The Skull CTF

by Wokwi

A mind-bending hardware puzzle in three acts

View all updates Apr 02, 2021

Sleeps Most of the Day

by Uri Shaked

Ahoy Mateys!

So ya got yer Skull. Or, if you didn’t, then she ought to be paying you a visit real soon now. Either way, it’s time to forget about everything else. You have one goal now: get to the top. Nothing else matters.

What You Will Need

How to Get Help

Where to Brag

A Recap of the Rules

  1. No hardware modifications!
  2. Your solution should not rely on any kind of electrical connection to the skull.
  3. Your solution has to be reproducible, and you have to be able to explain how it works.

Send your solutions to uri+skull at wokwi dot com. You will be given a score in exchange.

About the Author

Uri Shaked


$4,254 raised

of $666 goal

638% Funded! Order Below

Product Choices


The Skull

A single The Skull CTF board (☠)


Programmer & Header

Cheat! Or, better yet, design your own puzzles and load them into The Skull's brain using the included SparkFun PGM-09825 AVR Pocket Programmer. Also comes with a ribbon cable and the SMT header you'll need to use it. (Does not include the MiniUSB cable.) Some soldering skill required.



Wokwi creates tools for the Arduino and maker community, such as AVR8js, the Open source Arduino Simulator, and GoodArduinoCode.

Uri Shaked

JA Electronics


PCB Fabrication & PCB Assembly

See Also

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