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  • Did you check how much current the valve requires? Are you sure your power supply can deliver that much current? Commented Jun 20, 2024 at 18:49
  • @EdgarBonet the current required for the valve is 500mA and the power supply is 2A so no problem. Additionally, the valve works correctly when I manually connect it between VCC and GND. So I don't think that's the problem 🥲. Thanks anyway for this remark! Commented Jun 20, 2024 at 19:00
  • use a transistor to drive the solenoid ... many examples on the internet Commented Jun 20, 2024 at 19:20
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    @jsotola this valve being a bistable valve, I have to reverse the polarities in order to open/close it. So I have to make an H-bridge with transistors? Isn’t that precisely the work of the l9110? I will try as soon as I have enough transistors at my disposal. Thank you for your idea! Commented Jun 20, 2024 at 20:01
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    Please measure voltage and current of the valve when you apply control signals for all three situations, off, open, close, and edit your question to add the results. BTW; what is the reference to Arduino? Perhaps it would be better to ask this at SE/EE? Commented Jun 21, 2024 at 6:04