tmk / hhkb_controller Goto Github PK

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

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

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

Replace Bluegiga WT12 with Roving Networks RN-42.

RN-42:
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en558330

• module
• replace Rev.A

FET switching between USB power source and Battery.

• FET breadboard test
• research
• MOS-FET O-ring

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.

• digikey.com
• mouser.com *
• Akihabara shops *

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.

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?

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/

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

Some configurations need better solder jumper to work with easily.

• research on the net.

Without Lipo it does not boot from USB

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

Circuit Symbol and Footprint.

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