Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates a camera module (OV7725), a buzzer, a GSM module (SIM900), and a Raspberry Pi 4B. The Raspberry Pi 4B serves as the central controller, interfacing with the camera, buzzer, and GSM module to perform various functions.

Component List

OV7725 Camera Module

• Description: A camera module used for capturing images.
• Pins: 3V3, GND, SIOC, SIOD, VSYNC, HREF, PCLK, XCLK, D9, D8, D7, D6, D5, D4, D3, D2, RESET, D1, D0, PWDN

Buzzer

• Description: An audio signaling device.
• Pins: PIN, GND

GSM SIM900 Module

• Description: A GSM module used for communication over cellular networks.
• Pins: A5, A4, A3, A2, A1, A0, 5V, GND, 3.3V, RESET, D0, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, AREF

Raspberry Pi 4B

• Description: A single-board computer used as the central controller.
• Pins: 3V3, 5V, GPIO2, GPIO3, GND, GPIO4, GPIO14, GPIO15, GPIO17, GPIO18, GPIO27, GPIO22, GPIO23, GPIO24, GPIO10, GPIO9, GPIO25, GPIO11, GPIO8, GPIO7, ID_SD, GPIO5, GPIO6, GPIO12, GPIO13, GPIO19, GPIO16, GPIO26, GPIO20, GPIO21, ID_SC, TR01_TAP, TR00_TAP, TR03_TAP, TR02_TAP, RUN, GLOBAL_EN

Wiring Details

OV7725 Camera Module

• 3V3 connected to Raspberry Pi 4B 3V3
• GND connected to Raspberry Pi 4B GND
• SIOD connected to Raspberry Pi 4B GPIO2
• SIOC connected to Raspberry Pi 4B GPIO3
• VSYNC connected to Raspberry Pi 4B GPIO17 and GSM SIM900 RESET
• XCLK connected to Raspberry Pi 4B GPIO18
• HREF connected to Raspberry Pi 4B GPIO27
• RESET connected to OV7725 PCLK, OV7725 D9, Raspberry Pi 4B GPIO22, Raspberry Pi 4B GPIO23, and Raspberry Pi 4B GPIO25
• PWDN connected to Raspberry Pi 4B GPIO24
• D0 connected to Raspberry Pi 4B GPIO5
• D1 connected to Raspberry Pi 4B GPIO6
• D2 connected to Raspberry Pi 4B GPIO12
• D3 connected to Raspberry Pi 4B GPIO13
• D4 connected to Raspberry Pi 4B GPIO19
• D5 connected to Raspberry Pi 4B GPIO16
• D6 connected to Raspberry Pi 4B GPIO26
• D7 connected to Raspberry Pi 4B GPIO20
• D8 connected to Raspberry Pi 4B GPIO21

Buzzer

• PIN connected to Raspberry Pi 4B GPIO4
• GND connected to Raspberry Pi 4B GND

GSM SIM900 Module

• 5V connected to Raspberry Pi 4B 5V
• GND connected to Raspberry Pi 4B GND
• RESET connected to OV7725 VSYNC and Raspberry Pi 4B GPIO17

Raspberry Pi 4B

• 3V3 connected to OV7725 3V3
• 5V connected to GSM SIM900 5V
• GPIO2 connected to OV7725 SIOD
• GPIO3 connected to OV7725 SIOC
• GND connected to OV7725 GND, GSM SIM900 GND, and Buzzer GND
• GPIO4 connected to Buzzer PIN
• GPIO17 connected to OV7725 VSYNC and GSM SIM900 RESET
• GPIO18 connected to OV7725 XCLK
• GPIO27 connected to OV7725 HREF
• GPIO22 connected to OV7725 RESET
• GPIO23 connected to OV7725 RESET
• GPIO25 connected to OV7725 RESET
• GPIO24 connected to OV7725 PWDN
• GPIO5 connected to OV7725 D0
• GPIO6 connected to OV7725 D1
• GPIO12 connected to OV7725 D2
• GPIO13 connected to OV7725 D3
• GPIO19 connected to OV7725 D4
• GPIO16 connected to OV7725 D5
• GPIO26 connected to OV7725 D6
• GPIO20 connected to OV7725 D7
• GPIO21 connected to OV7725 D8

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including the components used, their connections, and the absence of any embedded code.