Are you tired of desoldering your mistakes? Squinting at resistors only to lose them? Spending all that money on microcontrollers so you don’t have to take something apart every time you want to try something new?

Enter 123D Circuits. 123D's newest addition, 123D Circuits allows you to design, test, share, and iterate on your electronics project without touching a soldering iron. Plan your project, test it, and even CODE in the app. If you take it to the final step and lay out a circuit board you're only a fortnight from finding shiny new boards in your mailbox.

Introducing 123D Circuits.io from circuits.io on Vimeo.

Submit your electronics instructable to win amazing tools even professional electronics designers would love to own. There will be special Judges' Prizes for the Best Overall Project, Best Breadboard Simulations, and Best Educational Instructable.

Multiple entries are accepted, but each entrant can only win one prize. Contest is open to entries from US, Canada [excluding Quebec], UK, China, Belgium, the Netherlands, Australia, Colombia, Germany, Switzerland, Norway, India, New Zealand, and Denmark. The Contest begins at 12:00 a.m. Pacific Standard Time (PT), January 6, 2014. Contest closes for entries at 11:59pm PT, March 3, 2014.

The winner(s) will be solely responsible for complying with any and all applicable statutes, laws (including, without limitation, common law, if applicable), rules and regulations and for bearing any personal income tax, VAT, withholding taxes, customs duties, or other taxes, fees, insurance, surcharges or other costs relating to receiving, claiming or collecting any prize.

Want more contests? Check out Instructables' upcoming contests here!

The 123D Circuits Contest is closed.

Grand Prize

13 Prizes

Runner Up Prize (10)

Ten Runner Up Prize winners will receive:
How It Works

Write an Instructable

Create a new Instructable that fits the guidelines outlined in the contest description above. To be eligible, Instructables must be published between Jan 6, 2014 and Mar 3, 2014 (11:59pm PT).


Upon publishing your Instructable you'll see checkboxes for open contests. Select 123D Circuits Contest. If you have entries currently eligible for entry, it will also show up by clicking "Enter this Contest" on the right side of this page.


Entries are accepted by Instructables staff within one business day Monday - Friday. What matters is the submission time, not acceptance time.


A panel of judges made up of Instructables staff and respected members of the community rate the finalists. The averages of the ratings determine the winners.


When the winners are decided they will be notified and announced here on the contest page.