0.4" 4-Digit 7-Segment Red LED Display Tube (12-Pin) | DIY & STEM
0.4" 4-Digit 7-Segment Red LED Display Tube (12-Pin) | DIY & STEM
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Short Product Description
Short Product Description
Bring your electronic projects to life with our ultra-bright 0.4" 4-Digit 7-Segment LED Display. Featuring a standard 12-pin footprint, this module is engineered for seamless breadboard integration and microcontroller compatibility (including Arduino and Raspberry Pi). Whether you are building a custom digital clock, a temperature monitor, or outfitting an engineering prototype, this display delivers crisp, high-contrast numerical readouts. Available online or at our Sham Shui Po retail store for immediate pickup.
Key Features
Key Features
- High-Contrast Red LEDs: Delivers ultra-bright, clearly visible numbers even in well-lit environments, ensuring your data is never misread.
- Compact 0.4" Digit Height: Striking the perfect balance between readability and space-saving design, making it ideal for compact enclosures.
- Standard 12-Pin DIP Format: Ensures effortless mounting on breadboards and custom PCBs without the need for complex surface-mount soldering.
- Multiplexed Architecture: Drastically reduces the number of required microcontroller I/O pins, freeing up your board for additional sensors and modules.
- Low Power Consumption: Optimized for energy efficiency, making it highly suitable for battery-operated DIY devices and IoT nodes.
Full Product Description
Full Product Description
Elevate Your DIY Electronics Projects
When building custom hardware, visual feedback is crucial. You need a display that is reliable, easy to program, and highly visible. Our 0.4-inch 4-Digit 7-Segment LED Display Tube solves the problem of complex data visualization by providing a straightforward, bright red numerical output. Designed for makers and engineers alike, it ensures your project's data—from sensor readings to timers—is communicated clearly and instantly.
Seamless Integration for Rapid Prototyping
Stop wrestling with overcomplicated screens that drain your processing power. This 7-segment display utilizes a multiplexed 12-pin design, meaning it requires significantly fewer I/O pins from your microcontroller compared to static displays. It drops perfectly into standard breadboards and perfboards, allowing you to move from schematic to working prototype in record time.
Built for Reliability
Crafted for continuous use, the robust casing and premium LEDs ensure a long operating life with consistent brightness across all four digits. Whether you are a student exploring STEM concepts, an electronics hobbyist, or an industrial technician replacing a faulty panel readout, this module provides the dependable performance required for precision applications.
Technical Specifications
Technical Specifications
- Model: 4-digit 7-segment LED display (4042BS-1), common anode type.
- Digit height: 0.4 inch (approx. 10 mm).
- Number of digits: 4 (suitable for displaying 0000–9999, simple time, counters, etc.).
- Emitting color: Red.
- Overall package size: 40 × 16 × 14 mm (L × W × H).
- Pin count: 12 pins (shared segment lines plus digit-select lines for multiplexing).
- Electrical interface: Direct drive from standard logic ICs via current-limiting resistors; usable with driver ICs or transistor arrays for higher current.
- Microcontroller compatibility: Works with Arduino, Raspberry Pi, ESP32 and other MCUs (requires multiplexing in code or a driver IC).
- Typical use cases: Numeric display for clocks, timers, counters, voltmeters, temperature readouts, etc.
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
Q. Do I need a driver IC to operate this display?
A. While you can drive it directly using the multiplexing technique via a microcontroller's GPIO pins (with appropriate current-limiting resistors), pairing it with a driver IC like the MAX7219 can simplify your code and save even more I/O pins.
Q. Is this a Common Anode or Common Cathode display?
A. Based on the standard 4042BS-1 part number, this is typically a Common Anode configuration. Please consult standard pinout diagrams for the 'BS' series when wiring your circuit.
Q. Can I use this for 3.3V logic boards like the Raspberry Pi?
A. Yes, the LEDs will illuminate at 3.3V, though they may be slightly dimmer than at 5V. Always ensure you calculate and use the correct series resistors to protect both the LEDs and your board's I/O pins.
Target Users / Applications
Target Users / Applications
- STEM Students & Educators: For learning basic multiplexing and digital logic.
- DIY Makers & Hobbyists: Building digital clocks, weather stations, or timers.
- Repair Technicians: Replacing legacy readouts in industrial or home appliances.
