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  1. shahdsaad

    Issue with 2-Digit BCD Adder-Subtractor Circuit Using 74LS83

    This is my design for a 2-digit adder-subtractor BCD circuit. The design performs well with addition, but for subtraction, it calculates 33 - 73 = 60, which is incorrect. Can anyone help me figure out the issue? I’ve used a 74LS83 IC along with a bunch of XOR gates, AND gates, NOT gates, and a...
  2. cneumann

    Led Timer Integration/120v AND Gate Circuit

    Hey all! I recently installed led back lighting on our TV setup. Unfortunately, the USB outlets on the tv are always powered. I have one of these energy conserve power strips (https://a.co/d/aLvpjJb) which detects when the TV is pulling more then "idle" current and then flips a relay which...
  3. S

    Hardware Interlock Circuit with AND & NOT Gates

    Here is my Hardware Interlock Circuit for Gate Signals which prevents both PWM Signals to be at same state at any given time. Here I want to reduce this two AND Gate IC's into a Single AND Gate IC. Or Is there any other way to implement the Hardware Interlock for Gate Signals ? Is there any...
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