First Arduino Project - LCD Hacking by Mark Paget

Components:

Arduino Genuino Uno Legacy LCD (Liquid Crystal Display) 15 short leads 9v Battery (for testing pins) with red/black connector Bags of patience

Objective:

Produce numbers on 2 digit display (would have gone larger, but not enough pins on Arduino) Using Arduino Code to control digits

Observations:

Arduino code can be difficult and sometimes requires going the long way LCD was troublesome using 2 digits beside each other Not sure how to use more pins, etc on Arduino - maybe some form of chip to control pin voltages (multiplexor) Went with straightforward layout for simplicity - so Arduino pin to LCD pin, rather than using shielding, resistors or diodes.

Please see code here: https://raw.githubusercontent.com/marcuspaget/ArduinoLCD/master/40pin-LED-DEMO.ino

And short video/demo below

Thanks Mark