Arduino Due Digital Output not 3.3 V

Using Arduino Installation & Troubleshooting
#1

Having trouble with my digital outputs on my Arduino Due.

They are supposed to output 3.3 V on each pin but im barely getting 1.8 V using two of them to active a relay switch that needs 3 V and 120 mA.

What is going on ?

#2

Did you forget to set the pins to OUTPUT?

#3

no it is set to output. i set pins 30 and 40 digital pins to output high to make sure the switch activates and im reading 1.8 V across the relay switch.

i plugged the relay in the 3.3 V pin and measured current and the switch turned on and it was drawing 100 mA

is the arduino due regulating the voltage on the digital pins or something? am I coding the pins wrong.

#4

MrWhite:
i plugged the relay in the 3.3 V pin and measured current and the switch turned on and it was drawing 100 mA

100mA is way more than it is safe to pull out of a digital pin. If it pulls that much current then you need to be using a transistor to switch it. You're lucky if you haven't smoked the pins already.

#5