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dif pressure meter

ardiloot

ESP32 based differential pressure (and air flow) meter. Handheld, battery powered DIY device for measuring small pressure differences (Sensirion SDP810-500Pa).

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Main components

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Part NumberDescription
CH340CUSB serial converter, crystal-less, UART, SOIC-16
TP40561A Standalone Linear Li-ion/LiPo single-cell battery charger, 4.2V ±1% charge voltage, VCC = 4.0..8.0V, SOIC-8 (SOP-8)
RT9080-33GJ5
ESP32-WROOM-EESP32-WROOM-32E integrates ESP32-D0WD-V3, with higher stability and safety performance.
LCD_ST7735S_1.8

dif pressure meter schematic

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dif pressure meter board layout

dif pressure meter PCB render

Top PCB
Bottom PCB