PC817 Optoisolator Module 2-Channel 3.6-30V PCB Mount for Arduino This module enables the use of a low-level signal to control a higher-level voltage, such as using a 3V or 5V signal to control a 9V or 12V voltage. It features the PC817 optoisolator, known for its optical isolation capabilities. The module provides two independent channels, allowing simultaneous operation of two separate input-output pairs. A jumper switch is included to select the output state between high and low, offering flexibility in output configuration. Suitable for use with Arduino and other microcontroller platforms. Ideal for circuits requiring electrical isolation, especially in electrically noisy environments, helping to prevent interference or damage to sensitive components. Useful in applications where low and high voltage circuits must be isolated while maintaining effective communication. Commonly used in environments where noise or interference may affect signal integrity. Voltage Range: Input Voltage Range: 3.6V to 24V Output Voltage Range: 3.6V to 30V The module can handle signals and voltages within these specified ranges.