Massage hat

Finally

It will be safer to power the star not from one discrete output, but for each LED separately.

I spent so much energy on writing a program to perform parallel tasks on arduino, and because of a bad servomotor, the microcontroller is unable to cope with the load. But it's okay I'll take another arduino and everything will work as it should.

Now I need to check the performance of the pulse sensor

Looks funny and works as should.

If only all neatly solder...

Now I will take a cuff for measure pressure and cross it into a hat(like a pilot's cap)

To get a holistic thing, I must first check all its components separately. At first — servomotor.