output voltage of pins

[dinesh999lama]

what is the output current and voltage of odroid c2 pins?

[rooted]

Here is a diagram

[rooted]

Each GPIO pins can draw/sink 4mA and maximum I/O voltage is 3.3V.
3.3V power rail can draw up to 300mA.
5.0V power rail can draw up to 700mA.

Which devices will be connected to the 40pin GPIO header?

[dinesh999lama]

Right now i'm using this:https://www.mpja.com/Stepper-and-DC-Mot ... 4652%20MP/ dc motor driver to co0ntrol the two dc motors for robot wheel. But latter this: https://himalayansolution.com/product/7 ... ver-module one will be used.

[odroid]

You need an external PSU for the driver board and motors.
And you probably need a couple of level shifters for 3.3V to 5V(TTL) level translation.

Are you connecting a DC motor with PWM control? or stepper?

[MykelDel]

Dear Admin, I'm surprised with some circuits where a led is directly drived with the GPIO output through a resistance of 220 Ohms, that means a current of 16mA. How is that possible when the max current is 3mA? Does it means that I can drive directly an optocoupler array with the GPIO outputs without interface? Thank you in advance for any information.

[odroid]

According to S905 datasheet page 38, maximum current is around 3~6mA.
https://wiki.odroid.com/odroid-c2/hardw ... d_drawings

Small chip LEDs on the ODROID board could be very bright enough even with 1mA current.
You might need to check your LED datasheet.