Electrónica: O driver MAX7219 para controlar a matriz de LEDs 8x8

Data de publicação: Mar 07, 2020 8:49:21 PM

O Kit trás uma matriz de LEDs 8x8 mas não inclui o seu controlador: O driver MAX7219.

Este pode ser facilmente adquirido. Custa cerca de 3 Euros (ver aliexpress)

MAX7219 is an integrated serial input / output common-cathode display drivers , which connects the microprocessor 7-segment digital LED display with 8 digits , bar graph can also be connected monitor or 64 separate LED. On type B BCD encoder includes an on-chip , multi-channel scanning loop , segment word drive, but also a 8x8 static RAM for storing each data . Only one external register is used to set the segment current for each LED.

A convenient four-wire serial interface can connect all common microprocessor. Each data can be addressed in the update does not overwrite all of the display.

MAX7219 also allows the user to select each of the data code or not coded .

The entire device includes a 150A low-power shutdown mode, analog and digital brightness control, a scan-limit register allows the user to 1-8 bits of data, there is an LED light so that all the detection mode.

Requires only 3 IO ports to drive each dot.

No flashing dot matrix display. Support cascade.