SCADBoard Library and SCADuino


First working SCADuino Prototype

First working SCADuino Prototype

SCADBoard is a library for making 3D Printable Circuit Boards

SCADBoard is a library for OpenSCAD to make prototype circuit boards. It makes 3D models which can then be exported and printed using a 3D printer. SCADBoard is open source and fully customizable.


SCADuino is a 3D printed Breadboard Arduino

SCADuino is a 3D printable version of the Breadboard Arduino at Using OpenSCAD and the SCADBoard library it is easy to create a 3D printable breadboard like the Breadboard Arduino.



“This Sumo Bot is a Scream”

Sumo Bot Entry for 8th Grade NYS 2010-11 Science Olympiad by Justin Fisher

Screaming Locust is dual-motor remote-controlled tank-style sumo bot featuring an Arduino microcontroller controlling two high-torque motors with orbital transmissions. Built for low speed pushing its custom motor shield uses a combination of 3-volt relays and fast switching transistors to provide variable speed adjustment and low heat characteristics while battling opponents. It is powered with eight nickel-metal hydride cells, and remotely controlled with dual Wii Nunchuck remotes for simultaneous pilot and co-pilot operation.

In keeping with tradition, the Screaming Locust’s extruded aluminium front bumper and aluminium chassis provide low-weight and high-strength and act as the bot’s main heat sink. The narrow chassis and oversized 3.5 diameter soft rubber tires allow this bot to run inverted.

 At 3.66 lbs the Screaming Locust is a formidable opponent.
Screaming Locust top side view with major features

Taking almost 12 months to make, the Screaming Locust is built to push.


  • 2 high torque symmetrically balanced motors with locked stopped position and orbital gear transmissions
  • Welded and threaded aluminium axils with direct driveshafts
  • Nickel-metal hydride rechargeable cells
  • On-board ATMEL ATmega328 microprocessor in Arduino Duemilanove configuration
  • 2.4 Gigahertz wireless communications with 433MHz sideband
  • Two sided operation
  • Rugged hand crafted aluminium chassis
  • Custom power switch cover imported from china
  • On-board radio for tunes
  • Relays and fast switching transistors with electrically isolated left and right channels
  • Remote control operation with Wii nunchuck
  • Dual 100+ decibel sirens
  • Practice golf ball for single third wheel.

Special thanks to

  • Arduino –
  • Adafruit – for their parts and tutorials
  • Tod Kurt – for his instruction and inspiration
  • Gold Coast Hobby for motivation
  • Dr. Wolf, Mr. Lee and Mr. Maier – for their sponsorship
  • Paul Kurtlando – for his battery advice
  • Jose B. – for his expert TIG welding

Parts, software and help from Arduino, Mouser, Black & Decker, ThingM, Adafruit, Digi, ATMEL, TI Sparkfun, Fun Gizmos, Radio Shack, Duracell, ST, Seeed Studio and others

LV Tanker Takes 5th Place Medal

LV Tanker Takes the 5th Place Medal

In the NY Science Olympiad Regional Finals at Webber Middle School, the LV Tanker plowed its way to 5th place of 43 contestants.
The Tanker was the only sumo bot powered by an Arduino. The LV tanker pushed its way through the semi finals and – with is blinking LEDs and front mounted laser the Tanker was a real crowd favorite – being the only contender to be controlled by a custom 2.4 GHz remote with Wii Nunchuck. But in the end, the Tanker got blindsided from the side – its only weak spot, and was pushed out.

Thank you all for your support and ideas.



Sumo Bot Entry for 7th Grade NYS Science Olympiad by JP

This Sumo Bot runs on low voltage batteries and uses a programmable Arduino microcontroller for all controls. A second Arduino communicating via 2.4 GHz XBee is used for remote control. The remote talks I2C to a Wii nunchuck joystick with accelerometer. The Tankers high-torque motors and locking transmissions, plus double sided operation with automatic attitude detection make it a tough challenger. It was designed to meet the NYS Science Olympiad Class “B” specifications.

The LV Tanker Top-side View

Tanker bottom-side view with major features
Bottom-side view showing lightening holes, homemade remote control, and initial design in Blender

Starting with a design in Blender nearly 11 months ago the LV Tanker took estimated 250 hours to build, 3 prototypes, 4 motor shield designs, and many hours of programming.

  • 2 high torque low voltage motors with orbital gear transmissions in a tank-style configuration
  • On-board ATMEL ATmega328 microprocessor in Arduino Duemilanove configuration with 32Kb memory and 16Mhz clock speed
  • 2.4 Gigahertz wireless mesh network communications based on the XBee
  • Laser assisted guidance
  • Multiple programmable modes
  • Automatic attitude detection for seamless two sided operation (it can be flipped over and still drive and nunchuck automatically reverses)
  • Rugged aluminum, steel, & plastic construction
  • 9 individually controlled LED status indicators
  • Piezoelectric “speaker” for audio signals
  • Symmetrically balanced motors with locked stopped position by Black & Decker
  • Direct driveshaft for main axels, light-weight Nylon chain driven secondary axels for tank-like operation
  • Transistors with electrically isolated left and right channel motor relays
  • Operation with Wii nunchuck joystick and accelerometer control or old-school 2.4 GHz wireless Arduino based joystick

Special thanks to:

  • Arduino –
  • Adafruit – for their parts and tutorials
  • Tod Kurt – for his instruction and inspiration
  • Gold Coast Hobby for motivation
  • Dr. Wolf, Mr. Lee and Mr. Myer for their sponsorship
Feel free to contact us for more information, code etc.
  • School/Name: Locust Valley Tanker
  • L: 30cm, W: 29.5 cm, H: 7.5 cm
  • 1.982kg (U.S. PO Weight)
  • (4) 1.5V “AA” and (4) 1.5V “C”
  • 2.4 GHz wireless communication
  • By JP

Parts, software and help from Arduino, Mouser, Black & Decker, ThingM, Adafruit, Digi, ATMEL, TI Sparkfun, Fun Gizmos, Radio Shack, Duracell, ST, Seeed Studio and others.

H-Bridge Motor Controller

After burning out the H-Bridge motor controller from Adafruit we tried the NYT version and had the same problem. We have started a new design based on the design by Radu Motisan at We have laid it out in Eagle and built it on a breadboard and its working well so far. We are trying to add forward and reverse LEDs before we move it over to a Radio Shack 276-150 board. If you need the parts list available from Mouser let us know. Eventually this overheated when pushing dead weight at a full stop as well.

The Prototype “LV Tanker”

The first prototype with working Arduino, Adafruit motor shield, XBee, XBee adapter, motor power pack and 9V Arduino power, plus the Arduino sketch and Windows controlling program. The first try was buggy but working. Update: It turns out that the rechargeable power pack (from a swiffer) used to run the 2 DC motors was overheating the H-bridge on the motor shield. After switching to 4 AA batteries everything ran smoothly and we were able to drive it around the house. But eventually we burnt out the motor shield.

XBee Adapter Kit

Making the XBee adapter … shown about 1/2 done. After configuring with a TTL cable and testing, the motor shield and the XBee adapter (both from Adafruit) were easy to get working together. (We were able to get analog pins 14-19 working fine as digital pins but could not get NewSoftSerial to read more then 2 chars in a row without errors so we went back to pins 0 and 1 which worked fine).