Xytron XY SOLAR WIFI PIR CAM Schematic Diagrams

The Xytron XY SOLAR WIFI PIR CAM is a solar-powered, wireless security camera featuring Passive Infrared (PIR) motion detection, Wi-Fi connectivity, and a built-in rechargeable battery. Below are detailed schematic diagrams covering the main board, power management, PIR sensor, Wi-Fi module, camera module, and overall system integration.

1. Overview & Block Diagram 2. Main Control Board Schematic 3. Power Management Schematic 4. PIR Sensor Circuit 5. Wi-Fi Module Interface 6. Camera Module Interface 7. Solar Charging Circuit 8. Battery Management 9. Connector & Pinout Details 10. Component Reference Designators 11. Notes & Design Considerations

Overview & Block Diagram

System architecture showing interconnections between major components.

BlockFunction
Solar PanelConverts sunlight to electrical energy for charging
Power Management Unit (PMU)Regulates power, manages battery charging/discharging
Main Processor (MCU)Central control unit, runs firmware, manages peripherals
PIR SensorDetects motion via infrared radiation changes
Wi-Fi ModuleProvides wireless network connectivity for data/control
Camera ModuleCaptures video and still images
Rechargeable BatteryStores energy for operation during low/no sunlight
LED IndicatorsStatus feedback (power, Wi-Fi, recording, etc.)
Microphone/SpeakerAudio input/output (if applicable)
SD Card SlotLocal storage for recorded footage

Main Control Board Schematic

Detailed circuit diagram of the main controller board.

  1. MCU (U1): Shows pin connections for power, ground, GPIO, UART (to Wi-Fi), I2C/SPI (to camera/PIR), ADC (battery monitoring).
  2. Clock Circuit: Crystal oscillator (e.g., 12MHz) with load capacitors.
  3. Reset Circuit: Power-on reset with debouncing capacitor and pull-up resistor.
  4. Debug Interface: SWD/JTAG header for programming and debugging.
  5. GPIO Headers: Connections to peripheral modules (labeled).

NOTE: All decoupling capacitors (0.1µF) must be placed close to IC power pins.

Power Management Schematic

Circuit for voltage regulation and distribution.

  1. Solar Input (J1): Diode D1 for reverse polarity protection.
  2. Charging IC (U2): Manages Li-ion/Li-Po battery charging from solar (e.g., TP4056). Shows PROG resistor for setting charge current.
  3. Voltage Regulators:
    • 3.3V LDO (U3) for MCU, Wi-Fi, PIR.
    • 1.8V/2.8V LDO (U4) for camera module core/IO power.
  4. Power Path: PMOSFET for battery-to-system power switching during low solar input.

WARNING! Ensure input voltage from solar panel does not exceed charging IC maximum rating.

PIR Sensor Circuit

Schematic for the Passive Infrared motion detection module.

Tip: Place PIR sensor away from direct heat sources and air vents to avoid false triggers.

Wi-Fi Module Interface

Connection diagram between MCU and Wi-Fi module (e.g., ESP8266, ESP32).

Module (U5): Shows VCC (3.3V), GND, EN (enable), RST (reset).

UART Interface: TXD (module) → RXD (MCU)
RXD (module) → TXD (MCU)
Optional RTS/CTS for hardware flow control.

Antenna Connection: Trace impedance matching (50Ω) to ceramic antenna or u.FL connector for external antenna.

Camera Module Interface

Schematic for connecting camera module (e.g., OV2640) to MCU.

  1. Power Pins: 1.8V/2.8V and 3.3V as per module specification.
  2. I2C Interface: SCL, SDA for camera control and configuration.
  3. Data Bus: 8-bit parallel D0-D7 (or serial MIPI depending on model).
  4. Control Signals: VSYNC, HREF, PCLK, XCLK.
  5. Reset and Power Down Pins: Connected to MCU GPIOs.

CAUTION! Keep camera data traces short and away from noise sources (power, switching circuits).

Solar Charging Circuit

Detailed schematic of the solar panel to battery charging path.

ComponentValue/Part No.Purpose
Solar Panel (SP1)5.5V, 1WPower source
Schottky Diode (D1)1N5817Prevents battery backflow to panel
Charging IC (U2)TP4056Constant current/voltage Li-ion charger
PROG Resistor (R1)1.2KΩSets charge current to ~1A
Status LEDs (LED1, LED2)Red/GreenCharging/Full indication

Battery Management

Circuit for battery protection and monitoring.

WARNING! Use only designated battery types. Incorrect battery may cause fire or explosion.

Connector & Pinout Details

Pin assignments for all external connectors and headers.

  1. J2: Solar Panel Input: Pin1 (+), Pin2 (-).
  2. J3: Battery Connector: Pin1 (BAT+), Pin2 (BAT-).
  3. J4: Debug/Programming Header: VCC, GND, SWDIO, SWCLK, NRST.
  4. J5: Camera Module FPC Connector: 24-pin, pinout matches camera module.
  5. J6: External IO Header: GPIOs, 3.3V, GND for expansion.

Tip: Refer to physical board silkscreen for connector orientation.

Component Reference Designators

List of key components with reference designators for BOM and board location.

DesignatorComponent DescriptionFootprint/Value
U1Main MCU (e.g., STM32F103)LQFP-48
U2Battery Charger IC (TP4056)SOP-8
U3, U4Voltage RegulatorsSOT-23-5
U5Wi-Fi Module (ESP-12F)Module
PIR1PIR Motion Sensor3-pin Module
CAM1Camera Module ConnectorFPC-24
BAT1Battery ConnectorJST PH 2-pin
Y1Crystal Oscillator12MHz, HC-49S
D1Schottky DiodeSMA

Notes & Design Considerations

AreaConsiderationGuideline
Power IntegrityNoise on power railsUse star grounding; place bulk and decoupling caps close to ICs.
Signal IntegrityCamera data linesRoute as differential pairs if MIPI; keep length matched.
RF LayoutWi-Fi performanceFollow module manufacturer's layout guide; keep antenna area clear.
ThermalBattery and IC heatingProvide adequate ventilation; avoid placing heat sources near battery.
Test PointsDebugging and validationInclude test points for key signals (power, UART, GPIO).

Disclaimer: These schematics are for reference. Actual implementation may vary. Verify all connections before powering.

Support: For technical queries, contact Xytron support at [email protected] or visit www.xytron.com.

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