Hi guys, I have found in the old forum a guy that had the same problem as mine: control a device that is 0-10V controlled with the 0-5V from the Arduino. One of the users answered this solution, but was not sure about the resistors values : Assuming my device needs 200mA and using a 2n2222 tran…

Variable 0-10V from 0-5V

polymorph May 4, 2018, 4:07pm 9

For a 2N2222, or any older transistor when used as a switch, the base current should be about 1/10th of the collector current.

You'll find it on the datasheets.

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