Keys Finders circuit | Next Electronics

This circuit is a wireless car alarm system that consists of two modules: a transmitter and a receiver. It operates on FM radio waves and is suitable for vehicles with a 6-12V DC power supply. A voltage stabilizer can be...

Vary the Volume of a Buzzer

This project involves creating a simple buzzer circuit that allows for volume control of the sound output. The volume can be adjusted using a potentiometer. When the potentiometer is set to a low resistance (near 0Ω), the buzzer produces its...

Wireless-fm-microphone

Transistor Q1 functions as an amplifier for the condenser microphone MIC1. The output from Q1 is fed to the base of transistor Q2 through a 4.7 µF capacitor. Capacitors C2 and L1 form an LC tank circuit, which is utilized...

Electronic Locker Guard

Protect your locker or briefcase from theft using this pocket-sized gadget. It emits a loud police siren to attract attention. The circuit utilizes a single integrated circuit (IC). This circuit is designed to provide a compact and effective security solution for...

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...

Bluetooth Based Smart Home using atmega8 microcontroller

This project automates home appliances via a Bluetooth-enabled PC. A USB Bluetooth adapter is utilized on the PC side, while a Serial Bluetooth module is employed for communication. This project involves the integration of a Bluetooth-enabled PC with home appliances to...

Security-door-ajar-alarm

The TL3019 device activates, or goes low, when a south pole of a magnet approaches the chip face. In this example, there are five doors, each equipped with a magnet embedded in its edge, with the south pole facing outward....

GlueLogix Technical Services

A wireless interface for your next project. With a coil, a capacitor, and a transistor, it is possible to create a device that emulates a Radio Frequency Identification Device (RFID), commonly referred to as a "tag" or "RFID tag." A...

Garage door open indicator

There are battery-powered wireless systems available, but the ones encountered would indicate that the door was open even if it was left ajar for ventilation. A system was desired that would alert when the door was fully raised. Additionally, it...