ET-D04
TM1637 4-Digit Display
Large 0.56" 4-digit display on two GPIO pins
AED 9.00
Out of stockOverview
Large 0.56" 4-digit display on two GPIO pins
The ET-D04 is built around the Titan Micro TM1637 — 8-level brightness, two-wire serial (not I²C), common-anode digits. It connects over CLK + DIO on any two GPIOs and is powered from 4.5–5.5V per datasheet.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Simple clocks
- Temperature read-outs
- Beginner Arduino projects
Key features
What makes it different
Driver
Titan Micro TM1637: 8-level brightness, two-wire serial (not I²C), common-anode digits
Display
0.56" 4-digit red, common anode, decimal points
Interface
CLK + DIO on any two GPIOs
Supply
4.5–5.5V per datasheet
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Driver | Titan Micro TM1637: 8-level brightness, two-wire serial (not I²C), common-anode digits |
|---|---|
| Display | 0.56" 4-digit red, common anode, decimal points |
| Interface | CLK + DIO on any two GPIOs |
| Supply | 4.5–5.5V per datasheet |
| Size | 50.8 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 4-pin 2.54 mm header |
| Main IC | TM1637(TA2007) (LCSC C5337160) |
| Revision | Rev A |
| Libraries | TM1637Display (avishorp), tm1637 (MicroPython) |
|---|
Performance
Brightness
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | Power | 5V (3.3V works, dimmer) |
| 2 | GND | Ground | Ground |
| 3 | CLK | Signal | Any GPIO |
| 4 | DIO | Signal | Any GPIO |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-D04 TM1637 4-Digit Display (assembled)
- 1 × 4-pin 2.54 mm male header, unsoldered
- 1 × 0.56" 4-digit 7-segment, common anode, red (5461BS type)
Getting started
- Wire the header: VCC, GND, CLK, DIO
- Libraries: TM1637Display (avishorp), tm1637 (MicroPython)
Compare
Which segment display?
| TM1637 4-Digit Display (this board)This board | ET-D01 HT16K33 4-Digit 7-Segment Display | ET-D03 MAX7219 8-Digit Display | ET-D02 HT16K33 LED Matrix Driver | |
|---|---|---|---|---|
| What it does | Large 0.56" 4-digit display on two GPIO pins | 0.56" red 4-digit display on I²C, Qwiic | Eight 7-segment digits on SPI, daisy-chainable | Drive 128 LEDs and scan 39 keys over I²C |
| Interface | CLK + DIO on any two GPIOs | I²C 0x70; Qwiic / STEMMA QT | SPI (DIN, CS, CLK) with DOUT for daisy-chaining… | I²C 0x70; Qwiic / STEMMA QT |
| Best for | Simple clocks | Clocks and timers | Frequency and voltage meters | Custom LED matrices and bar graphs |
| Price | 9 AED | 39 AED | 11 AED | 19 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.