Fingerprint Access Control Board S3 for DIY Door Lock Systems This fingerprint identification control board S3 is a compact, relaybased access controller designed for DIY installations and integration with existing door lock hardware. It accepts a wide voltage range for flexible power setups and provides a direct relay output to drive electric strikes or magnetic locks. Key benefits Biometric access control without complex infrastructure: Add fingerprint entry to a door or cabinet with a single board and a compatible lock. Wide voltage compatibility: Operates from 7 to 30 V DC, making it suitable for common 12 V and 24 V systems and a variety of power supplies. Simple relay control: Builtin relay output switches standard electric strikes and magnetic locks for reliable door release. Compact and integrationfriendly: PCB form factor fits in small enclosures and mounts easily inside housings or retrofit installations. DIY friendly: Intended for makers, installers, and technicians who need a straightforward fingerprint controller for custom projects. Primary functions and attributes Function: Fingerprint identification module with relaybased door lock control for access management. Power: Works with 730 V DC input, tolerant of common supply voltages used in access control applications. Compatibility: Designed to interface with standard electric strikes, magnetic locks, and door locking hardware that are driven by a relay contact. Compatible with typical control wiring used in DIY and commercial access systems. Form factor: Compact PCB control board suitable for mounting in enclosures or behind panels. Build: Electronic components mounted on a printed circuit board for direct integration into custom installations. Practical use scenarios Home or small office door retrofit: or augment keyed locks by wiring this controller to an electric strike and a fingerprint reader to enable keyless biometric entry. DIY smart lock project: Combine the board with a microcontroller or standalone fingerprint sensor to create a custom access system for workshops, garages, or storage cabinets. Controlled equipment or room access: Use the relay output to manage entry to server rooms, supply closets, or shared facilities where biometric identification is preferred over keys or codes. Installation notes Connect the DC power supply within the 730 V range to the power terminals. Wire the door lock to the relay output according to its rated voltage and type. Mount the PCB in a secure enclosure to protect components and wiring. Use appropriate wiring practices and fusing for the power source. Model identification Product model: S3 fingerprint control board, DIY relay door lock controller, fingerprint identification module, 730 V input. This control board provides a practical, voltageflexible solution for adding fingerprintbased access to doors and equipment using a relaydriven lock output. It is suited for retrofit projects and custom access control implementations where a compact, straightforward biometric controller is required.