I am using similar relay board as I mentioned in the first post. Now I am thinking of a couple of things. 1.I have not grounded 12V (DC adapter) and from 5 V (Buck converter). Do I need to ground both of them ? 2. I have put everything into a box. May be there is no enough ventilation and it get ove...

Thank you ok-home & djixon for your support.

Assume I take the route with relays, this is the relay board that I am using.


I am assuming the components that ok-home suggested is inbuilt into this circuit.
Kindly correct otherwise.

Thank you for your suggestions. The most of dev boards have USB powering source which is 5V. But, on those boards there is 5V->3.3V converter because ESP32 uses 3.3V voltage. Kindly guide me here, my understanding is VIN pin on ESP32 accepts 5V and still goes through the voltage regulator. Isnt it t...

Hello, Please find the full connection diagram ESP32_Block_Diagram.png . The relay is a normal 2 channel relay board is what I have used. Link is provided for reference : https://robu.in/product/2-channel-isolated-5v-10a-relay-module-opto-coupler-arduino-pic-avr-dsp-arm/?gclid=CjwKCAjw1t2pBhAFEiwA_-...

Hello All, I am a hobbyist and trying to making a gardening system with ESP32 DevKit. I have connected 12V DC adapter to LM2596 to convert it to a 5V and then it is connected to the VIN of the ESP32 Dev Kit. It works for sometime ( May be couple of hours)but not more than 3 or 4 hours. It got fried ...