12V Timer Relay Module with Adjustable Delay Control and Reverse Polarity Protection for Automation

This DC 12V Timer Relay Switch Module provides a simple, adjustable delay function for electrical and electronic projects. It combines a useradjustable timing potentiometer with builtin reverse supply protection and flexible trigger options, making it a practical choice for automation, development, and vehicle applications. Key benefits Adjustable delay for precise control: Default timing range 0 to 25 seconds set via the onboard potentiometer. Fine tune timing without extra tools. Extendable timing range: If you need longer delays, the timing interval can be increased by replacing the capacitor or the potentiometer on the module. Builtin power protection: A reverse diode at the power input helps protect the module and connected devices from damage caused by reverse polarity. Flexible triggering: Accepts both level and low level trigger signals, allowing straightforward integration with different control systems and sensors. Broad compatibility: Designed for DC 12V systems and suitable for robotics, automotive lamp delays, automation equipment, PLC development, smart home devices, alarm delay, and general electronic development. Features Operating voltage: DC 12V Default timing: 0 to 25 seconds, adjustable with potentiometer Timing extension: Change capacitor or potentiometer to increase delay Trigger input: Works with level and low level trigger signals Protection: reverse diode on power terminal for polarity protection Form factor: Compact timer relay module suitable for panel or prototype use Typical applications Automotive lighting delay: Add a delay to interior lights or headlights to prevent sudden on off switching when doors open and close. Robotics and automation: Control actuators or sequence operations where a timed off delay is required between steps. Smart home and alarm systems: Implement delayed shutoff for sensors, sirens, or lighting circuits to coordinate events and avoid false triggers. Installation and use notes Designed for 12V DC systems; verify system voltage before connecting. Adjust timing with the onboard potentiometer. For delays beyond the default range, the capacitor or potentiometer according to your desired timing characteristics. Ensure correct wiring and observe polarity; the module includes a reverse diode but correct connection is recommended for reliable operation. Compatible with both and low level control signals for easy interfacing with microcontrollers, PLCs, switches, and sensors. This timer relay switch module delivers a reliable, flexible delay function with simple adjustment and protective features for a wide range of electronic and automation projects.