Electronic Safe Project

Students will use concepts and skills they developed in previous labs to design and build an electronic safe with a 4-digit password. This lab will reinforce the practical application of combinational logic circuits and revisit how flip flops are used to create shift registers. Students can optionally complete advanced challenges like adding a solenoid to physically simulate opening a safe door.
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This is lab 16 of 17 in the course, Digital Electronics.


In this lab, students will:
  1. Build an electronic safe with a 4-digit password.
  2. Explore how flip-flops can be combined to make shift registers.
  3. Explore the practical applications of combinational logic circuits.
  4. Have the option to learn how to wire additional hardware to the Digital Electronics breadboard.


  • Introductory Physics
  • Circuits 1


Engineering laboratory solution for project-based learning that combines instrumentation and embedded design with a web-driven experience, delivering a greater understanding of engineering fundamentals and system design.

Digital Systems Development Board for NI ELVIS III

An application board for NI ELVIS III that provides students with a comprehensive education in digital electronics with hands-on experiments to interactively demonstrate concepts in the digital domain.


Multisim is a circuit simulation tool built for educators to teach analog, digital, and power electronics by connecting simulation to experimentation. 

Required Software

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  • Multisim 14.0.1 Education or Later - Download
  • NI LabVIEW FPGA Vivado 2014.4 - Download
  • Digilent Hardware Driver (note, the installer above automatically downloads the installer below onto your computer)
    • Navigate to C:\NIFPGA\programs\Vivado2014_4\data\xicom\cable_drivers\nt64\digilent
    • Install install_digilent.exe

Required Hardware

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