Hi I am essentially replicating this project where an Air Swimmer flying shark baloon can be controlled with an Arduino by soldering wires to the push buttons in the remote control and using transistors to control them with a signal from an Arduino pin instead: https://shallowsky.com/blog/hardware…

Trouble overiding a push switch with a transistor

DrDiettrich August 11, 2025, 10:56pm 6

Yes. It won't work if the positive supply (Vcc) is not the same for the circuit and the Arduino.

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