Adafruit 5379 Turing Complete Labs 10 Digit Monochrome LCD Display - STEMMA QT / Qwiic

The Adafruit 5379 is a professional-grade 10-digit monochrome LCD display module featuring integrated STEMMA QT and Qwiic connectors for plug-and-play I2C connectivity with microcontroller platforms. This display is engineered for embedded systems engineers, IoT developers, and hobbyists who require a compact, low-power numerical display solution with standardized quick-connect interfaces. It solves the integration challenge of adding precise digit readouts to projects without complex wiring or custom PCB modifications.

Product Overview

The Adafruit 5379 combines a high-contrast monochrome LCD segment display with integrated I2C control circuitry, eliminating the need for parallel data lines or complex multiplexing logic. The display operates on a single I2C bus, allowing seamless communication with Arduino, Raspberry Pi, and other microcontroller platforms through the standardized STEMMA QT connector (3.3V logic) and compatible Qwiic interface. The monochrome LCD technology ensures excellent visibility across wide viewing angles while maintaining minimal power consumption, making it ideal for battery-powered applications and long-duration monitoring systems.

This 10-digit display module features individual segment control for each digit position, enabling the display of numbers, decimal points, and custom characters. The integrated driver handles all LCD timing and bias voltage generation, simplifying firmware development. The module operates at 3.3V logic levels with typical current draw under 5mA during normal operation, making it suitable for low-power IoT nodes and portable instrumentation. The compact form factor and standardized connector ecosystem make it an excellent choice for rapid prototyping and production deployment in measurement, monitoring, and display applications.

Key Specifications

Specification	Details
Product Type	10-Digit Monochrome LCD Display Module with I2C Interface
Brand	Adafruit Industries
Model Number	5379
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Display Type	Monochrome LCD, 10 digits
Communication Interface	I2C (400 kHz standard, 1 MHz fast mode supported)
Connector Type	STEMMA QT / Qwiic (4-pin JST SH 1.0mm)
Operating Voltage	3.3V logic level, 5V tolerant inputs
Typical Current Draw	Under 5mA at 3.3V
Viewing Angle	Wide angle, up to 170 degrees

Key Features

• 10-digit monochrome LCD display with individual segment control for maximum flexibility in character representation and custom symbol display
• Integrated I2C driver with selectable I2C address, supporting multiple displays on a single bus for expanded display configurations
• STEMMA QT and Qwiic connectors for tool-free, polarized connections that eliminate soldering and reduce integration time
• Ultra-low power consumption under 5mA, ideal for battery-powered IoT devices, remote sensors, and portable measurement instruments
• Wide operating temperature range and excellent contrast ratio for reliable operation in diverse environmental conditions
• Open-source Arduino and CircuitPython libraries with complete example code for rapid development and deployment

Applications and Use Cases

• Digital multimeters and test equipment displaying voltage, current, and resistance measurements with 10-digit precision across industrial and laboratory environments
• Environmental monitoring systems showing temperature, humidity, and air quality indices with real-time data logging and remote IoT integration
• Portable power banks and battery management systems displaying charge percentage, voltage output, and remaining capacity for consumer electronics
• Scientific instruments and data acquisition systems requiring precise numerical readouts for frequency counters, timers, and sensor calibration displays
• Home automation and smart building systems displaying energy consumption, water usage, and utility metrics for real-time monitoring dashboards
• Educational robotics and maker projects teaching embedded systems, I2C protocol implementation, and sensor integration with visual feedback

How to Use

Integration of the Adafruit 5379 is straightforward: connect the STEMMA QT connector to your microcontroller's I2C port (SDA and SCL pins) using a compatible cable, or solder directly to the JST SH connector pads if using a custom PCB. Install the Adafruit_LEDBackpack library via Arduino IDE or use the CircuitPython equivalent for MicroPython boards. Initialize the display object with the correct I2C address (default 0x70, configurable via solder bridges) and call the begin() function. The library provides high-level functions for writing digits, controlling decimal points, and managing brightness settings without requiring direct register manipulation.

For typical applications, use the writeDigitNum() function to display numbers at specific digit positions, or leverage the print() function for formatted output. The display updates are buffered, so call writeDisplay() to push changes to the hardware. Configure I2C bus speed to 400 kHz for standard operation or 1 MHz for faster refresh rates in time-critical applications. For multiple displays on one bus, set unique I2C addresses using the onboard solder bridges and instantiate separate display objects. Power the module from your microcontroller's 3.3V supply or a dedicated 3.3V regulator, ensuring adequate current capacity for the I2C pull-up resistors and display circuitry.

Frequently Asked Questions

What is the I2C address of the Adafruit 5379 and can it be changed?

The default I2C address is 0x70 (0x71 alternative). The address can be customized using onboard solder bridges labeled A0, A1, and A2, allowing up to 8 unique addresses on a single I2C bus for daisy-chaining multiple displays. Refer to the datasheet for the address configuration table and solder bridge locations.

Is the Adafruit 5379 compatible with 5V microcontrollers?

Yes, the I2C input pins are 5V tolerant, allowing direct connection to Arduino Uno, Arduino Mega, and other 5V logic microcontrollers. However, the display logic operates at 3.3V, so you must supply 3.3V power to the module. Use a 3.3V voltage regulator if your microcontroller only provides 5V output.

What is the maximum I2C bus speed supported by this display?

The Adafruit 5379 supports standard I2C mode (100 kHz), fast mode (400 kHz), and fast-mode plus (1 MHz). The Arduino Wire library defaults to 100 kHz, but you can increase speed using Wire.setClock(400000) for 400 kHz operation. Higher speeds reduce display update latency in real-time applications.

Can I display decimal points and custom characters on this display?

Yes, each digit position includes a dedicated decimal point segment controlled independently. The library provides writeDigitRaw() function for direct segment control, allowing custom character creation beyond standard numerals. You can also control the colon segment if present for time display applications.

What is the power consumption of the Adafruit 5379?

Typical operating current is under 5mA at 3.3V, making it suitable for battery-powered applications. Actual consumption depends on the number of active LCD segments and I2C communication frequency. The display has no backlight, so power consumption remains constant regardless of brightness perception.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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