Project Kajitsu

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Project Kajitsu Update: DB15 USB-Discrete Board

Mike and I wanted a simple solution that didn’t require some fancy cable or hack job to connect to the screw terminals so we came up with the Kajitsu USB-Discrete only version. This only converts USB (PS3 and XBOX 360) to Discrete Output using 5V logic. Its slimmed down on features but more user friendly out of the box. We have a few on hand soldered up and ready to ship if you want to one with no fuss. We also have bare boards if you want to save a few bucks.

Fully built Kajitsu Boards: $29.95 shipped in the USA
Board only: $9.95 shipped in the USA

Drop me a line at jasenhicks_AT_gmail

Project Kajitsu – Official Logo

Project Kajitsu Logo

Project Kajitsu Logo

Project Kajitsu – Demo Video


Project Kajitsu Demo

This demo was filmed using three cameras to catch all of the action in real time! We demonstrate the first party XB360 (Wireless), PS3, and Wiimote (bluetooth) support using the project with a custom built SuperGun. Enjoy!

Project Kajitsu Software Update – RC14


Project Kajitsu’s software has been updated to RC14.


  • Wireless XBOX360 Support (2 Controllers, 1 Wireless Dongle)
  • Hot Plug USB Cables for wired XBOX 360 and PS3 Controllers

Testing Completed:

  • Verified all 2P controls work properly
  • Extensive testing with XBOX 360 controllers

Download RC14 here:

Project Kajitsu Wiimote Support

Nintendo Wiimote

Wiimote Bluetooth support is now being tested. This demo shows the Pi booting and pairing to a Wiimote.

The Bluetooth drivers and the pairing process adds some delay to the total system start-up time and if this can be reduced we will add this functionality to the mainline Kajitsu PS3/XBOX360 code.

Check out some fun SHUMPS action below!

Project Kajitsu Version 0.4: Beta Testing

Project Kajitsu V0.4

Project Kajitsu’s Hardware has been transformed with Version 0.4. We have left the formal pi-hat spec for size behind us in lieu of a more user friendly DB15 version of the board. This version of the board offers the convenience of the the DB15 ports while maintaining the flexibility of the .100″ screw terminals (both are optional, but at least one should be installed). Additionally, we simplified this board making it an “out” board only, meaning you would only use it to convert PS3/XBOX360 controllers to discrete outputs on a +5V logic setup such as a SuperGun!

Changes include:

1. Player 1/2 status indicator. The board will show which player has a USB controller plugged in.
2. Removed the diode from the incoming +5V line as our initial testing showed brown-outs on the Raspberry Pi.
3. Added DB15 ports for simplified SuperGun/NEO-GEO connections
4. Removed the Logic Selector Jumpers. This is a +5V Logic Hat.
5. Set the transceivers to be output permanently.
6. Form factor change. It still mates to the Pi B+ properly.

Project Kajitsu V0.4

Moving beyond the Pi Hat Standard to make Project Kajitsu more user friendly

Project Kajitsu as a general-purpose external peripheral interaface

Noritake VFD

This video illustrates the Kajitsu Pi Hat being used as an interface between a Noritake VFD Display and the Pi B+’s GPIO pins. The octal buffers provide line driving capabilities and also protect the PI’s 3.3v I/O pins fron the display’s 5.0v RDY line. This demo uses the same I/O routines as the joystick code but in this case it’s bi-directional and much more data is being transferred.

10.1.2014 – covers Project Kajitsu!


We want to thank for picking up on our project and sharing it with their user base. Its truly an honor for our little project to be picked up and shared on other sites! See the full writeup via the link below!

Project Kajitsu Bluetooth Proof of Concept

Although it’s not active in the initial release, Bluetooth testing with PS3 Sixaxis pads works well. We need to figure out the best way to simplify the pairing process but functional tests were 100% successful.

Project Kajitsu: A low quality iPhone Demo