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https://github.com/octaprog7/matrixdisplay
MicroPython module for work with MAX7219 led matrix 8x8 display.
https://github.com/octaprog7/matrixdisplay
display led matrix micropython
Last synced: 1 day ago
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MicroPython module for work with MAX7219 led matrix 8x8 display.
- Host: GitHub
- URL: https://github.com/octaprog7/matrixdisplay
- Owner: octaprog7
- License: mit
- Created: 2022-11-17T12:18:54.000Z (almost 2 years ago)
- Default Branch: master
- Last Pushed: 2022-11-29T11:45:18.000Z (almost 2 years ago)
- Last Synced: 2024-04-22T12:34:15.728Z (7 months ago)
- Topics: display, led, matrix, micropython
- Language: Python
- Homepage:
- Size: 1.2 MB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
Awesome Lists containing this project
README
# MAX7219
MicroPython module for work with MAX7219 led matrix 8x8 display.
Just connect your matrix display board to Arduino, ESP or any other board with MicroPython firmware.
Supply voltage display board from 4.0 to 5.0 volts! Use five wires to connect (SPI bus).
1. +VCC (Supply voltage)
2. GND
3. COPI/SDO - Controller Out, Peripheral In
4. SCK - Serial Clock
5. CS - chip select
## Connection diagram
If your microcontroller is powered by 5 volts, then you do not need a Level Shifter.
If your microcontroller is powered by 3.3 volts, then you will need (!) a Level Shifter.
Please see: https://www.raspberrypi-spy.co.uk/2018/09/using-a-level-shifter-with-the-raspberry-pi-gpio/
Warning!
The operation of a microcontroller powered by a voltage of 3.3 Volts with a matrix indicator operating from 5.0 Volts can damage the MCU!
### Arduino Nano RP2040 Connect with RP2040 Board
MCU board Level Shifter Display
-------------------------------------------------------------------
D13 (SCK) board pin LV1<->HV1 SCK display pin
D11 (COPI) board pin LV2<->HV2 DIN display pin
D10 (CS) board pun LV3<->HV3 CS display pin
+3.3 V board pin LV pin
+5 V board pin HV pin
+5 V board pin +5V display pin
GND board pin GND pin GND display pin
Don't forget to short the SJ1 jumper on the underside of the MCU board! Please
see Nano RP2040 Connect schematic: https://content.arduino.cc/assets/ABX00053-schematics.pdf
## Upload
Upload MicroPython firmware to the NANO(ESP, etc) board, and then files: main.py, mtrx_disp.py and sensor_pack folder.
Then open main.py in your IDE and run it.
## Power Supply Requirements
It follows from the documentation that the typical current consumption of an 8x8 LED segment (all LEDs on) is 330 mA. Therefore, it can be considered that the segment draws about 200 mA at 5 Volts. If there are 4 segments, the consumption will reach 800 mA at 5 Volts. 8 segments consume 1.6 A at 5 Volts.
### Capacitors
For every 4 segments, you need to install two capacitors in parallel with the power supply. The first is 100 uF x 16 Volts. The second 10 nF x 25..50 Volts. The terminals of these capacitors should be located as close as possible to the power terminals of the matrix indicator! The length of printed conductors or wires must be minimized!!!
Without good power, the device will not work properly!
# Pictures
## IDE
## Breadboard
## Video
Link to video: https://www.youtube.com/watch?v=X4qcNem8NmY