- This is a 1 Channel DC 3 V Relay Level Driver Module with optocoupler isolation for insulated operation - Optocoupler isolation provides electrical separation between the control input and the relay coil, protecting your control electronics from voltage spikes and noise - Level driver design enables reliable switching of a DC 3 V relay from low voltage control signals - Comes with an insulated stick control board for safe mounting and operation - Specifically designed for use with relay modules to ensure compatibility and straightforward integration - Ideal for applications that require precise control with a DC 3 V relay - Use scenario 1: interface a microcontroller or single board computer to switch a 3 V relay in a hobby project or prototype - Use scenario 2: implement isolated control in a home automation or small automation system to protect control circuitry from relay power and transients - Use scenario 3: integrate into compact embedded systems where safe, reliable 3 V relay drive is required