Global CLIP HUB on Instagram: "Fingerprint replication relies on a simple principle: human skin naturally leaves behind invisible residue wherever it touches smooth surfaces. That residue preserves the unique ridge patterns of a fingerprint, which can become visible when contrast is introduced and then transferred through contact. When those patterns are pressed into soft, impression-taking materials, the fine details can be captured as a mirror of the original print. The process isn’t about adv

Railway Crossing using Arduino uno