ESP32 Forum

Hi

I am trying to connect a operate a electrical valve with a esp32
The circuit of the valve is as follows.
https://www.sensoware.com/docs/electric ... ons/sa501/

In this the green has to be supplied with +12 V trigger. So I will connect the +5V output using a transistor.
My question is the feedback output on the blue and yellow has +12V DC.
How should I connect to the esp32 pins which can only accept +5V DC right.

sksanthosh wrote: ↑

Sat Jun 15, 2024 2:10 pm

In this the green has to be supplied with +12 V trigger. So I will connect the +5V output using a transistor.

Since you need to switch the positive +12V, you'll need a 'high-side switch'; one transistor is probably not going to cut it.

My question is the feedback output on the blue and yellow has +12V DC.
How should I connect to the esp32 pins which can only accept +5V DC right.

The ESP's pins accept 3.3V input max. The easiest way would be to use two resistors as a voltage divider. Something in the range of 10k-100kOhm seems reasonable (e.g. 24k + 9.1k, or 62k + 22k).