Content for 20x4 LCD

20x4 LCD

This is a basic 20 character by 4 line display. Utilizes the extremely common HD44780 parallel interface chipset (datasheet). Interface code is freely available. You will need ~11 general I/O pins to interface to this LCD screen. Includes LED backlight.

Arduino Wireless Weather Station Using NRF24L01, DHT11-DHT22

“Build a wireless weather station using two NRF24L01 modules that will Display both Indoor and Outdoor Temperature & Humidity. Step 1: What You Will Need: 2X Arduino UNO (or any other Arduino) LCD I2C Display 20X4 2x nrf24l01 module 2X DHT11 …

Recycle Plastic Into 3D Printer Filament at Home

“3D printing is very exciting technology as it reaches the home scale but using brand new filament was not acceptable to me as it would just increases the plastic waste amount on the planet. I started to look for a …

Bad Apple on 32K EEPROM

“This post covers how we interface a 32K EEPROM, a clock and an address register to a 20 x 4 LCD character display module and use it to play a video. We “decompress” the video by expanding our 8-bit data …

AIM65 lookalike computer from scratch

“AIM65 is a legendary single board computer from the 70s. I build on from scratch using Arduino standard components. The idea The Rockwell AIM 65 was one of the early 6502 based computers of the 70s. It had a 20 …

Arduino Race Timer, Lap Counter, and Controller

“Race controller for slot car or drone racing with dedicated racer gates. Cheap, portable, accurate, and easy to build. This is an Arduino based project that implements an inexpensive, reliable, race game controller that can be used for timed racing …

Mushroom Cultivation Automation: From Foraging To Fruiting

“Mushrooms are a unique and often mysterious organism. They’re not quite plants and not quite animals. As a fungus, mushrooms represent a distinct evolutionary lineage. Fungi grow as a single-cell yeast form (used in beer, wine, and bread making …

MIDI Pedal Board for guitar multieffect FX-500

“A pedal board to send MIDI Program Change to my old guitar multieffect that has a MIDI IN port. I have an old guitar multieffect Yamaha FX-500. To change the presets (90 in total), I must press up/down …

Elevator with Arduino

“You’ll learn how to create your own elevator with Arduino. Why Develop an Elevator with Arduino? In many places, elevators are used to allow users of a building to move between different floors. Elevators are devices that work with …

Digital Vacuum Regulator

“This is a Veneer Vacuum Press (Vacuum Pump) which has been modified with a Digital Vacuum Regulator to operate with a selectable vacuum pressure. This device is a replacement for the Vacuum Controller in my DIY Veneer Vacuum Press built …

Three-Phase RMS Ammeter with Current Transformers

“Display on an LCD following parameters for each phase: - the RMS current - the maximum reached - the maximum of sliding average. Purpose: True RMS current measurement on 3 phases with current transformers. The results are displayed on a 20x4 Character HD44780 …