10/12/2021 0 Comments Electronic Fingerprint Machine
It uses the ridges of your fingerprint that is placed over the conductive plates which changes the charge stored in the capacitor, while the valleys (air gaps) leave the charge on the capacitor unchanged. Similar to the capacitive touchscreen, it measures your finger by using human conductivity, creating an electrostatic field, and creating a digital image based on the electrostatic field.To go into more detail, the capacitive fingerprint scanner uses tiny capacitor array circuits that track the detail of a fingerprint. (Source: Android Authority/Robert Triggs) Capacitive Fingerprint SensorsIn today’s world, capacitive fingerprint scanners are more common and found on phones. The disadvantage to this, while highly unlikely, is that a digital photo can be replicated.Figure 1: Light source taking a digital image of a fingerprint. Figure 1 shows how the light source reads the fingerprint and where that information goes. The light-sensitive microchip makes the digital image by looking at the ridges and valleys of the fingerprint, turning them into 1’s and 0’s, and creates the user’s own personal code.For more articles like this one, check out:See whether the Arduino Uno Rev 3 or Raspberry Pi 3 is the board for your next project!See the inner works of Uninterruptible Power Supplies (UPS) and if you need one.Learn the physics behind how Touch Sensors work. After all, it was only a few years ago that phones didn’t have touchscreen or fingerprint applications on them. Smartphones are the best example on how sensors are quickly changing the way we go about our days. While it is more expensive, it’s also more complex and secure.As we become more advanced and IoT keeps growing, accurate data collection via sensors becomes more important. Figure 2 shows the physics behind this.Figure 2: How a capacitive fingerprint scanner captures digital images (Source: Android Authority/Robert Triggs)This technology is a lot harder to bypass since an image cannot get passed capacitive fingerprint sensor and other materials will record different changes in charge on the capacitor.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |