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2 Simple RF Detector Circuits Explored

Last Updated on January 19, 2025 by Swagatam 4 Comments

RF detector circuit using transistors

In this article I have explained a couple of very easy to build RF detector circuits, which can be used to sense or detect or sorts of Rf electrical noise that may be floating in the surrounding atmosphere. What is RF RF stands for radio frequency, which is a kind of electrical interference transmitted in […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Detector, Explored, RF, Simple

RF Amplifier Circuits and RF Converters

Last Updated on January 5, 2023 by Swagatam 11 Comments

FET 144 MHz converter compressed

In this article I have explained a few high frequency RF converter and preamplifier circuit designs which can be used for amplifying or enhancing the reception of an existing RF receiver. All the RF amplifier circuits provided below are intended to be placed near an existing amateur radio receiver or a matching radio set in […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Circuits, Converters, RF

Anti Spy RF Detector Circuit – Wireless Bug Detector

Last Updated on January 2, 2024 by Swagatam 98 Comments

ACFieldDetector

A anti-spy or bug detector circuit is a device that detects hidden wireless electronic devices such as wireless microphones, spy cameras, Wi-Fi devices, GPS trackers or any gadget that emits some kind of radio frequency (RF). The proposed design can be specifically used as: Overview Also called anti spy RF sniffer, these are usually used […]

Filed Under: Security and Alarm, Sensors and Detectors Tagged With: Anti, Detector, RF, Wireless

Wireless Thermometer Using 433 MHz RF Link Using Arduino

Last Updated on December 5, 2024 by Swagatam 6 Comments

In this post I will show how to construct an Arduino based wireless thermometer which can monitor the room temperature and external ambient temperature. The data is transmitted and received via 433 MHz RF link. Using 433MHz RF Module and DHT11 Sensor The proposed project utilizes Arduino as brain and the heart as 433 MHz […]

Filed Under: Arduino Projects Tagged With: 433, Arduino, Link, RF, Thermometer, Wireless

433 MHz RF 8 Appliances Remote Control Circuit

Last Updated on March 16, 2021 by Swagatam 90 Comments

In this post I have explained a circuit which can be used for controlling 1 to 8 appliances with a single RF 433MHz remote control handset. Now you can control fans, lights ACs, oven etc within a range of 50 meters with the same remote. In a few of my earlier posts I have comprehensively […]

Filed Under: Remote Control Circuits Tagged With: 433, Appliances, Control, Remote, RF

Making a Strong RF Discharge Circuit

Last Updated on August 13, 2023 by Swagatam 75 Comments

rfdischargegeneratorcircuit

In this article we study an RF discharge generation concept also called EMP generator capable of producing an intense RF electrical discharge in the air which may have the potentials of paralyzing and permanently damaging all electronic systems in the close vicinity. The idea was requested by Mr. Nidal. Technical Specifications I have seen a […]

Filed Under: Power Supply Circuits Tagged With: Discharge, Making, RF, Strong

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