LM2596 buck converter (adjustable) with ESP32

Supply 4.5-40 V Bus GPIO

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
IN+	Not wired to the ESP32	—	Input 4.5 to 40 V
IN-	Ground	GND	Input ground, same as OUT-
OUT+	Not wired to the ESP32	—	Adjustable 1.25 to 35 V. Set 5 V with the screw BEFORE wiring it to VIN
OUT-	Ground	GND	To the ESP32 GND

Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.

Texas Instruments LM2596 datasheet, Input up to 40 V; 3 A output; adjustable 1.23 V reference

Part data: CC BY 4.0, free to reuse with credit to BoardPilot.