Connections for Arduino UNO R3 and ESP32

[jim-p]

See your other two topic on the same subject:

ESP32 ultrasonic sensor wiring on breadboard – is this correct?

Hello, I am currently working on a smart parking system project. The idea is to use an ESP32 together with an ultrasonic sensor to detect whether a parking space is occupied, and then send the data to a web application. At the moment, I am trying to build and test a single unit using an ESP32 (without Arduino Uno). I am powering the ESP32 through USB, and then distributing power to the breadboard by connecting 3.3V (3V3) and GND from the ESP32 to the power rails. The ultrasonic sensor is conn…

and this one:

The safe and proper power supply design for a system consisting of an Arduino Uno, an ultrasonic sensor, and an ESP32 using a 12V source

Hi, I have a question about powering my project. I want to use a 12V adapter to power the following setup: Arduino Uno RCWL-1655 ultrasonic sensor (connected directly to the Arduino) ESP32 (powered separately through the breadboard) My idea is: supply 12V to the Arduino Uno (via VIN or barrel jack) power the ultrasonic sensor directly from the Arduino (5V and GND) power the ESP32 from the Arduino’s 5V (or VIN) through the breadboard I am not sure if this is safe and stable. My questio…