Atmosphere Circuit Diagram

This document outlines the circuit design for the Atmosphere project, detailing the interconnection of key electronic components.

Component Overview

The circuit features the following primary components:

U10 (SCD41-D-R2): A sensor responsible for detecting atmospheric conditions. It interfaces with the microcontroller via I2C communication (SCL, SDA) and requires power (VDD, GND) and a reset signal (RES).
U7 (ESP32-WROOM-32): A microcontroller unit that processes sensor data and controls other components. It communicates with the SCD41 sensor and the OLED display. It has various pins for input/output, including GPIOs, SPI interfaces (SCS/CMD, SCK/CLK, SDI/SD1, SDO/SDO), and power (3.3V, GND).
U9 (OLED_SSD1309 128X64_SPI): A 128x64 pixel SPI OLED display used for outputting information. It connects to the ESP32 via SPI (DC, CS, SCL, SDA) and requires power (VCC, GND).
U6 (TLV61070ADBV): A power management IC, likely a boost converter, used in conjunction with a battery. It takes battery input (B-, B+) and provides regulated output (VIN, SW, VOUT).
BT2 (Battery_Cell): Represents the battery source for the device.

Circuit Connections

The diagram illustrates the following key connections:

The SCD41 sensor (U10) is connected to the ESP32 (U7) for I2C communication (SCL and SDA pins).
The ESP32 (U7) is also connected to the OLED display (U9) via an SPI interface.
Power management (U6) is connected to the battery (BT2) and supplies power to various parts of the circuit, including the ESP32 and potentially the sensor and display.
Specific GPIO pins on the ESP32 are utilized for sensor and display communication, indicated by pin numbers and signal names. For instance, sensor inputs like SENSOR_VN and SENSOR_VP are connected to specific ESP32 GPIOs.
The USB-C 4056 module is part of the power management system, likely handling charging and power input.

Technical Details

File Information:

Sheet: /
File Name: atmosphere.kicad_sch
Title: Atmosphere Circuit Diagram
Size: A4
Date: 21.07.2025
Revision: Id: 1/1
Software: KiCad E.D.A. 9.0.3

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Component Overview

Circuit Connections

Technical Details

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