keyboard/hhkb/doc/Bluetooth.txt

   1 HHKB Bluetooth mod
   2 ==================
   3 See this article:
   4 http://geekhack.org/showwiki.php?title=Island:20851
   5
   6
   7
   8 Power consume
   9 =============
  10 Switch board
  11 ------------
  12 5V
  13 18mA        full scan/no power control
  14 16.5mA      full scan with power control of POWER_ON/POWER_OFF in matrix.c
  15 3.5-6mA     60ms watchdog timer sleep iwrap/main.c
  16
  17 - the longer sleep time the less power is consumed.
  18 - power control of swtich board must be needed.
  19 FET switch may be better, though 18mA is with in port sink current limit. In current design switch board ground is connected to  PB5 pin and power it on by making the pin low.
  20
  21 Blueguiga WT12
  22 --------------
  23 3.3V
  24 -42mA       startup/searching/connecting
  25 19-23mA     connected
  26 4mA -8mA    not connected
  27
  28 iWRAP sleep command may not work. to be looked into.
  29
  30 Power Over all
  31 --------------
  32 5V
  33 -65mA       startup
  34 17-24mA     idle/not connected
  35 -42mA       connecting
  36 32-37mA     idle/connecting(with sleep)
  37 50-53mA     typing/connecting(no sleep)
  38
  39 2013/06/07