I made this Arduino humidity controller for musical instruments.
I am completely new to the Arduino and electronics so I’m sure there must be more clever design but at least the unit is working for months.
Basically, it maintains the humidity like other humidifiers but this unit has the Luthier’s mode. There might be some humidifiers (in the art restoration industry?) which can do the same thing but I couldn’t find any so I decided to make one by myself.
I put my guitars in this Storage Wardrobe so that I can use a small humidifier. I need to fill its water tank only once every week.
I setup the rig like this;
Humidity sensor(the arduino unit) and humidifier shouldn’t be too close.
When the unit is turned on, it asks me how I want to operate the unit. I can set the followings;
(1) operation Mode (NORMAL or RECOVERY)
(2) desired LOW and HIGH humidity,
In the above setup, the USB fan also turns on when the humidifier is on
The unit can run in the Luthier’s mode(I call it RECOVERY Mode). For example, if I want to set 40% – 46% but the current room humidity is bad enough 25%. Suddenly adjusting 15% is not good for acoustic guitars(or violin, art material, etc). Some good luthiers want to adjust the humidity little by little in hours or days. This unit can do this gradual adjustment from 1 to 120 hours.
When the water is out, a piezo buzzer alarms me every 10 minutes.
In case of power outage while I am out;
When the power is back, it bypasses the initial menu screen questions.
Please contact me if you can think of any other useful functions I should implement