Introduction: MAX7219 Arduino Clock
Arduino Pro Mini
Step 1: Components
- Arduino Pro Mini,
- RTC 3232,
- DS18B20 encapsulated temperature sensor,
- four 8x8 LED matrix (7219).
- 4.7K resistor
Step 2: Project
The arduino sketch is adapted after a very nice project i found here.
I wanted something easier and i just took the basic mode and i added the temperature reading.
The project was started with an DS1307 RTC module. I changed it later into an DS3232RTC module.That is why you will find some libraries I used with DS1307.
Power supply can be from 5 to 12V on RAW pin.
You can use 5V on pin VIN.
Don't forget the 4.7K resistor between data pin and power supply pin of the temperature sensor.