Check it out on SasaKaranovic.com/projects/diy-heart-keychain
This one is a very simple but cool project, something that I would recommend to anyone who is interested into DIY electronics, gadgets and learning new stuff in general.
It is definitely one of those projects that don’t require too much time but you can learn a lot by making it and also earn a lot of credit by sharing it with your friends and family.
See it in action
Schematic and PCB
Find out more cool projects
Find more cool projects on my website.