Make your plant smile using Arduino




This is a funny project that makes our plants “talk” to us. It’s very simple and you can create it in few hours. We use a sensor to read the soil moisture of our plant and a led matrix to dislay how the plant “feel”. You can use an ATtiny85 as a microcontroller.

Make your plant smile using Arduino




Step 1: Order Materials

Step 2: Wiring Instructions

To wire your ATtiny85 to your Sensor and the MAX7219, connect the following pins:

  • ATtiny85 Pin1 –> NC
  • ATtiny85 Pin2 –> Sensor A0 (Analog out)
  • ATtiny85 Pin3 –> NC
  • ATtiny85 Pin4 –> GND
  • ATtiny85 Pin5 –> MAX7219 DIN
  • ATtiny85 Pin6 –> MAX7219 CS
  • ATtiny85 Pin7 –> MAX7219 CLK
  • ATtiny85 Pin8 –> +5V
  • L78L05 Pin1 –> Output +5V
  • L78L05 Pin2 –> GND
  • L78L05 Pin3 –> Input from battery +9V

Don’t forget to connect all the GND together (Sensor, Attiny85, MAX7219). We suggest to connect and the two capacitors to your L78L05 (see the image on the right).

Make your plant smile using Arduino circuit

Step 3: Prepare the ATtiny

To program your microcontroller (ATtiny85) you will need an Arduino Uno or a Tiny AVR Programmer.

If you choose an Arduino Uno to program the ATtiny follow the steps below:

Connect the Arduino to the ATtiny as follows:

  • ATtiny85 Pin 8 – Arduino +5V
  • ATtiny85 Pin 4 – Arduino Ground
  • ATtiny85 Pin 1 – Arduino Pin 10
  • ATtiny85 Pin 5 – Arduino Pin 11
  • ATtiny85 Pin 6 – Arduino Pin 12
  • ATtiny85 Pin 7 – Arduino Pin 13

 

For more detail: Make your plant smile using Arduino




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