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Keyboard Controller Board for HHKB pro2 - KiCad project

License: Other

KiCad Layout 100.00%

hhkb_controller's Introduction

Keyboard Controller Board for HHKB

This controller makes your HHKB fully programmable. You can use this with tmk_keyboard firmware. This will fit HHKB Pro2, Type-S and JP.

You can buy assembled board here. https://geekhack.org/index.php?topic=71517.0

dimension

141.50x36.00mm(1.6mm thick)

Update

2017/06/27: Rev.N Fix footprint of USB: add SMD pads for frame
2017/05/03: Rev.M Fix footprints of USB, LED, SKHH and DF14
2016/08/27: Rev.L Enlarge TH land of USB connector
2016/07/03: Rev.K Add reverse polarity protection and change foot print of D1
2016/01/28: Rev.J Add TMK logo and remove C13
2015/12/01: Rev.I Changed USB miniB to UX60SC-MB-5S8(through hole)
2015/12/01: Rev.H' Changed lands of USB miniB to recomended size
2015/07/xx: Rev.H
2015/03/xx: Rev.G
2014/12/xx: Rev.F
2014/11/xx: Rev.E
2014/09/19: Rev.D
2014/07/28: Rev.C

LICENSE

TBD

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hhkb_controller's Issues

Without Lipo it does not boot from USB

It should work without Lipo if it is powered form USB line.

RN-42 KiCAD library/module

Circuit Symbol and Footprint.

http://ww1.microchip.com/downloads/jp/DeviceDoc/jp558090.pdf
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en558330

Rev.B: Battery charger tune

Very slow charging on Rev.A.

charge current is tunable with R11
fast charge time is preferable in general
but when you want to use on phone or tablet with USB low charge current is needed(Optional)
Bluetooth should be used on phone, tablet or mobile gadget

HHKB JP PCB connector

PCB connector with 15 contacts.

Pro2 uses JST ZH 13 contacts. ZH series has no 15 pin product.
identify the product: OK
PCB footprint: OK

HHKB JP controller PCB

http://imgur.com/a/dkLO3

Hirose HRS DF14? DF14A-15P-1.25H

http://www.hirose.co.jp/catalogj_hp/j53800017.pdf
http://www.mouser.com/ds/2/185/e53800017-12550.pdf
http://www.mouser.com/ProductDetail/Hirose-Connector/DF14A-15P-125H55/

How to compatible with BLE 4.0

Hi, this is an awesome project.

But I have one question. The new Bluetooth tech will be more energy efficient than former version, does this controller support the Bluetooth 4.0?

Any discount and upgrade to Bluetooth 4.0?

Because bluetooth controller's cost made it close the bluetooth version of HHKB BT, have you ever considered lower the price for the controller for more sales?

By the way, any chance to upgrade the bluetooth module from 3.0 to 4.0? I believe the latest bluetooth can extend the running time for the keyboard.

Thanks

Remove or Change

Capacitor size: 10uF depens on avialability and price
Tactile switch need larger annular ring
debug pin pull-up resistors pads #10

Done:

pull up resistor R1
HHKB connector for Pro1
solder jumper
SMT Xtal
battery connector SMT component(JST PH 2) 2mm pitch
Battery connector SMT is better? TH is very wiggly when insert and remove it.
add mark to indicate direction of ISCP header

Cnaceled

add TH LED silk outiline to indicate polarity #11

Rev.B: Check component availablity

digikey.com
mouser.com *
Akihabara shops *

SMT HHKB Pro connector footprint

JST ZH 13 1.5mm pitch
http://www.jst-mfg.com/product/pdf/jpn/ZH.pdf

Power/Load switching

FET switching between USB power source and Battery.

FET breadboard test
research
MOS-FET O-ring

LUFA DFU Bootloader for HHKB controller(or Teensy)

I lost Atmel genuine bootloader for some reason during fiddling with ICSP with avrdude :) I don't know why for sure, I was just trying to read lock/fuse bits... but I must have been dumb.

So without bootloader I can't program it with USB line and very unusable. Atmel genuine bootloader for ATmega32U4 is not avaiable I had to build LUFA DFU bootloader and program it with AVRISPmkII via ICSP.

LUFA DFU bootloader is completely compatible for Atmel's, it rocks!

build

$ Bootloaders/DFU
$ edit makefile
$ make
$ sudo avrdude -p m32u4 -c avrispmkII  -Pusb -U flash:w:BootloaderDFU.hex

makefile for ATmega32U4(HHKB controller/Teensy)

--- makefile    2013-12-28 19:34:57.000000000 +0900
+++ makefile.atmega32u4 2013-12-30 13:34:03.000000000 +0900
@@ -11,10 +11,10 @@

 # Run "make help" for target help.

-MCU          = at90usb1287
+MCU          = atmega32u4
 ARCH         = AVR8
-BOARD        = USBKEY
-F_CPU        = 8000000
+BOARD        = TEENSY2
+F_CPU        = 16000000
 F_USB        = $(F_CPU)
 OPTIMIZATION = s
 TARGET       = BootloaderDFU
@@ -26,8 +26,8 @@
 # Flash size and bootloader section sizes of the target, in KB. These must
 # match the target's total FLASH size and the bootloader size set in the
 # device's fuses.
-FLASH_SIZE_KB         = 128
-BOOT_SECTION_SIZE_KB  = 8
+FLASH_SIZE_KB         = 32
+BOOT_SECTION_SIZE_KB  = 4

 # Bootloader address calculation formulas
 # Do not modify these macros, but rather modify the dependent values above.

PCB dimension

Rev.A PCB just wiggles when installed in the place.
Pro2 PCB also wiggles but a bit less than Rev.A. Type-S is very tight in the spot.
Wiggle is not problem so much, but we can make holes small to mitigate the wiggle.

DECISION: keep holes current size, we need that play of hole
If it fits too tight it loses room/play/allowance of changing alignment of USB connector. And we need play when install and uninstall PCB to fit USB connector to back window.

DECISION: USB connector to be moved left to 0.1-0.2mm.

module
replace Rev.A

research on the net.