Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a Raspberry Pi Pico W microcontroller, a BMP280 sensor, a 16x2 I2C LCD, a Photocell (LDR), and a Resistor. The circuit is designed to interface these components for various sensing and display purposes.

Component List

Raspberry Pi Pico W

• Description: A low-cost, high-performance microcontroller board with flexible digital interfaces.
• Pins: VBUS, VSYS, GP16, GP17, GND, GP18, GP19, GP20, GP21, GP22, RUN, GP26, GP27, GP28, ADC_VREF, 3V3 OUT, 3V3_EN, GP0, GP1, GP2, GP3, GP4, GP5, GP6, GP7, GP15, GP14, GP13, GP12, GP11, GP10, GP9, GP8

BMP280

• Description: A barometric pressure sensor that can measure atmospheric pressure and temperature.
• Pins: SDO, CSB, SDA, SCL, GND, VCC

16x2 I2C LCD

• Description: A 16x2 character LCD display with I2C interface.
• Pins: GND, VCC, SDA, SCL

Photocell (LDR)

• Description: A light-dependent resistor that changes its resistance based on the light intensity.
• Pins: pin 0, pin 1

Resistor

• Description: A 10k Ohm resistor used to limit current or divide voltage.
• Pins: pin1, pin2
• Properties:
  • Resistance: 10,000 Ohms

Wiring Details

Raspberry Pi Pico W

• VSYS is connected to VCC of the 16x2 I2C LCD.
• GND is connected to pin2 of the Resistor.
• GP28 is connected to pin 1 of the Photocell (LDR) and pin1 of the Resistor.
• 3V3 OUT is connected to VCC of the BMP280 and pin 0 of the Photocell (LDR).
• GND is connected to GND of the BMP280 and GND of the 16x2 I2C LCD.
• GP2 is connected to SDA of the 16x2 I2C LCD.
• GP3 is connected to SCL of the 16x2 I2C LCD.
• GP4 is connected to SDA of the BMP280.
• GP5 is connected to SCL of the BMP280.

BMP280

• VCC is connected to 3V3 OUT of the Raspberry Pi Pico W.
• GND is connected to GND of the Raspberry Pi Pico W.
• SDA is connected to GP4 of the Raspberry Pi Pico W.
• SCL is connected to GP5 of the Raspberry Pi Pico W.

16x2 I2C LCD

• VCC is connected to VSYS of the Raspberry Pi Pico W.
• GND is connected to GND of the Raspberry Pi Pico W.
• SDA is connected to GP2 of the Raspberry Pi Pico W.
• SCL is connected to GP3 of the Raspberry Pi Pico W.

Photocell (LDR)

• pin 0 is connected to 3V3 OUT of the Raspberry Pi Pico W.
• pin 1 is connected to GP28 of the Raspberry Pi Pico W and pin1 of the Resistor.

Resistor

• pin1 is connected to pin 1 of the Photocell (LDR) and GP28 of the Raspberry Pi Pico W.
• pin2 is connected to GND of the Raspberry Pi Pico W.

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code section. Each component is described in detail, and the wiring connections are clearly outlined to ensure proper assembly and functionality.