How to use your Macbook iSight/Facetime camera in a VirtualBox machine

$ VBoxManage list webcams
Video Input Devices: 1
.1 “FaceTime HD-Kamera”
CC2…V1
$ VBoxManage controlvm “windows” webcam list
$ VBoxManage list vms
“windows” {9e..98}
“freebsd” {95..31}
$ VBoxManage controlvm “windows” webcam attach .1
$ VBoxManage controlvm “windows” webcam list
.1
$ VBoxManage controlvm “windows” webcam detach .1

raspberry pi b+ overclocking options

SoC (Broadcom BCM2835 ARMv6) thermal range is up to +85 °C.

Orginal /boot/config.txt

disable_commandline_tags=1
gpu_mem=32
device_tree=rpi.dtb
device_tree_address=0x100
kernel=uboot.img

My additional options (stable system):

arm_freq=900
arm_freq_min=700
gpu_freq=250
gpu_freq_min=250
core_freq=450
core_freq_min=250
sdram_freq=500
sdram_freq_min=400
over_voltage=0
over_voltage_min=0
initial_turbo=15
temp_limit=75

source