Fast circuit maker wins Dyson award
Jesus Zozaya, Alroy Ameida, James Pickard and Katarina Ilic, from the University of Waterloo, in Canada, win £30,000 cash to help them finish making the Voltera V-One.
They have also raised more than $500,000 (£331,000) on crowdfunding site Kickstarter.
James Dyson said they were "impressive" and looked set to make prototyping "easier and more accessible".
Mr Almeida said: "When we first started the company, we spoke to many experts who told us we were too ambitious and that it was impossible to create a tool that could effectively prototype circuits."
The Voltera works by laying down different types of inks - one conducting and one insulating - to form a two-layer circuit board.
It can also dispense solder on to the board so individual components can be added to quickly make working hardware.