Voice control delay switch module for DC 39V systems. A compact sound activated delay module that detects voice or other audio signals and provides a timed switching output for automation and hobby electronics. Key benefits Adds sound or voice activation to simple DC projects without complex programming. Holds or delays an output after a detected sound, enabling timed actions and improved control. Compact module design integrates easily into prototypes and small devices powered by DC 39V. Reduces wiring and component count compared to building a sound detection and timing circuit from discrete parts. How it solves problems Replaces manual switches for applications that need hands or audio triggered control. Introduces a reliable delay function so the output does not instantly drop back when sound ends, preventing flicker or unintended switching. Works with common lowvoltage systems so it can be added to existing hobby or prototype circuits without changing power architecture. Key attributes Function: sound activated and voice activated switch with builtin delay switching behavior. Operating voltage: DC 39V, suitable for lowvoltage electronic projects. Form factor: compact electronic module suitable for direct integration on breadboards or inside enclosures. Construction: printed circuit board populated with standard electronic components for signal detection and timing. Performance: sensitive to audio input and provides a controlled switching response; designed for hobby and prototyping use. Compatibility Intended for use with DC 39V electronics and control systems. Compatible with microcontroller and hobby electronics projects that accept a switching input or output at low voltage levels. Suitable for battery powered or benchpowered setups that provide DC 39V. Example applications Voiceactivated lighting: trigger a lamp or LED circuit with a voice command and keep the light on for a set delay period without rewiring the main switch. Door chime or entry automation: use an audible signal to activate a relay or alert circuit for a fixed time after sound detection. DIY toys and interactive exhibits: add soundtriggered responses and timed actions to small devices and models. Practical notes Ensure supply voltage stays within DC 39V range for reliable operation. Check signal wiring and any interfaced devices to match expected switching levels. Module is intended for electronics projects and prototyping rather than industrial grade installations. This sound activated delay module offers a straightforward way to add voice or audio triggered timed switching to lowvoltage projects, simplifying integration and speeding up development for hobbyists and makers.