended to spend time to actually submit as a project.

As I was flipping through the PDF version of the digital electronics book, this project caught my eye, and I didn't have most of the CMOS parts to do the project, but replaced them with TTL equivalents. Then, I came to the realization that for the signals, I did not need to use the circuit in the book! I could use my Electronics Explorer board and an Arduino. I also realized that for the transmission part of the circuit (Data transmitting to the other gate), I could try to simulate a fiber optic link using a infrared LED and photo transistor. After hours of tinkering non stop I got it to work with fantastic results, and hopefully I can have the Arduino Display ready for display, to show a message of when the data line is secure or compromised.

Built With

  • arduino
  • fpga
  • analog
  • texas-instruments
  • cmos
  • xilinx
  • digilent-electronics-explorer-board
  • ttl
  • forrest-m-mims-digital-electronics-book
Share this project: