Content for 74HC21

74HC21

The 74HC21 is a dual 4-input AND gate. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VC

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Project  NeoPixel Punk Console

NeoPixel Punk Console

“Blinking RGB LEDs with 555s and a handful of 74-series logic The goal of this project is to display colorful patterns on a strip of WS2812 or SK6812 RGB LEDs (aka NeoPixels) without the help of an MCU. Addressable RGB …

Project  Battledip

Battledip

“This project is a good introduction to digital logic circuits as it will utilize basic concepts of Boolean logic and memory in circuits. You will be using chips such as a Dual D-Type Flip Flop, Quad 2-input XNOR gate, and …