Simple metal detector kit with loose circuit board — user-assembled Key benefits Hands-on learning: Builds practical understanding of electronic circuits while you assemble and test the detector. Functional detection: Detects surrounding metal objects within a short, reliable range to demonstrate sensing principles. Skill development: Assembly and soldering requirement makes this an ideal project for students, hobbyists, and beginners who want to practice soldering and circuit construction. Compact performance: Detects metal targets at approximately 3–5.0 cm; larger metal areas increase the detection distance. What this kit does Detects surrounding metal objects and demonstrates how metal sensors respond to target size and proximity. Provides a loose circuit board design that must be soldered and assembled by the user, reinforcing circuit layout, component placement, and troubleshooting skills. Important specifications and attributes Detection distance: about 3–5.0 cm; larger metal areas will be detected from a greater distance. Circuit format: loose circuit board(s) included — intended for soldering and assembly by the purchaser. Function: basic metal detection for educational and experimental use. Who this is for Electronics students and teachers using a simple practical device to illustrate circuit and sensor principles. Hobbyists who want a compact project to practice soldering, component assembly, and basic electronic testing. DIY experimenters who need a small-range detector to test metal presence in prototypes or small assemblies. Use scenarios Classroom lab: Students solder and assemble the kit, then test detection range with coins, screws, and metal strips to learn how sensor response varies with target size. Home workshop project: Hobbyists assemble the board, verify operation, and use it to check for hidden metal fasteners or small metal parts in materials. Electronics training: Trainees practice soldering and circuit debugging by building the detector and observing how component placement and connections affect performance. Notes and user expectations This is a kit with loose circuit board(s); it requires soldering and basic assembly skills and tools. The detector is intended for short-range detection (3–5.0 cm) and for educational or experimental use rather than industrial applications.