黄土马家

TM1640 red and green dot matrix 8x8-Laowu 8 hair

Overview

Red and green light up together to create yellow.

The borders are perfect, exactly the same size. There is one thing, it is impossible to put a nut in the positioning hole after welding, so the positioning hole is very helpless unless it is placed and stretched out in advance.

TM1640 solution single IC driver

TM1640 is a dedicated circuit for LED (light emitting diode display) drive control, display mode (8 segments × 16 bits), and IIC-like interface.

There are exactly 28 power, signal, and driving pins arranged in one go. It is exquisite and not sloppy at all, which is amazing. .

I bought another model, GN1640, which should have the same driver.

Red and green two-color dot matrix in Laowu Digital Store

The 80-cent dot matrix in the Laowu store seems to be still on sale, with 24 pins in red and green colors. The pin position is 8+, red 8-, green 8-, exactly 8x16.

This package was drawn by an old man before, so I measured it and drew it again.

There’s nothing much to say about this, light-emitting diodes.

PCB routing is adjusted based on automatic routing.

The driver is not original to me. , is an old man from CSDN. portal

I did a little bit of transplantation, using the STC8 microcontroller, and attached the driver Keil project.

It turns out that these two chips (GN1640 and TM1640) can be replaced pin to pin and the program remains completely unchanged. The price of the former is more affordable, right, you know.

Design Files

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Update:2025-07-08 15:49:13

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