TM1638 8-Digit 7-Segment Display & 8-Key Module
Currently unavailable
No store has this product in stock right now. Prices below are the last ones we recorded.
Prices updated: 12 Oct 2026
Price history
Lowest daily price, last 90 days
Not enough price history yet.
About this product
A display and key module built around the TM1638 driver chip, with 8 seven-segment digits, 8 LEDs and 8 keys on one board. The TM1638 handles display and key scanning, so a microcontroller needs only three I/O pins. Used for counters, clocks and simple user interfaces on AVR and Arduino boards.
Specifications
- Driver chip
- TM1638
- Digits
- 8 digits, common cathode
- LEDs
- 8
- Keys
- 8
- Interface
- 3 I/O pins
Frequently asked questions
Which pins do I connect to the microcontroller?
The module uses a three-wire interface: STB (strobe), CLK (clock) and DIO (data), plus VCC and GND. Connect these to three digital pins and set them in your code.
Do I need a special library?
TM1638 libraries are available for the Arduino environment and handle the protocol for display and key scanning. You can also write the register commands directly.
