I have been doing some research on the forum, but can´t really find any solution for this.
Setup: Rpi 3 B, Debian Jessie, MyDevices, hooked up with 4 relays, a light sensor and 2 temperature sensors. System will be running on a romote location off a 12 volt solar system.
The room needs to be ventilated with a 12v fan (computer fan w/pwr output). I need a fan that can move some air, so powering off the Rpi is no option.
Is there any way of ontrolling the 12v fan rpm via the Cayenne dashboard? What kind of electronics would I need? It would involve regulateing the 11.5-15v up or down from, let´s say 4v to 12 v, thereby increasing or decreasing the speed.
I have a Arduion motor shield ( https://www.adafruit.com/products/1438 ). Can this be used with the Pi to control the fan on/off and fan speed. In that case, where can I find the apropriate code, working with a slider i Cayenne dashboard?
Very greatfull for help on this one.