1. Arduino Keypad And Lcd

Hi,In this tutorial we’re going to create a DIY 3×4 Keypad. This keypad is perfect to use in your Arduino projects and a great project to practice etching.

I am having trouble designing a 4 by 4 key pad circuit with an 8 bit output. I am using a straight ring counter as the shift register and either a 74LS273 or 74C922 latch for the outputs. I am having trouble connecting my logic gates (andor) to the columns for the key press detect. Any help would be grateful even just a point in the right.

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Parts Required. x12 Pushbuttons –. x3 4700 Ohm Resistors –. Pin Headers –. PCB –. Jumper Wires Female /Male –Parts Required Schematics.

Arduino Keypad And Lcd

a PDF with the Schematics that you need print in order to etch your own PCB. the KiCad files for these schematics to design your own Keypad.How to etch a PCBIf you don’t know how to etch a PCB please watch the YouTube video below created by a YouTuber called JumperOneTV. He explains really well the whole process.Pictures of my Keypad Before Etching (Schematics + PCB) Etched PCB PCB back drilled PCB top drilled Final Product top Final Product backThis Keypad is great to use with the Arduino and I’ll post a project using this Keypad really soon.