user77279: How could I estimate the max number of switches that I could connect to an Arduino Uno?
I am questioning if Arduino has enough power to simultaneously operate an X number of switches with no issues.
I am using an external power adapter of 12 volt/2 amps (barrel).
Here is the hardware: https://m.hellasdigital.gr/el/products/tank-pool-water-level-liquid-sensor-float-switch

user77279: thank you a lot about your input it was very useful.
My source of issues was a faulty sensor. After I changed it things are smooth now.
I separated the power cables from the signal as well that is super important.
Thank you a lot about the valuable input!

77279: <p>How could I estimate the max number of switches that I could connect to an Arduino Uno?</p>
<p>I am questioning if Arduino has enough power to simultaneously operate an X number of switches with no issues.</p>
<p>I am using an external power adapter of 12 volt/2 amps (barrel).</p>
<p>Here is the hardware: <a href="https://m.hellasdigital.gr/el/products/tank-pool-water-level-liquid-sensor-float-switch" rel="nofollow noreferrer">https://m.hellasdigital.gr/el/products/tank-pool-water-level-liquid-sensor-float-switch</a></p>
 77279: <p>thank you a lot about your input it was very useful.
My source of issues was a faulty sensor. After I changed it things are smooth now.
I separated the power cables from the signal as well that is super important.</p>
<p>Thank you a lot about the valuable input!</p>
