Hey,
I have ordered a 5V 10A adapter and a 4M 30 leds/m WS2801 strip, and I am doing some initial research.
When looking at diagrams for a RPi with no video caption, it's:
Atm my OpenELEC RPi 2 system is connected to my TV's 900 mA USB for power, so it starts automatically and switches to the RPi which I prefer. If I follow the above diagram when I receive the gear, then the RPi gets powered through the GPIO.
However, can't I just ignore the +5V and GND to the RPi GPIO? Then just connect the MOSI and SCLK to the strip, and the led strips GND and +5V to the DC adapter? Or do the led GND need to be connected to RPi also?
Thanks in advance