The Akafugu Blog

In our consulting business we have gotten more and more requests for NFC integration. Durig these integrations we often need to deal with access blocks for Mifare Classic cards.

The access bits are well described in the documentation but as it is a bit-format it takes time to decode it using pen and pencil. We have not been able to find any online tools to calculate it as well. To help us we made a small widget to calculate the bits, source code is free and available on GitHub.

Please notice that Akafugu does not take any responsibility that the access bits are correct. You should always double check the access bits as there is a real possibility that your card will be unaccessible if you set it wrong.


MIFARE Classic 1K Access Bits Calculator

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クーポンコード:2015OBON

AUG 21 2015

Every year in the late summer is the Obon Festival.

Akafugu will take two weeks off from Saturday August 22nd until Wednesday September 9th. During this time no orders will be shipped, but as a compensation, we are running a sale during that time.

Use coupon 2015OBON for 10% off, on all our products. Delivery will start on the September 10th.

For our Japanese customers some of our products are also available via Fulfilment by Amazon for next-day delivery at our Amazon Japan shop. During our break we will run the same discount there.

Related products:

Now available in the store: Nixie Modular Clock.

We started to sell this clock at Maker Faire Tokyo 2015 and it is now available in our online shop!

The Nixie Modular Clock! Akafugu’s Nixie Clock Redefined!

The Nixie Modular Clock is a fun to build stylish clock kit that uses old-fashioned neon Nixie tubes.

Features:

  • Comes as a kit complete with acrylic case
  • 4 beautiful 5 cm tall IN-14 Nixie tubes
  • High-precision DS3231M Real Time Clock for accurate timekeeping
  • Controlled by two buttons
  • Dedicated on-off button for alarm
  • Blue underlight for the tubes
  • ATMega328P microcontroller with Arduino bootloader
  • Open-source Arduino-based firmware, easy for anyone to understand and modify
  • Powered from a single 9V (or 12V) AC adapter
  • Controller booard can drive up to 6 digits
  • Modular design, more shields will come

Additional information here.

ニキシーもモジュラー時計(Nixie Modular Clock)は、オールドファッション風のネオンニキシー管を使った、 スタイリッシュな組立時計キットです。

ニキシー管は、かつてマルチメーターや電卓、軍装備品など、初期の電子機器用ディスプレイとして 主に用いられていました。ニキシー管は、金属製の網の形状をした1つの陽極と、一般には0~9の形を した10個の陰極を持ちます。数字以外のシンボルの形をしたニキシー管も一般的です。陰極と陽極の 間に約170~180ボルトの電圧をかけると、陰極がその特徴的な黄色がかったネオン色を発光します。

特徴:

  • アクリルケース付きのキット
  • IN-14ニキシー管×4個
  • ニキシー管の青いバックライト
  • 正確な時を刻む高精度DS3231Mリアルタイムクロック(RTC)
  • 二つのバタンによる操作
  • アラーム専用オン/オフスバタン
  • 誰でも簡単に理解し改良できるArduinoベースのオープンソースファームウェア
  • コントローラーボードは最大6桁までの処理が可能

Blog Archive

  • JULY 21 2015: Akafugu at Maker Faire Tokyo 2015
  • MAR 01 2015: New Product - VFD Modular Clock IV-18 SMT
  • FEB 10 2015: Visit to NXP Semiconductor Japan office
  • JAN 21 2015: Kit soldering class with Akafugu
  • DEC 19 2014: Gold plating for edge connectors
  • DEC 18 2014: Akafugu VFD Clock mentioned on Atmel blog
  • DEC 18 2014: New example program for 4x4x4 RGB LED Cube
  • DEC 15 2014: Updated Nixie schematics
  • DEC 05 2014: Akafugu Featured in Article about Maker Faire Tokyo
  • DEC 04 2014: Soldering class at Tokyo Hacker Space
  • NOV 27 2014: Black Friday - Cyber Monday Sale
  • NOV 27 2014: New Product - LED Matrix 3x3
  • NOV 26 2014: Maker Faire Tokyo 2014 Pictures
  • OCT 09 2014: Updated Product - FTDI Serial Adapter
  • SEPT 25 2014: Better precision with PCB stand-offs.
  • SEPT 24 2014: Arduino Packages Updated to 1.0.6
  • MAY 21 2014: Explaining CON/con parts for MDC Luna machines
  • MAY 01 2014: New Product - VFD Moduar Clock IV-4 6-digit
  • MAY 01 2014: Golden Week Vacation and Sale
  • APR 28 2014: Updated Product - The Akafugu Nixie Clock 3.0
  • APR 28 2014: SO, SOP, TSOP, which is which?
  • APR 22 2014: Coming Soon - Akafugu Nixie Clock version 3
  • APR 10 2014: Xmegaduino beta5 released!
  • APR 07 2014: DIY tray for MDC Pick and Place machine
  • JAN 05 2014: New Product - Diet Nixie
  • DEC 09 2013: New Product - VFD Modular Clock IV-18
  • NOV 24 2013: New products from Freetronics
  • NOV 06 2013: To customers who bought VFD Modular Clock at Maker Faire Tokyo
  • OCT 23 2013: Halloween Spooky Eyes Decoration
  • SEPT 12 2013: VFDDeluxe Firmware v1.1 Released
  • AUG 20 2013: Vetinari Clock Rock
  • AUG 10 2013: Obon Sale
  • JULY 28 2013: New Product - Cmoy Headphone Amplifier Kit
  • JULY 18 2013: New Product - RGB LED Cube
  • JULY 08 2013: Product updates - VFD Modular Clock and The Akafugu Nixie Clock
  • JULY 01 2013: Visit to Fab Cafe in Shibuya
  • JUNE 04 2013: Alternate firmware for LED Candle
  • MAY 30 2013: VFD Modular Clock Raspberry PI Edition Sneak Preview
  • MAY 01 2013: New Product - IV-22 6-digit VFD Modular Clock Shield
  • APR 17 2013: Akafugu products on display in Osaka
  • APR 16 2013: Raspberry Pi Reference Sheet from Surrey Hampshire Hackspace
  • APR 02 2013: New Product - Vetinari Clock
  • MAR 14 2013: New Product - Four Letter Word Generator add-on
  • FEB 27 2013: Diet Nixie Sneak Preview
  • FEB 07 2013: Reprogramming the VFD Modular Clock
  • FEB 04 2013: VFD Soldering Class Pictures
  • JAN 31 2013: Arduino Spectrum Analyzer
  • JAN 30 2013: Nixie Clock Firmware Issue Discovered
  • JAN 30 2013: Reprogramming the Akafugu Nixie Clock and Simpleclock
  • JAN 21 2013: Nixie clock back in stock
  • JAN 20 2013: Nixie and VFD clock classes at Tokyo Hacker Space
  • JAN 05 2013: Nixie Clock Out of Stock
  • JAN 04 2013: VFD Modular Clock IV-4/IV-17 and IV-6 Shield Pinouts
  • JAN 02 2013: Awesome VFD Modular Clock Case
  • DEC 21 2012: Christmas and New Year Break and Sale
  • DEC 10 2012: New firmware for Simpleclock
  • DEC 08 2012: VFD Modular Clock kit contents update
  • DEC 05 2012: Thank you everyone that visited us at Maker Faire Tokyo 2012
  • DEC 05 2012: Using TWILCD with Adafruit RGB displays
  • DEC 04 2012: Interesting blog - Using an Arduino to program ATTiny chips
  • NOV 28 2012: Preparing for Maker Faire
  • NOV 21 2012: Black Friday - Cyber Monday sale
  • NOV 15 2012: Testing serial devices with Akafuino L
  • NOV 13 2012: New Version 1.0.2 of Arduino Released
  • OCT 29 2012: Nixie Clock enclosure
  • OCT 28 2012: Halloween Sale
  • OCT 17 2012: Teensy 3.0 support for our TWI/I2C products
  • OCT 13 2012: Our shop is now available in Japanese
  • OCT 08 2012: New Nixie class at Tokyo Hacker Space
  • OCT 06 2012: Akafugu at Maker Faire Tokyo 2012
  • OCT 05 2012: Two new schematics added
  • OCT 01 2012: VFD Modular Clock - Problem Fix Advisory and Firmware Update
  • SEPT 30 2012: Akafuino X schematic
  • SEPT 28 2012: Soldering classes at Tokyo Hacker Space
  • SEPT 25 2012: QR-code on invoices
  • SEPT 24 2012: Nixie Clock schematics and firmware
  • SEPT 21 2012: New Product - The Akafugu Nixie Clock
  • SEPT 15 2012: New Product - ProjectBox for Arduino
  • SEPT 14 2012: Suntory Espressoda - review
  • SEPT 09 2012: Sneak preview
  • SEPT 08 2012: Back in stock! VFD Modular Clock - Enclosure - IV-17/IV-4 and TWI 7-seg Display compact stand
  • SEPT 07 2012: From the mail...
  • SEPT 06 2012: VFD Modular Clock Update - Now shipping with IV-4 tubes
  • SEPT 04 2012: TWILCD together with OLED
  • SEPT 03 2012: MENWIZ together with TWILCD
  • AUG 31 2012: Making a Pick & place machine, part 2
  • AUG 22 2012: Tokyo HackerSpace Moving In Party
  • AUG 14 2012: Back in stock! TWILCD and Akafuino X
  • AUG 10 2012: New Product - TWIDisplay 8-digit LCD
  • AUG 09 2012: New Reference Files for VFD Modular Clock, part 2
  • AUG 08 2012: New Reference Files for VFD Modular Clock
  • JULY 20 2012: Summer break
  • JULY 06 2012: Making a Pick & place machine, part 1
  • JULY 05 2012: Microcontroller Reference Sheet SMD v1.0
  • JUNE 27 2012: New Product - Akafuino L
  • JUNE 16 2012: New Product Reviews
  • JUNE 13 2012: USB and serial ports on Arduino Leonardo
  • MAY 23 2012: New Product - DS3231M Real Time Clock Breakout
  • MAY 22 2012: New Product - Simpleclock
  • APR 24 2012: New Products
  • APR 19 2012: 4x40 display and big numbers
  • APR 16 2012: TWIDisplay .net Micro Library
  • APR 09 2012: Xmegaduino beta4 released!
  • APR 09 2012: Avr-gcc 4.5.1, Avr-libc 1.7.1 and delay problems
  • APR 06 2012: New product - TWILCD 40x2/40x4/RGB edition
  • MAR 22 2012: New Product - Smoke Black Acrylic Stand for TWIDisplay
  • MAR 16 2012: New Microchip 25AA02E48 arduino library
  • MAR 15 2012: ATXMega Reference Sheet v1.0
  • MAR 05 2012: TWILCD Compatibility
  • MAR 02 2012: Electronics Reference Sheet v1.0
  • FEB 29 2012: Four Letter Word Generator PART 2 - EEPROM Programmer
  • FEB 13 2012: VFD Modular Clock Review
  • FEB 08 2012: Four Letter Word Generator
  • FEB 02 2012: New version of the Microcontroller Reference Sheet with Arduino-tiny pinouts
  • JAN 20 2012: Xmega Overclocking
  • JAN 10 2012: New Product - Shift Register Breakout Board
  • JAN 05 2012: Now in stock - Akafuino X
  • JAN 02 2012: VFD Clock Updates
  • DEC 22 2011: Opening Hours During the Holiday
  • DEC 20 2011: New Product - TWILCD
  • DEC 17 2011: Now In Stock - Serial and ISP Breadboard Adapter
  • DEC 03 2011: New Products
  • DEC 01 2011: Arduino 1.0 is out
  • NOV 25 2011: Using the Wire library with the Xmegaduino Arduino IDE
  • NOV 20 2011: VFD Modular Clock
  • NOV 15 2011: Meet the Akafuino X
  • OCT 31 2011: Eagle 3D models with EagleUp
  • OCT 01 2011: Microcontroller reference sheet
  • SEPT 28 2011: uA-meter Thermometer