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All devices that are designed to send and receive signals from two distant set ups for implementing an intended operation without using physical wires or contact across the two installations are called wireless systems, and the involved gadgets are called wireless devices.
Under this category you will find some amazing related circuits mainly based on FM wireless transission.
FM stands for frequency modulation and today most of the wireless based devices are controlled using FM signals at different frequency levels.
Here you will comes across a vast range of designs starting from the most basic ones suitable for new hobbyists to the relatively complex ones designed for the engineering students and experts in the field.
You will find some interesting FM remote control circuits which could be used for remotely operating an intended job such as doors locks and safes, you will also discover a few sophisticated GSM based highly advanced remote controlled systems working through cellphone networks.
The 10 km range, 27 MHz transmitter circuit explained here uses citizen’s band which consists of 2 main types of users: radio control (R/C) modellists and users of low-power FM transceivers for local communication. However, here it is designed and intended for testing antennas and aligning receivers. It is actually an AM/FM quartz controlled for … Read more27 MHz Transmitter Circuit – 10 Km Range
In this post we are going to construct a GSM based car security system using Arduino, which can lock and unlock car’s ignition system and central lock by sending a password SMS to car from your cellphone By Arduino Guru Car theft can be a heart break; it feels like your loved one got kidnapped. … Read moreGSM Car Ignition and Central Lock Circuit Using Arduino
In this post we learn how to transmit Internet data through LiFi using a class D amplifier as the transmitter and an ordinary audio amplifier circuit as the receiver. How Li-Fi Concept Works If you are wondering how a LiFi concept could be used for transmitting USB data, this article will provide with all the … Read moreLiFi Internet Transmitter Circuit – USB Signal Transfer through LED
In this post we learn how to make a simple homemade walkie talkie circuit using ordinary FM transmitters and FM radios. It’s a perfectly tested design by me. I could talk with my nephew who stays on first floor through a pair of these transmitters with crystal clear transmission. Overview In one of my earlier … Read moreMake a Walkie Talkie Circuit using FM Radio
In this article we are going to take a tour on RFID circuit technology. We will be exploring how RFID tags and readers work, how to interface RFID module (RC522) with Arduino and extract some useful information from the RFID tags. Using RFID Tags I am sure every one of you has used RFID … Read moreRFID Reader Circuit using Arduino
The post explains how to use Bluetooth technology for transmitting PWM wirelessly, the circuit application could be used for controlling various appliances such as motors, lights, RC gadgets etc using your Android phone. The Bluetooth PWM Transmitter In one of my earlier posts I explained how to hack and modify a Bluetooth headset for making … Read moreBluetooth PWM Motor Controller Circuit