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STM32 DC electronic load

Overview

Current measurement: Because the offset voltage of LM328 is too large for ordinary op amps and the accuracy is not high, it can barely be used. In order to improve the accuracy, a sampling resistor of 20mR is used with a maximum overcurrent of 7A.

For the sake of aesthetics, the model GT610 graphics card radiator is selected. The heat dissipation power is within 30W. The maximum power dissipation of the whole machine is determined by the heat dissipation system.

The DAC control circuit is reserved, and the STM32F051C8T6 microcontroller can be used. The specific functions are to be developed by qualified personnel.

DC5.0/terminal block/TYPE-C three interface inputs basically meet daily use, with input reverse connection protection, independent battery power supply, super large voltage range input (0--66V)

The display uses a 0.96-inch OLED 4-pin IIC interface module

Reserve a wealth of interface peripherals and only use the Arduino framework to develop some basic functions.

Maximum input voltage: 50V Current: 7A Power: 40W

Design Files

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Update:2025-05-12 17:48:27

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