TM1638 7 Segment Display & Keypad

This 8 digit seven segment display module (HCMODU0095) uses a TM6138 controller allowing full control of the display using just 3 digital pins on a microcontoller. In addition to the seven segment display there are 8 individually controllable 3mm LEDs and a keypad with 8 push buttons arranged in a single row. These can also be controlled through the TM6138 IC and so require no extra digital pins. A standard 5 pin header provides easy interface to the module from your microcontroller. 

Additionally if you plan to use this module with an Arduino development board we have created an exclusive library (HCTI6138) to make controlling the module as easy as possible. The library will provide full control over the seven segment display (providing the ability to display alphanumeric text), the 8 LEDs, and reading the state of the keypad. It is also capable of controlling multiple modules from one Arduino and is only limited by the number of spare pins and memory. The library can be downloaded from the software section of our support forum.




Product code: HCMODU0095
Supply Voltage: 5V
Controller: TM1638
Dimensions: 76mm x 50mm

Example: Driving the module from and Arduino with the HCTM1638 library

Example Arduino sketch, library and datasheet available on our support forum here.