This was a lot of fun and gave me some sound ideas for modern devices that could make mass manufacturing of PCB's affordable to anyone that wanted to do small runs of custom electronics but still in the hundreds of unites produced. *A CNC machine with a drill bit and a solder extruder would make printing large and complex PCB's a cheap and quick process.* The bit drills a channel while the extruder passes secondary to the bit filling in the track trace with molten solder, and the bit could also drill the holes for PTH parts. I'll wager this could be done at a cost low enough that small operations could produce hundreds of units a month with just 3 or 4 people assembling them. *In this age of expensive custom musician audio products, hi-fi enthusiast that spend big league and so very many others that it's a viable economy for such an operation.* Prior, ideas like this never got launched because there simply weren't enough inventors and engineers to need to manufacture for themselves, but this has drastically changed today especially with Arduino and so many other cutting edge devices.

Anyone who can draw a circuit with a pen and some components deserves a like. This is pretty good.

you can remove the metal part with pliers and have basically a straw to clean and refill

Those Gallium and Indium are two expensive metal just like the silver ink but something is sure, there are not more options in the periodic table.

Jetstream pens FTW! :D Relatively cheap, non-smeary ink, smooth writing. They got my back in all exams the past two years.

Try spar varnish with any conductive powder (carbon, graphite or metal powders). Instead of ink, for a phenomenally good conductive glue, mix a PVA based wood glue with powdered silver solder (any lead-free non rosin core solder sanded or filed into dust). The pva wood glue and solder powder bonds conductively to aluminum, copper, steel or bare silicon :) Either of these might also make custom resettable fuses, thin semi-transparent conductive coatings on glass for DIY liquid crystal displays (with a very fine powder), or additive circuit board creation (instead of the conventional subtractive/etched copper on fiberglass).

Its pretty cool but does the ink not remain liquid? I presume you can still easily smear the lines

Have you tried this in a inkjet or a plotter yet? I am a little concerned about the price point and toxicity of the indium and gallium rare earth metals. I wonder if this could be done with a simple graphite or cheaper conductive elements.

The easiest way I've found to get ink out of the pen is to wash and dry it in my clothing pockets. :-)

This is brilliant, why can't we use a gel pen or an correction pen, which is big but the mechanism are same

I try to make this ink a lot of kinds of glue but I see that it can not make electricially conductive. I've used silver and activated carbon. So please tell me how can you achive this conductivitiy via glue?

Good Quality ink. The same can be make with cheap materials like Graphite and black paint!

And also the components leads. is it really a successful circuit ?????

The last minute in that great video reminded me of my first attempt at playing scottish bagpipes lol what a distinct sound !! ... I'd like to purchase a ready to use one though ( **good business idea **)

But my question is , gallium distroys other metals . What happens to pen then?

Good idea but the prices for the metals are a doa problem. If it is prototyping we are talking about then prototyping boards or even Perfboard is quick, simple and inexpensive to use.

Great Video. Really deserves a lot more views and comments! I like the idea and great execution but I would ask - how do you "dry" the ink when you are done? Possibly covering with a polyurethane might be an option.

Does it also adhere and work on paper or wood?

I'm curious, why is this better than making conductive ink from say either Graphite or Carbon? They are much easier to come by and doesn't require as much work. Still could make a fun project and I totally endorse experimentation. I'm really just curious how much better if any this method is?

Great work.

will it remain on place when IC gets hot??

It would be nice if you included the price list and links to purchase the items. It might be possible to use ink pen instead of ball penn.

I liked when he put water in the cup to try to solve the metal in the water. :D

can you solder to this?

hello thanks for video , i have graphite powder , i want to ask about the match liquid for mix the graphite, what the liquid is?

will it work on paper? will it dry if used on paper?

Amazing

I have an idea to dramatically improve paints superconductivity

clever. Look up photoetching.

does the paint ever dry?

All you need now is a sheet like paper that can absorb the ink.

Conductive ink for printers. Print your own circuit boards.

Expensive like fuck.

THAT is no good can break easy and make false contact i hate false contacts

10:30 Push me and then just touch me..

Buy a fountain pen:)

And now Russians have just invented a 3d pen that writes with conductive ink. No need for this mess.