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Wide operating voltage 3.3V to 5V;
PCB board size: 40mm*22mm (4 digits)
71mm*22mm (8 digits)
Digital tube model: 0.36 4 digits common anode

Pin Definition:

VCC: Power supply
DIO: Serial Data Input
RCLK: clock pulse signal
SCLK: input clock signal
GND: Ground
GND: grounding

4-digit Digital Tube Module

8-digit Digital Tube Module

TM1638 8 Bits Keyboard LED Digital Tube Module

Function Introductios:

Only need 3-wire control.
Adapts TM1638 digital tube drive chip.
Common anode LED digital tube.
Only need three common IO and could drive, no need MCU scan, save MCU sources.
With 8 8digital tube (including decimal point).
16 buttons.
Support 8 degree brightness adjustment.

MAX7219 LED Dot Matrix 8 Digit Digital Tube

Onboard 0.36 inch red common anode 4-digit 8-segment digital tube, onboard 4 8550 triodes driven in parallel, onboard 4 bit-driven current limiting resistor and 8 segment-driven current limiting resistor.

Product parameters:

1. Working voltage: 3.3V-5V

2. Pin header leads to common pins, including a VCC pin, 4 bit drive pins (D1D2, 0D3, D4), and 8 segment drive pins (A, B, C, D, E, F, G, DP)

Onboard 2 way 74HC164 serial to parallel chip, onboard 2 way 0.36 inch red common positive 4-digit 8-segment digital tube, onboard control interface, convenient for external equipment

Product parameters:

1. Working voltage: 5V

Instructions for use:

Wiring instructions (take the provided program as an example, you can connect any IO port, modify the port definition in the program):

VCC-5V

GND-GND

DAT = P23

CP = P22