The indoor based on RFID positions system design
#RFID
#indoor positioning
#tracking system
#proximity sensor
#wireless communication
#identification system
#location tracking
#automation
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Baseband Circuits for an RFID Receiver
Figure 1 shows the block diagram of a direct conversion RF receiver—the receiver demodulates an RF carrier directly into a baseband signal without an intermediate frequency down-conversion (a zero IF receiver). The antenna, shared by both the transmitter and receiver,...
hacking rfid for fun
Articles about reading and writing RFID proximity cards used for access to controlled areas emerged from discussions regarding the ease of cloning such cards. Research led to discussions with Carl, who has dedicated significant time to exploring these hacks. Proxclone...
Proximity sensor - Page 2
The circuit operates but exhibits instability, particularly with temperature variations. For example, upon powering it on and tuning it, switching it off and on again affects its performance. The control voltage (CV) output is essential for the theremin/controller circuit. This...
EM4294 13.56MHz Crypto Analogue Front End Circuit For High Secure RFID Communication
The EUA2032 is a high-efficiency, 2.5W mono class-D audio power amplifier. A newly developed filterless PWM modulation architecture further reduces EMI and THD+N, as well as eliminates the LC output filter, thereby reducing the external component count, system cost, and...
Doorknob Proximity Alarm for wooden door
Reverse engineered circuit diagram of a popular retail doorknob alarm. It contains a small transmitter and the doorknob acts as an antenna so it will not work on a metal door. When a person comes close to the doorknob this...
Presence detector proximity sensor circuit
This circuit responds to the presence of any conductive object, including humans. It does not detect object movement but can function as a proximity sensor.
The circuit operates on the principle of capacitive sensing, utilizing a capacitor to detect changes in...
Objects in Flux
The Open Source Automation project is a free automation software that operates on Windows and does not require programming for setup. It features a user-friendly graphical interface and includes unique functionalities that are not typically found in high-end security and...
RFID Based Security System with AT89S52
This project aimed to develop a wireless system to detect and allow only the authorized persons. The system was based on Radio Frequency Identification (RFID) technology and consists of a passive RFID tag. The passive micro transponder tag collects power...
DIY FSK RFID Reader using Arduino
This document describes the construction of an RFID reader utilizing an Arduino (specifically tested with the Nano 3.0, although other models may also be compatible), a hand-wound wire coil, and various low-cost common components. RFID readers are devices manufactured by...