Far out idea

A crypto-currency which is backed by ‘gold bars’ and coins made of recycled plastic. Counterfeiting is not a problem; it’s mining.


hey, not sure I understand all but that’s currently on the table (feature nr.2 – see also the remarks about shelf product scanning and PP wide QR codes for everything on the way, …).
I am only doing things and have no idea how much sense it makes but feel free to add details about this. If you think it’s any good, I am all in (especially a full automated coin maker machine :-). Friends developed ‘fair-coin‘ and very possible we just copy over all to PP.

Yeah, I saw one of his portraits at an art festival. Your brain sees the portrait, then you focus on the individual screws, and then back to the portrait.

@s2019 wow that hurts by brain AND my mind!

Or you could laser engrave the pattern into a blank coin.
Those pin blocks always bring my productivity to a hard stop. The related drywall screw art http://www.andrewmyersart.com/#/holding-on-to-my-thoughts/

@ppboys seems haptic actuators are a cheaply available component now: https://uk.farnell.com/texas-instruments/drv2605yzft/haptic-driver-erm-lra-actuator/dp/2307949?gclid=EAIaIQobChMI0PD-sPet5AIVCYjVCh06fg9tEAQYBCABEgI4MfD_BwE&gross_price=true&mckv=eRO8WYWS_dc|pcrid|78108376509|&CAWELAID=120173390000222732&CAGPSPN=pla&CAAGID=14406255429&CMP=KNC-GUK-GEN-SHOPPING-2307949&CATCI=pla-57456876370

but hey thats all stupidly complicated. Why not just 3d print the QR code and then toss it into a round mould and squash some melted plastic on top of it?

Alternatively to produce a flat bi-coloured coin it could be an array of 3d printer-type filament extruder nozzles pointing up into the bottom of the mould, extruding with one colour, with a larger injector sending a different colour plastic into the top of the mould. The same stacked array approach might be neccessary.

@ppboys Fun stuff indeed! Not sure the bowden cables are necessary, there are tiny stepper motors available very cheap which could be stacked in offset layers and drive the lead screws directly. Sketch represents 8.5x9mm steppers in 4 layers to give a 10×10 grid in under 50mm square (but yes I can see 20×20 would be required)

@timberstar, that’s porn for makers, thanks. I remember we tried developing a braille keyboard the other day but had to cancel it. That time it was too expensive to get those parts. May be it’s cheaper to do now days. I can imagine we only need a grid of 20 x 20 pins for the PP coins; driven by spring loaded lead screws attached to a bowden cable as in a Dremel extension cord. Scanning wise, I would opt for ink just. The available QR scanning code libraries can be adopted relative easily (nice exercise as well). Fun stuff 🙂

@eugeneb50 Very cool, maybe could be based on haptic display technology? In that scenario the pin things are called taxels- check out the BlindPad or the shapeShift on youtube…

nice idea, really. that coin mold would be an amazing best seller in the bazar. Those pins enable enough unique codes for a while (~350 workspaces to be promoted at the moment) and I guess in 10 years after PP crashed the stock market we just increase coin size 🙂
I can’t wait for the headlines ‘ … arrested for annoying the cash machine lady, money counterfeit & ‘laundering’. A nice way bringing plastic back to shop btw. Somebody wants to be the bank ?

This made me think of this pin art pinpressions board. Perhaps something like this with actuators could be made to make unique coins with codes on them.

There is a trend for companies to start their own crypto-currency as an alternative to selling shares. There are thousands of them out there now. As an open-source, decentralized movement, PP cannot sell shares, but a PP coin could be a good way for all of us to generate funding out of the growing appetite in society for initiatives which address the plastic problem. If I want to buy a shredder, for example, I can sell PP coins in my community to fund it, and in the process both generate awareness and engagement, and boost the value of the coin. The plastic coins and bars themselves would just be tokens, something of a promotional gimmick, the actual validation of the coin still takes place online.
Hmm has anyone tried to injection-mould a QR code yet?

@timberstar , I think @rudolfsskuja has a great start on the ‘gold bars’, looks like they stack well too. http://onearmy.world/community/forums/topic/precious-plastic-latvia/