The scenario
A hobbyist builds a Wi-Fi controlled robot car using an ESP32 dev board, a DRV8833 motor driver, and an HC-SR04 ultrasonic sensor for obstacle detection.
What is in this drawing
Read the decisions behind it.
01
Use a 2S Li-ion battery and 5V buck regulator to power the ESP32 and ultrasonic sensor reliably
02
Wire DRV8833 nSLEEP to 3.3V to keep the motor driver enabled
03
Connect ultrasonic trigger to GPIO13 and echo to GPIO14 for ranging
Reuse this netlist when assembling a small DC-motor robot with ESP32 Wi-Fi control and ultrasonic obstacle avoidance.
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