I’m currently working on a project for which I’m now building an activation system.
What I want to do is to turn on my system placing hands on a surface and waiting the temperature on that surface goes up due to the heat released by the hands;
Here’s a terrible (and maybe unnecessary) sketch
this means the hands won’t be in direct contact with the sensor that is likely to be under that surface (I suppose a metal surface is better?).
The way I thought of doing it is to detect heat change and not just a specific temperature. The metal plate should maybe activate if it increases X degrees in temperature over a minute or so but not if the room temperature changes throughout the day.
Due to my inexperience, I don’t know which temperature sensor is the best for this job.
“Best” here means both that is able to do this task, both easy use but also cheap.
the sensors I’ve been looking at for now are these:
One last note: I don’t care about this activation system to be fast. Actually it’s quite the opposite, I’ll code it in a way that takes a certain time. I need the interaction to be slow.
If you can help me in chosing the best one I’ll appreciate a lot
Thanks in advance!