15A STM32 XT30 DC Bidirectional Power Meter 12V 24V Li-ion Lifepo4 Lithium Battery Charger/Discharger Digital Voltmeter Ammeter

STM32G030F6P6 Bi-Directional Current Meter1. Application Scenarios:This device is designed for monitoring the input/output voltage, bi-directional current, and output power of various equipment, including power supplies, batteries, solar panels, DC generators, and more.2. Product Overview:Utilizes the STM32G030F6P6 microcontroller as the main controller.Employs the MCU's built-in 12-bit ADC for precise voltage and current sampling.Measures output voltage via a resistive voltage divider.Measures output current bi-directionally by amplifying the voltage drop across a low-side 2mΩ shunt resistor using the INA199 current sense amplifier.Features a stable power supply:The SGM2203-3.3YK3LG/TR step-down converter provides 3.3V for the display.The MCU is powered by a highly precise 3.0V supply, derived from the REF3030 (0.2% tolerance voltage reference) via a secondary step-down circuit, outperforming the CM3610-V1.High voltage tolerance: Up to 40V.Display: Features a bright and clear 0.96-inch IPS screen for information display, communicating with the MCU via SPI interface.User Interface: Includes a dedicated screen rotation button.3. Specifications:ParameterValue / DescriptionInput Voltage Range7V ~ 36V DCMeasured Current Range0A ~ ±15A (Bi-directional)Voltage Resolution0.0125VCurrent Resolution0.01-0.05A Buyers require high precision Please do not purchasePCB Dimensions5.56 x 15.4 x 7mm (L x W x H)PCB Design2-Layer Board, Single-Side SMT (Easy Soldering)ProtectionReverse Polarity Protection (RPP) via Unidirectional TVS Diode + PTC Resettable Fuse4. Usage Instructions:Plug-and-Play: Simply connect your power source to the XT30 Male connector (Input) and your load to the XT30 Female connector (Output).Screen Rotation: To change the orientation of the displayed information, single press the screen rotation button.