about RaspberryHabu

  • Addon board for Raspberry Pi.
  • Stackable or connect by cable.
  • Except RTC IC, It is composed by DIP parts. Even an amateur is easy to assemble it.
  • It is released in FABLIB. Anyone use it's blueprints in free. Anyone can manufacture from it. Anyone can sell it to anyone. Freedom!
  • The license is CC BY 0. You crib it and make it for one's product and change it and am OK.
  • FABLIB project in itself prepared as an original kit and am selling it.
  • The argument about the development reaches in Japanese Raspberry PI Users Group ML mainly now. https://groups.google.com/forum/?fromgroups#!forum/japanese-raspberry-pi-users-group


* Than a function inexpensiveness * Than performance solidity * Than gaudiness plainness


  • It is for education, but It not for the training of the professional engineer.
  • I aim at what It can be handled without electric knowledge.
  • For education of the software, handling motivates a physical device.
  • Therefore I make a working board if I tie it

daily necessity

  • Incentive to be able to make daily necessity with the smallest trouble
  • The premise that is usable only for the experiment such as the breadboard eliminates it.
  • I enter problems of Raspbery Pi in itself and raise general completeness, if necessary.
    • The connection layout that attached great importance to heat radiation of Raspberry Pi
    • Power supply supply via the AC adapter
    • The deployment of the real-time clock

The inexpensiveness is justice

  • Price setting not to chip learning will
  • 5x10cm size. A deep-discount board manufacturer is available.
  • Amount of money that a child can purchase by oneself
  • Parts cost price is 33%.
  • Hardware sale without the unreasonableness is possible.
  • When I purchase it, and only a board prepares parts by oneself, it is cheaper.


* A buffer, the transistor array are implemented by DIP parts and an IC socket. When it was broken, I can change it by oneself. * Big voltage tolerance. I incorporate a buffer even if I do wrong wiring so that damage is inferior as possible to the main body of RaspberryPi.

For practical use

  • Reinforcement of the power supply
  • It receive supply of the electricity from Raspberry Pi, but RaspberryHabu can attach power supply circit and can usually do it with more stable movement with this
  • RTC
  • Battery backup is with it


  • I adopt a row in WiringPi.
  • I adopt a sauce-based signal. Logic 1-High-5V, 5V-High- logic 1.
  • The digital input of a wide voltage range. A direct signal can input 3.3V system, 5V system, 12V system of the car without an additional circuit.
  • The digital output with ability for big drive. It can drive high brightness LED and a relay without an additional circuit. In addition, ON/OFF of the 100V system is made by going through a relay.
  • An intuitive board layout. I place internal placement and connector sequence by intuition clearly.
  • I adopt an intelligible relay as a switch not a motor driver.


digital IN

  • 6 ports
  • Input range 2V - 15V

digital OUT

  • 8 ports
  • Output 5V

analog IN

  • 8 ports
  • 5VMax, 3.3VMax choice

power supply circuit

  • 5V supply
  • I separate interconnection / with Raspberry Pi, and setting is possible
  • Capaciter for stable power at only RaspberryPi power.


  • Battery backup

serial connector

  • It is for serial adapter connection
  • RaspberryPi bus direct connection type (201305xx version)
  • 5V level conversion type (201306xx version )
  • 5V/3.3V both connectable type (20130710~ )

Bus wiring for function cutting apart, relocation

and others

  • DC Jack for AC adapter connection
  • Jumper for VCC voltage setting
  • VCC monitor LED
  • DOUT bus monitor LED x 4
  • DOUT connection small size relay x 4
  • Switch-on board implementation for DIN experiments
  • Bus for ANALOG IN sensor power supply
  • Bus for DIN signal power supply
  • GND bus for DOUT load connection
  • Infrared LED array (a relay and exclusion use)



  • 1st release
  • The version that put a regulator on a power supply section
  • I sell it by events


connection diagram

assembling commentary


  • 2nd release
  • The version that put DCDC converter on a power supply section experimentally
  • I distribute it in study sessions


connection diagram

assembling commentary


  • 3rd release
  • I improve the parts layout of the DCDC converter
  • I change the screw hole position
  • It is easy to watch silk
  • Deletion of the I2C bus pulling up resistance
  • I change FTDI connector so that FTDI serial number adapter (5V) made in SparkFan is connected
  • I distribute it in study sessions


connection diagram

assembling commentary


  • 4th release
  • I improve the parts layout of the DCDC converter
  • Screw Hole fix.
  • Sylk fix.
  • fix Jumper pad of reconfiguration bus.
  • Add to FTDI Power connect/disconnect jumper.
  • enable to use 3.3V version FTDI adapter.


connection diagram

assembling commentary

Package constitution

Only as for RaspberryHabu board

300 yen( about USD3 )

RaspberryHabu First kit

  • Digital OUT x 8
  • LED for VCC monitors
  • LED x 4 for digital OUT monitors
  • Small relay x 1
  • power stable capacitar
  • Interface for FTDI adapters
  • 1,000 yen ( about USD10 )

RaspberryHabu Basic kit

  • In addition to a function of RaspberryHabu First
  • Digital IN x 6
  • SW x 1 for digital IN tests
  • Analog IN x 8
  • 2,000 yen ( about USD20 )

RaspberryHabu Full kit

  • In addition to a function of RaspberryHabu First
  • RTC
  • Backup battery for RTC
  • Power supply circuit
  • Temperature sensor for experiments, optical sensor, Ir LED
  • Small relay x 3
  • 4,500 yen ( about USD45 )

Attached file