Difference between revisions of "MAX7219X4"
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*** Arduino UNO pin 11 is connected to the CLK | *** Arduino UNO pin 11 is connected to the CLK | ||
*** Arduino UNO pin 10 is connected to CS | *** Arduino UNO pin 10 is connected to CS | ||
− | * [https://github.com/bartoszbielawski/LEDMatrixDriver LEDMatrixDriver] | + | * [https://github.com/bartoszbielawski/LEDMatrixDriver LEDMatrixDriver] - Alt driver |
− | * Can drive more than 8 segments (limited only by memory) | + | ** Can drive more than 8 segments (limited only by memory) |
− | * Writing to the display is controlled by software | + | ** Writing to the display is controlled by software |
− | * Much faster because it uses hardware SPI with soft SS | + | ** Much faster because it uses hardware SPI with soft SS |
** Recommended pins for Arduino Uno: | ** Recommended pins for Arduino Uno: | ||
*** DIN is connected to 11 | *** DIN is connected to 11 | ||
*** CLK is connected to 13 | *** CLK is connected to 13 | ||
*** CS is connected to 9 | *** CS is connected to 9 | ||
+ | * [https://github.com/abaskin/MAX72XX MAX72XX] - Alt driver | ||
+ | ** One or more 7-segment displays driven by a MAX7219 or MAX7221 IC | ||
== Test == | == Test == |
Revision as of 14:25, 26 July 2022
Features
- (4) 7 Segment displays
- 32 digits
- Can display decimal, hex values
- Each display has 8 of 7 segment LED displays
- "Blue" card
- 3.3V operation
- 3.3V to 5V Level shifter
- Requires 3.3V and 5V power supplies
Programming
- MAX7219X4 Arduino GitHub repository
- Uses Arduino LedControl library
- Library only writes to (1) 8-digit display
- Pins
- Arduino UNO pin 12 is connected to the DataIn
- Arduino UNO pin 11 is connected to the CLK
- Arduino UNO pin 10 is connected to CS
- Uses Arduino LedControl library
- LEDMatrixDriver - Alt driver
- Can drive more than 8 segments (limited only by memory)
- Writing to the display is controlled by software
- Much faster because it uses hardware SPI with soft SS
- Recommended pins for Arduino Uno:
- DIN is connected to 11
- CLK is connected to 13
- CS is connected to 9
- MAX72XX - Alt driver
- One or more 7-segment displays driven by a MAX7219 or MAX7221 IC
Test
Test Modules
SenShld | Desc | MAX J1 | Color |
---|---|---|---|
VCC | VCC | 1 | RED |
GND | GND | 2 | BLK |
D12 | DATAIN | 3 | WHT |
D10 | CS | 4 | BRN |
D11 | CLK | 5 | YEL |