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  • Design and Simulate a Secure Access Control System
    13 1 Objectives Students will design and simulate a secure access control system using combinational logic circuits and sequential circuits This project challenges students to create a digital system capable of validating a 4-digit security code entered via a keypad and granting access upon successful authentication
  • Electronics Electrical Engineering Forum | All About Circuits
    Digital circuit and logic questions (ie Logic, Gates, I2C, USB, 555 Timer, etc )
  • Implement f = A + BC + BD using NAND only - All About Circuits
    The constraint isn't 2-input NAND gates, just NAND gates, as evidenced by the TS's solution attempt, which included a 3-input gate His solution was almost correct, but he had an additional NAND gate inverter on the A line Removing that leaves you with a valid four NAND gate solution involving three 2-input and one 3-input gates
  • Need help with School Project [4-Digit Door Lock System]
    We were asked to design and simulate a digital lock system using logic gates and switches This project will simulate a basic 4-digit PIN lock system that requires the correct sequence of switch positions to unlock a "door" We have to provide a project report that includes the system's logic
  • 2:1 MUX in LTSpice using CMOS Transmission Gates, implementation
    Hello I am trying to create, for a project, a 2:1 Multiplexer using CMOS Transmission gates This MUX requires 2 transmission gates, so 4 total transistors I have seen some implementations use an inverter when connecting the Select bus I am pretty bad at electronics Take a look at my
  • Palindrome detection circuit -Need help designing - All About Circuits
    Sorry I did not make my question clear enough I would like to check for a palindrome in base 2 using logic gates I would prefer not to use xor gates in the circuit Example of what I would like to do: Input: 1101 Output: 0 (not a palindrome) Input: 1001 Output: 1 (palindrome) Input: 1111 Ouptut: 1 (palindrome) Input: 1010 Output: 0 (not a palindrome)
  • Vending machine project - All About Circuits
    Produce the truth table and design a logic system, for a common element to all drinks i e the hot water valve, (use all the inputs and only NAND gates in the final diagram) Record the sequence of developing your solution Expand the system to show separate indicators for tea, coffee, milk and sugar
  • 3 way latching switch (Or ternary flip-flap-flop)
    However, I find pushbuttons and latching circuits far more classy and fun, so why not!! I thought it would only be a super simple "logic-gates puzzle" to go from a 2 way latch to a 3 way, but it seems a little more complex than that However, the 4532 4514 (crutschow's circuit) or the 4044 (Nykolas') will do the job juuust fiiine
  • Sequential Manual Switches with Logic Gates - All About Circuits
    Here's the sim of a logic circuit, that I think does what you want: It uses one dual D flip-flop IC and one quad, 2-input NAND gate IC to generate that interesting sequential logic I tried several variations of the circuit before getting one that met all the criteria The inputs are the switch outputs SW1 (red trace) and SW2 (yellow trace)





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