PWM Control Module YYAC-3S for AC 220V Key benefits - Precise PWM control of mains AC for dimming, speed and power adjustment using a microcontroller output. - Built-in original thyristor and fully isolated input and output optocouplers for reliable low-current operation. - Simple integration with 3.3 V to 5 V microcontroller logic and a wide PWM frequency range for flexible control. Main features - Model: YYAC-3S PWM control module for 220 VAC mains. - Control input: Accepts PWM from a microcontroller IO pin. 0 V input produces 0 V output. 5 V input produces full 220 V output. - MCU compatibility: Operates with MCU logic supply between 3.3 V and 5 V. - PWM range: Frequency adjustable from 1 Hz to 500 Hz; duty cycle adjustable from 0 percent to 100 percent. - Output capacity: Controls AC loads up to 220 V at 3 A (maximum 660 W). The output requires a minimum load to perform normal voltage regulation. - Protection and isolation: Uses an original thyristor and optocoupler isolation between input and output to allow safe low-current control signals. How it solves common problems - Dimming and light control: Allows smooth dimming of compatible 220 V lighting by changing the PWM duty cycle from a microcontroller without handling high current on the MCU side. - Motor speed control: Enables basic AC motor or fan speed adjustment within the module load rating by altering the delivered power. - Power and temperature control: Can regulate heating elements or other resistive loads by adjusting mains power to meet system requirements. Typical application scenarios - Room or stage lighting dimmer: Connect the module between a microcontroller and 220 V lighting to implement dimming schedules, scenes, or remote control. - Fan speed controller: Use with household or small ventilation fans to vary speed via PWM commands from a microcontroller. - Heater or temperature control system: Modulate power to resistive heaters for basic temperature regulation when combined with a temperature sensor and control algorithm. Compatibility and installation notes - Ensure the controlled load does not exceed 220 V, 3 A (660 W). - Provide PWM signals within the specified frequency and duty ranges (1 Hz to 500 Hz, 0 percent to 100 percent). - Module logic supply must be compatible with 3.3 V to 5 V microcontroller systems. - The module requires a certain load for normal regulation; very light or no-load conditions may prevent proper output control. - Disconnect mains power before wiring. Follow proper mains wiring practices and applicable electrical safety rules when installing the module. Package contents - 1 x PWM control module YYAC-3S. This description reflects the YYAC-3S specifications and intended functions for safe and reliable PWM control of 220 VAC loads.