A pen plotter adapted with a brush to paint in oil.
Project showcase by Guiye Perez Bongiovanni
A discussion about digital sound synthesis.
by 3 developers
Creative approach to building electronic chessboard upon RFID technology, Hall effect sensors, and Arduino Mega.
Project tutorial by Tahir Miriyev
The code shown in this project is too simple and controlled by the Serial interface. Look at my project (https://www.hackster.io/M-V-P/attiny85-plants-care-493db9) or those of other hacksters for autonomous systems, based on analog input. Come with new ideas!
Use A0 pin for analog input. For more detail : https://maker.pro/arduino/projects/arduino-soil-moisture-sensor. D0 is just a on/off signal after you select a threshold value using a potentiometer. Good luck!
If the water reservoir is empty, the motor will run continuously, not necessarily failing. The real world application is not so simple. Each plant needs a different amount of water! A relatively long test period is required. Best advice: get a bottle big enough for the time you are away. In my project https://www.hackster.io/M-V-P/attiny85-plants-care-493db9 a 5L bottle is enough for two-three months.
Otherwise: put a water level sensor in the bottle and connect it by WiFi to your phone: you will get a message every 3 months to fill the bottle!!!
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