How to Choose a Display Module for Arduino Projects
By Official Hobby Components Online Store | Buy Electronic Kits, Components, Boards, Shields, Modules | Published: 2026-10-18
Category: How-to Guides
Learn how to pick the right Arduino display: OLED, TFT, or character LCD. Compare interfaces, size, and features to match your project needs.
Quick Answer
For simple text and low power, choose a character LCD or a small OLED; for graphics and touch, go with a TFT module. Match the interface (I2C, SPI, parallel) to your microcontroller's available pins and your coding comfort.
Interface Matters More Than You Think
The way a display talks to your Arduino affects wiring, speed, and pin usage. Parallel interfaces (like the 16x2 LCD) use many pins but are straightforward for text. SPI is fast and common on TFT and OLED modules, while I2C uses only two pins but is slower. Your choice depends on how many pins you can spare and how often the screen updates.
Resolution vs. Physical Size
A larger screen doesn't always mean more pixels. The 1.3" OLED has the same 128x64 resolution as a 0.96" version, just bigger pixels. If you need fine detail, check the pixel count, not just the diagonal size. For graphics, a TFT with higher resolution gives sharper images but may require more memory.
Decision Rules for Choosing Your Display
- Need to show simple text only?: Choose a character LCD like the 16x2 or 2004 SmartLCD. If you want minimal wiring and no libraries, the SmartLCD is easier; if you're on a tight budget, the parallel 16x2 is cheaper. For a quick text-only project, the SmartLCD saves time.
- Want graphics or a compact display?: Go with an OLED module like the 1.3" SH1106. It offers sharp graphics in a small size and low power, but the resolution is limited to 128x64. Check the pixel count, not just the screen size.
- Need color or touch input?: Pick a TFT module like the 2.4" with resistive touch. It provides color graphics and touch, but requires more pins and memory, and the resistive touch needs calibration. Ensure your microcontroller has enough free pins and memory.
Display Modules at a Glance
- 1.3" SH1106 uOLED Display Module (Blue): This 1.3" OLED uses the SH1106 driver and defaults to SPI, but can be reconfigured to I2C with soldering. If you need to save pins, you can switch to I2C, but plan for a small soldering task.
1.3" SH1106 uOLED Display Module (Blue) - 2.4 inch Colour TFT Module with Resistive Touch: This 2.4" TFT has a 65K color display and includes a resistive touch sensor, using SPI. It gives you color graphics and touch input, ideal for interactive interfaces, but requires more pins and memory than a character LCD.
2.4 inch Colour TFT Module with Resistive Touch - 16 x 2 Character Transmissive Parallel LCD Module (blue backlight): This 16x2 character LCD uses a parallel interface (4-bit or 8-bit) with a blue backlight. It's simple for text output and very low cost, but uses many I/O pins and can't show graphics.
- Hobby Components 2004 SmartLCD: The 2004 SmartLCD is serially controlled and includes a microcontroller, so no libraries are needed. It saves development time and pin usage, perfect for quick text display without complex wiring.
Who Should Choose Which Display?
Best for
- Beginners who want a simple text display without complex wiring – the SmartLCD is ideal.
- Projects needing low power and compact size with basic graphics – the 1.3" OLED fits well.
Not for
- Projects that require high-resolution color graphics or touch – choose a larger TFT instead.
