GPIO output change state to 0 alone

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GPIO output change state to 0 alone

Unread post by Fea » Sun Jun 09, 2019 7:17 pm


I have an Odroid XU4 on which I pass a transistor to different GPIO to control relays. I placed a 330 Ohm resistor between my GPIO and the base of my transistor.

however, when I activate or leave one of them, the one who is active, is put on hold. Could it be possible that the current is insufficient?

How can I overcome this problem? can be by adding a resistance between the base and the ground?

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Re: GPIO output change state to 0 alone

Unread post by odroid » Mon Jun 10, 2019 9:47 am

XU4 GPIO can draw/sink up to 5mA which must be enough to control generic MOS transistors.

Which transistor did you use?
Is it working with 1.8Volt GPIO?
Which relay do you use?

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