Abstract: In this letter, a dual-band rotational feed circularly polarized (CP) antenna array is proposed. The dual-band antenna element consists of two pairs of symmetric dipoles. The low-frequency ...
This is a cheap option to implement an Activ-IoTy compatible checkpoint. Athletics events are usually controlled by officials with different roles such as: judges, timekeepers and starters. Other ...
An Arduino-based RFID door lock system designed to control a 12V solenoid lock using authorized RFID cards. This project implements a non-blocking state machine system for reliable and efficient ...
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