Gnublin

Gnublin:
The Gnublin board is a small form factor PCB with an embedded Linux  on it. It can be bought on embedded-projects.net.

Picture of the Gnublin board:

gnublin

Gnublin board with a Wifi dongle and battery:

access_point

Gnublin board connected to a STK-500:

alles_port

7-Segment display attached to the Gnublin board:

platine_port

Gnublin board with a DCF-77 reciefer:

 

dcf

DCF-77 high signal:

 

dcf_high

DCF-77 low signal:

dcf_low

Kernel configuration:

linux_kernel_configuration

Schematics of the soundcard:

schaltplan

Soundcard PCB design:

 

layout

Etched PCB:

platine_gebohrt_bottom

Drill the wholes:

platine_bohren

Manufactured PCB:

platine_gebohrt_top

Fully assembled PCB:

platine

Theory of the signal:

 

pwm

Signal on an oscilloscope (PWM):

pwm_500hz

Signal on an oscilloscope (PWM):

pwm_sinus

Setup of the soundcard:

platine_pwm

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