蓝猫淘气

Air pressure detection module based on LPS25HBTR

Overview

The project mainly includes the following parts:

Main chip circuit
Input voltage conversion circuit
MOS level conversion circuit
I2C/SPI mode switching circuit
I2C address change circuit

Precautions:

The recommended power supply voltage range of the chip is 1.7-3.6 V, and the maximum cannot exceed 4.8V. This design converts VIN to 3.3V as the power supply.
Pay attention to the high and low levels of the signal. The maximum voltage of each signal pin of the chip is VDD_IO+0.3. In this circuit, VDD_IO is 3.3V, that is, the maximum input of each signal pin is 3.6V. The high level of a device like Arduino is 5V, which may damage the chip. Need Convert the input 5V high level to 3.3V high level.
See the text in the schematic diagram for specific comments.

Design Files

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Update:2025-06-22 20:55:44

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