I bought this bargain diffuser second-hand from Ebay last year. You fill the container with water and add a few drops of an essential oil and it makes your room smell nice. There’s a little ultrasonic emitter inside that turns the liquid into a cool mist that pours forth from the tip.
It works well enough like this. You press a button and it starts. You press the same button two more times and it stops. There are some pretty lights too.
But it has two problems:
-
The default timer is for an hour. This is too long for me - after about twenty minutes, my eyes get irritated from the oils.
-
It really doesn’t need to run all the time.
Clearly, what it needs is an intermittent function. On for a few minutes, then off.
So I thought I’d see if I could add that functionality. Turns out it wasn’t hard at all!
I posted the whole thing with a bunch more pictures over on my page at