24.43 x 33.02mm, this is going to be tiny. Using 0603 components and an soic-8 555 as well as an soic-16 4017 based decade counter. A 100K pot will be used to adjust the speed of the chasing LEDs.
I know it's been done, but NOT for the same end use purpose. One of the reasons I'm doing this is for my own edification... It will never be housed in a standalone replica case, at least not by me.
It IS a nice project that tiny lil keychain version, seen it around. I did consider buying one at one point, but figured I might as well give it a go myself. Glad to know there are more peeps like me who have fun doing this stuff.
it's been done, and VERY nicely, I might add. I was fortunate to have helped out in a small consulting capacity.
https://www.kickstarter.com/projects/madgeekcollectibles/mini-flux-capacitor-back-to-the-future-collectible