Adafruit
Standard LCD 20x4 + extras [white on blue]
Standard HD44780 LCDs are useful for creating standalone projects. 20 characters wide, 4 rows White text on blue background Connection port is 0.1" pitch, si...
Standard HD44780 LCDs are useful for creating standalone projects.
- 20 characters wide, 4 rows
- White text on blue background
- Connection port is 0.1" pitch, single row for easy breadboarding and wiring
- Single LED backlight with a resistor included, you can power it directly from 5V. If it's too bright for you, it can be dimmed easily with a resistor or PWM and uses much less power than LCD with EL (electroluminescent) backlights
- Can be fully controlled with only 6 digital lines!
- Built in character set supports English/Japanese text, see the HD44780 datasheet for the full character set
- Up to 8 extra characters can be created for custom glyphs or 'foreign' language support (like special accents)
- Comes with necessary contrast potentiometer and strip of header
We have a datasheet that has dimensions and pin-locations and then a HD44780 datasheet with the detailed commands for control
We have a generic 20x4 datasheet that has dimensions and pin-locations (the exact model may vary but the pinout, size and protocol information is the same). We also have a HD44780 datasheet with the detailed commands for control
Jargon buster
Plain-language definitions for the technical terms used above.
- LCD
- LCD stands for liquid crystal display, a screen technology that uses a backlight and liquid crystals to show images or text. It matters because LCD modules usually need a display driver and enough controller pins or a bus interface to send image data.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
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