PWM5 Femto PCB
Sponsored by JLCPCB ($2 for 10 Boards): https://jlcpcb.com
Not merely microscopic nor nano-sized, this PCB is way smaller than that. Even pico-scale doesn't adequately describe this printed circuit board. It's the PWM5 Femto :)
Apologies for the low frequency background noise - caused by my Ryobi fan.