'Masu' is a japanese wooden cubic box which was used to measure correct volume of rice,soy sauce and so on in japan for 1300 years.
Historically,it was very important because rice was used as tax and salary,as salt did in ancient Greece.First mention about Masu can be found in the statute books written in early AC700,and it was used until 1964.

One day i found old Masu at flea market in Tokyo,which was built just after WW2 and used to measure liquid,maybe soy sauce or oil.
I decided to build a timer using this Masu and nixie tubes,both abandoned technologies.

it was my first touch for PCB CAD(i used EAGLE http://www.cadsoftusa.com) but finally i could design board schematics.
i ordered Olimex(http://www.olimex.com/) in Bulgaria to build my PCB.They did their job perfectlly.

i burned Arduino firmware to ATmega168 as controller.
All power is supplied via IEEE cable and no additional DC adapter is required.so that i can use it at coffee shop with my MacBook.

After soldering items,it fits to the inner space of Masu.
Drilling holes for nixie tubes and neon lamp at the bottom of Masu and upside down.Then it's done!
There are 3 switches and 1 volume.

switch1: power on/off
switch2: change mode between usual timer and pomodoro timer(repeat 5mins rest&25min work)
switch3: pause on/off
volume: adjust timer and rest span of pomodoro

i will reduce switch from 3 to 2 in next time.but as prototype,i'm totally satisfied.

<p>nice build, reminds me of a Nixie clock. :-)</p>
sorry,please refer here about Pomodoro Technique <br> <br>http://en.wikipedia.org/wiki/Pomodoro_Technique <br> <br>There are five basic steps to implementing the technique: <br>1.decide on the task to be done <br>2.set the pomodoro (timer) to 25 minutes <br>3.work on the task until the timer rings; record with an x <br>4.take a short break (5 minutes) <br>5.every four &quot;pomodoros&quot; take a longer break (15&acirc;€“20 minutes)
Aha! Learned something new AGAIN! Thanks, Hisashin.
Lovely done, Hisashin, AND learned something new; masu! <br> <br>I have to agree with stringstretcher, I do not understand your use of the word pomodoro (which would be a type of tomatoe here)
thanks,please refer here about pomodoro <br>http://en.wikipedia.org/wiki/Pomodoro_Technique
nice project and instructable... but I'm lost: tomatoe?<br>
Awesome! I want one!
Nixie tubes make everything look so great.

About This Instructable



Bio: President of Toriningen Inc. in Tokyo
More by hisashin:電マ式バター製造機 (Massager Butter Maker) How to use Genome code to design はじめての自作スマートロック 
Add instructable to: