3.7V / 3.2V Solar Lamp Board Control Sensor, Infrared Human Induction Wall Light Control Sensor Controller

Product Description The 3.7V - 3.2V Solar Lamp Board is an all-in-one intelligent controller designed for modern solar wall lights and outdoor security lighting. This compact module integrates a high-sensitivity Passive Infrared (PIR) sensor with a sophisticated battery management system, supporting both 3.7V Lithium-ion and 3.2V LiFePO4 chemistries. The board automatically manages solar energy harvesting during the day and triggers the LED load upon detecting human motion at night. Featuring multiple lighting modes, it provides high-brightness illumination when motion is detected and switches to a power-saving dim mode or off-state when the area is vacant, making it the perfect core for DIY solar security projects.

Key Features

• Dual Battery Compatibility: Supports both 18650 Lithium (3.7V) and Lithium Iron Phosphate (3.2V) batteries with optimized charging profiles.

• Intelligent PIR Induction: High-precision motion sensing with a wide 120-degree detection angle for reliable security triggering.

• Automatic Day/Night Sensing: Uses the solar panel voltage to detect ambient light levels, eliminating the need for an external photoresistor.

• Multi-Mode Lighting: Typically supports "Full Bright + Dim," "Full Bright + Off," and "Constant Dim" modes to suit different environment needs.

• Integrated Protection: Built-in safeguards against over-charging and over-discharging to preserve battery health and prevent cell swelling.

Technical Details

• Sensing Mechanism: Utilizes a Fresnel lens coupled with a PIR sensor to detect heat signatures from human movement.

• Charging Logic: Constant Current/Constant Voltage (CC/CV) charging specifically tuned for 5V-6V solar panel inputs.

• LED Driver: On-board constant current driver ensures flicker-free performance for LED arrays up to 10W.

• Sensing Range: Advanced signal processing allows for motion detection up to 10 meters depending on mounting height.

• Standby Current: Ultra-low power consumption in sleep mode (<50uA) to ensure long-lasting operation during cloudy days.

• PWM Dimming: Uses Pulse Width Modulation to provide a "Soft-On" and "Soft-Off" transition, reducing strain on the LEDs.

• Panel Compatibility: Optimized for 5V to 6V small-format polycrystalline or monocrystalline solar panels.

• Time Delay Logic: Automatically resets the timer if continuous motion is detected within the 20-second active window.

• PCB Construction: Compact, moisture-resistant FR-4 PCB with gold-plated pads for high-quality soldering.

• Connector Layout: Clearly labeled pads for B+ (Battery Positive), B- (Battery Negative), S+ (Solar Positive), S- (Solar Negative), and L+/L- (LED Load).

• Thermal Stability: Components are rated for outdoor temperature fluctuations, maintaining accurate timing and sensitivity.

• Induction Frequency: High-speed scanning ensures the light triggers instantly as soon as a person enters the detection zone.

• Safety Isolation: Features independent paths for charging and discharging to prevent electrical interference.

• Compact Form Factor: Designed to fit inside the standard plastic housings of common solar wedge or brick lights.

• ESD Robustness: Shielded against static discharge, protecting the onboard MCU from handling damage.