IC MAX7219 สำหรับขับ 7 Segment 8 หลัก MAX7219CNG MAX7219CN MAX7219C MAX7219

IC MAX7219  สำหรับขับ 7 Segment 8 หลัก MAX7219CNG MAX7219CN MAX7219C MAX7219

IC MAX7219 จำนวน 1 ชิ้น

ใช้ขับ 7 Segment ได้สูงสุด 8 หลักด้วย IC เพียงตัวเดียว สามารถต่อใช้งานร่วมกับ Arduino ได้ เชื่อต่ออินเตอร์เฟสแบบ SPI

ตัวอย่างโคด Arduino IC MAX7219  สำหรับขับ 7 Segment 8 หลัก MAX7219CNG MAX7219CN MAX7219C MAX7219

#include "LedControl.h"
// Arduino Pin 7 to DIN, 6 to Clk, 5 to LOAD, no.of devices is 1
LedControl lc=LedControl(7,6,5,1);
void setup()
{
// Initialize the MAX7219 device
lc.shutdown(0,false); // Enable display
lc.setIntensity(0,10); // Set brightness level (0 is min, 15 is max)
lc.clearDisplay(0); // Clear display register
}
void loop()
{
for(int i=0; i<8; i++){
lc.setDigit(0,i,i+1,false);
}
delay(1000);
}

รายละเอียด IC MAX7219  สำหรับขับ 7 Segment 8 หลัก MAX7219CNG MAX7219CN MAX7219C MAX7219

The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is compatible with SPI™, QSPI™, and MICROWIRE™, and has slew-rate-limited segment drivers to reduce EMI.

A convenient 4-wire serial interface connects to all common µPs. Individual digits may be addressed and updated without rewriting the entire display. The MAX7219/MAX7221 also allow the user to select code-B decoding or no-decode for each digit.

The devices include a 150µA low-power shutdown mode, analog and digital brightness control, a scan-limit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on.

For applications requiring 3V operation or segment blinking, refer to the MAX6951 data sheet.