Left-Hand and Right-Hand Card Reader

By Yang, ZHAO

Left-handedness means a person prefers to use his/her left hand rather than right hand for general activities such as writing. Some studies show that approximately 10% of the people in the world are left-handed. Thus, almost all systems in the world serves right-handers. Luckily, there are now more products with special versions for left-handers. In this project, we design a card reader for both left-handers and right-handers.

The top view of the reader is shown in Fig. 6.1.

Figure 6.1: The top view of the card reader

The followings are the components used in the reader:

• Arduino Leonardo microcontroller
• RFID 28140 card reader
• RFID Tag card
• ToF (Time-of-Flight) VL53L0 sensor
• LED indicator

The block diagram of the reader is shown in Fig. 6.2 and the outlook of the reader is shown in Fig. 6.3. The red LED shows the user is left-handed while the yellow LED shows the user is right-handed.

Figure 6.2: The block diagram of the card reader

Figure 6.3: The outlook of the card reader

The demonstration video is shown below.

Comment by judges: The idea is fine but the design is too simple. The design should involve more aspects like the conflict of two persons going to the same gate and the possibility of the detection failure (e.g., misclassify a right-handed person as a left-handed person).