Today I did about engineering part of our necklace.
I succeeded to make the circuit work that we suffered.
The problem was simple. The pin arrangement of the NPN power transistor was different from that they thought.
The lesson is “Check the data sheet.”
Here you can see the data sheet of the transistor.
You can see what I did here:
I confirm that aroma part that heats filaments and emits the aroma and sensing part that detect posture are working with Arduino Nano.
This is the circuit I used this time.
Matters
・There should be enough wet around filaments. If it isn’t, it doesn’t get smoke.
・I used a tube for filament to keep the aroma in a small area. It gives a strong smell.
・Detecting posture precisely is the next step as sensing part.
Here I took a video when a tube with aroma and filament emits a smell:
Shin