Description M5Stack Red 7-Segment Digit Clock Unit M5-U146 is a compact 2.1-inch 4-digit 7-segment display module for clock display, decimal number display, stopwatch projects, and embedded data readout. The M5-U146 module uses a red LED 7-segment display with decimal points on each digit and center colon dots, making it especially useful for time, counter, score, status, and numeric information interfaces. The M5Stack Red 7-Segment Digit Clock Unit is driven by a TM1637 display driver IC and includes an STM32F030 microcontroller for I2C communication. The default I2C address is 0x30, and the M5-U146 Digi-Clock unit supports adjustable I2C addressing through a 4-bit DIP switch, so multiple modules can be used in the same system when separate display channels are required. For visibility control, the M5Stack Red 7-Segment Digit Clock Unit M5-U146 supports 8 brightness levels, helping the red LED display stay readable in different lighting conditions while keeping power usage low. Four fixing holes make the M5-U146 display module easy to mount into panels, desktop devices, prototypes, timers, controllers, and other M5Stack or custom embedded products. Features M5Stack Red 7-Segment Digit Clock Unit with exact SKU M5-U146 2.1-inch 4-digit 7-segment display module Red LED digital display for clock, counter, and numeric data Decimal point on each digit plus center colon dots for clock display TM1637 display driver IC STM32F030 microcontroller for I2C communication Default I2C address 0x30 Adjustable I2C address with 4-bit DIP switch 8 brightness levels for different environments Low power consumption design Four fixing holes for panel, enclosure, and prototype mounting Specifications Parameter Value Brand M5Stack Product Name M5Stack Red 7-Segment Digit Clock Unit SKU M5-U146 Display Type 2.1-inch 4-digit red 7-segment display Driver IC TM1637 MCU STM32F030 Communication I2C Default I2C Address 0x30 Address Setting 4-bit DIP switch adjustable I2C address Brightness 8 levels Power Supply 5V DC Product Size 50 x 31 x 14mm Package Size 136 x 92 x 15mm Net Weight 12.5g Gross Weight 17.8g Applications Digital clock display and timer projects Stopwatch and countdown display interfaces Sensor value, status, and numeric data display Embedded controller front panels M5Stack prototyping, teaching, and DIY electronics Multi-display systems using adjustable I2C addressing Product List M5Stack Red 7-Segment Digit Clock Unit M5-U146 x1 HY2.0-4P cable 20cm x1 Other Content M5-U146 is intended for numeric display and clock-style information output rather than full graphic display. The TM1637 driver and STM32F030 MCU make the M5Stack Red 7-Segment Digit Clock Unit simple to control over I2C. Use the 4-bit DIP switch to adjust the I2C address when multiple M5-U146 display modules are connected. The red LED 7-segment display is well suited for fast-glance data where readability is more important than graphics. Resources Use official M5Stack Digi-Clock documentation and module markings for wiring and address configuration. Review host-controller I2C settings before connecting multiple M5-U146 display modules. FAQ Q1: What is M5-U146 used for? A1: M5-U146 is used for clock display, stopwatch display, counters, and numeric data output using a red 7-segment display. Q2: What driver IC does this display use? A2: The M5Stack Red 7-Segment Digit Clock Unit uses a TM1637 display driver IC. Q3: Does M5-U146 support I2C? A3: Yes. M5-U146 communicates by I2C and uses default address 0x30. Q4: Can multiple modules be used together? A4: Yes. The 4-bit DIP switch lets you adjust the I2C address for multi-module systems.
