Global Card ME

  There are four primary types of fingerprint scanners: Optical Scanners: How they work: Use a light source (LED) and a camera to capture an image of the fingerprint's ridges and valleys. Pros: Relatively inexpensive and easy to manufacture. Cons: Can be susceptible to dirt, moisture, and spoofing attempts using fake fingerprints made from materials like gelatin or Play-Doh. Capacitive Scanners: How they work: Measure the changes in electrical capacitance caused by the ridges and valleys of a finger placed on a sensor. Pros: More resistant to dirt and moisture than optical scanners, and generally more accurate. Cons: Can be more expensive to produce. Ultrasonic Scanners: How they work: Emit high-frequency sound waves that penetrate the skin's surface and map the fingerprint's 3D structure. Pros: Highly accurate and resistant to spoofing attempts. Cons: More expensive and complex to manufacture. Thermal Scanners: How they work: Detect the tempe...

RFID cards are used for contactless communication and come in various types based on their operating frequency, technology, and application. The most common RFID card types include: 1. Low Frequency (LF) Cards (125 kHz) Features: Operate at 125 kHz Short reading distance (up to 10 cm) Slow data transfer rate Common Standards: EM4100, EM4200, T5577 Applications: Animal tracking, access control systems, low-data applications 2. High Frequency (HF) Cards (13.56 MHz) Features: Operate at 13.56 MHz Reading distance up to 1 meter Moderate data transfer rate Can support encryption and read/write capabilities Common Standards: ISO 14443A/B: Used in NFC (Near Field Communication) cards like MIFARE and in contactless payment systems (e.g., bank cards) ISO 15693: Used in systems with longer read range than ISO 14443 NFC (Near Field Communication): Allows interaction with smartphones for mobile payments and data exchange Applications: Access control, transit cards, contactless payments, mob...