How a quartz watch works - its heart beats 32,768 times a second

Get 75% off NordVPN with this link: https://nordvpn.com/steve and use the promo code steve to get the first 30 days free. Quartz watches have a tiny crystal tuning fork inside that vibrates at 2^15 Hz and there's a really clever reason for that. This video also talks a bit about how mechanical watches work. CORRECTION: Ok, so I actually hung 16 flip flops! So you do need 15. I'm an idiot. The atomic clock video is here:    • How Do Atomic Clocks Work?   The piezoelectricity video is here:    • Piezoelectricity - why hitting crystals ma...   You can buy my books here: https://stevemould.com/books Patreon:   / stevemould   Twitter:   / moulds   Instagram:   / stevemouldscience   Facebook:   / stevemouldscience   Buy nerdy maths things: http://mathsgear.co.uk