Unable to use output to switch on relay

Official Hardware Classic Yún
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First measure up port 6 output voltage.

Arduino Yun 5v pin doesnt give me 5v, all the digital output will be suffer as well

http://forum.arduino.cc/index.php?topic=209836.msg1541065#msg1541065

The standard MOSFET and only turns on when Vgs=10V or higher.
For Arduino Yun, which only outputs 4.4V, you will need a logic-level MOSFET. For this type of MOSFET, Vgs=4.4V is enough to turn it on.

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FQP27P06. 60V P-Channel MOSFET
RDS(on) Static Drain-Source
On-Resistance VGS = -10 V, ID = -13.5 A -- 0.055 0.07 ?

You need N-channel logic-level power MOSFET. 3.3 V type is fine but 5.0 v should be ok.

sonnyyu:
Why stop at 3.3 V, Vishay has a lot of them for even as low as 1.2 v.

Special applications
2.5 V rated on-resistance (255)
1.5 V rated on-resistance (52)
1.2 V rated on-resistance (19)

1.2 V rated on-resistance | MOSFETs | Vishay

1.5 V rated on-resistance | MOSFETs | Vishay

2.5 V rated on-resistance | MOSFETs | Vishay

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Most of them are transistors but MOSFET, You might have better luck post same question at General Electronics Forum.

http://forum.arduino.cc/index.php?board=5.0

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