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 […]
Search Results for: transmitter
Spy Circuits – FM Bug Transmitters
Here we’ll discuss how to make an electronic spy bug circuit using two methods, one that consists of wire link from the transmitter to the receiver, and the other which is completely wireless and can be used to eavesdrop a particular conversation over a range of about 30 meters, over an ordinary FM radio. All […]
1.5 watt Transmitter – 500 meter Range
This little transmitter will allow you to communicate, chat, send music transmission on any standard FM Radio tuned within the existing band, across a radial distance of not less than 500 meters or half a kilometers. Warning: Using this transmitter could be illegal in your country or area, take appropriate permissions before indulging. How it […]
Simple TV Transmitter
The TV transmitter circuit presented in this post incorporates the European standard FM frequency for audio and Video up-links. Referring to the circuit below, Q1 is configured as a preamplifier for amplifying the audio input to be modulated. Circuit Description Q2 is fundamentally responsible for conducting a couple of important functions: It amplifies the carrier frequency […]
Long Range Transmitter – 2 to 5 Km Range
The proposed long range transmitter circuit really is very steady, harmonic free design which you can use with standard fm frequencies between 88 and 108 MHz. Technical Specifications of the Transmitter This will likely encompass 5km spectrum (long range). It includes an extremely consistent oscillator for the reason that you employ LM7809 stabilizer that is […]
Stereo FM Transmitter using IC BA1404
The following posts explains how to build a simple to build FM stereo transmitter circuit using IC BA1404. About the IC BA1404 An exceptional stereo audio FM wireless transmitter circuit is presented below. The circuit relies upon the IC BA1404 from ROHM Semiconductors. BA1404 is a monolithic FM stereo modulator which includes integrated stereo modulator, […]
How to Make a Wireless Robotic Arm using Arduino
This robotic arm circuit which can be also implemented like a robotic crane, works using 6 servo motors and can be controlled through a microcontroller remote control, using an Arduino based 2.4 GHz communication link. Main Features When you are building something as sophisticated as a robotic arm, it must look modern and must include many […]
Ultrasonic Wireless Water Level Indicator – Solar Powered
In this post we are going to construct a ultrasonic based solar powered wireless water level indicator using Arduino in which the Arduinos would be transmitting and receiving at 2.4 GHz wireless frequency. We will be detecting the water level in the tank using ultasonics instead of traditional electrode method. By Girish Radhakrishnan Overview Water […]
Wireless Office Call Bell
In this post we are going to construct wireless office calling bell which can be used for calling 6 different personnel from head’s / boss’s desk or some other calling bell type fun project for your home. By Girish Radhakrishnan Using nRF24L01 2.4 GHz module We will be constructing a simple wireless calling bell using Arduino […]
Make this IR Remote Control Range Extender
In this post we will learn how to increase or extend the range of an ordinary infra red or IR remote control through a 433MHz RF remote control system. IR Range Extender Concept The idea of this circuit is to feed the IR data from an IR transmitter into the transmitter input of an RF […]
2 Simple Proximity Sensor Circuits
In this post we learn how to design your own simple yet useful proximity detector circuits using a single opamp LM351 and a couple of infrared diodes. Two concepts are explained here, the first one using an ordinary opamp, while the second one using IC LM567 which works with a phase locked loop principle ensuring […]
Using TSOP17XX Sensors with Customized Frequencies
We know that the center or band-pass operating frequency of a TSOP17XX IR sensor is assigned to a particular frequency which makes it difficult to use these sensors for designing unique or customized frequency based remote control circuits. In this post we will try to figure out an idea for enabling these sensors to work […]
Make this Line Follower Robot for Science Fair Project
In this post we learn how to build a line follower robot vehicle circuit using Arduino, which will run over a specifically drawn line layout and will faithfully follow it as long as it is available and traceable by its sensors. By Navneet Sajwan What is a Line Follower Robot An autonomous robot is a machine […]
Wireless Servo Motor Control Using 2.4 GHz communication link
In this post we are going to construct a wireless servo motor circuit which can control 6 servo motors wirelessly on 2.4 GHz communication link. By Girish Radhakrishnan Introduction The project is divided into two parts: a transmitter with 6 potentiometers and a receiver circuit with 6 servo motors. The remote has 6 potentiometers to […]
2.4 GHz 10 Channel Remote Control Switch
In this post we are going to construct a 10 channel remote control switch based on ISM (industrial, Scientific and Medical) band. By Girish Radhakrishnan Introduction The ISM band is operated at 2.4 GHz, which can be used without licensing with reasonable power output. The proposed project is general purpose ON/OFF wireless switch, which can […]
Car Parking Sensor Alarm to Alert Parking Obstacles
In this post we are going to construct a car reverse parking sensor alarm circuit using arduino, ultrasonic sensor and 2.4 GHz transceiver module. This project can be add-on feature for your car if it doesn’t sport a build-in parking sensors. By Girish Radhakrishnan Introduction The proposed project has similar functionality as traditional car parking […]
Wireless Thermometer Using 433 MHz RF Link and Arduino
In this post we are going 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. By Girish Radhakrishnan Using 433MHz RF Module and DHT11 Sensor The proposed project utilizes Arduino as brain and the heart as […]
Smart Laser Alarm Protection using IC 555
The post discusses the making of a simple yet effective smart laser alarm protection circuit using the IC 555, for securing a specified restricted zone from human interventions. The idea was requested by Mr. Collins. Protecting Home with Laser Alarms I just want to tell you what an amazing passion and dedication to electronics you […]
How to Connect an IR Photodiode Sensor
In this post we learn how to correctly connect an IR photodiode in circuits such as a proximity sensor circuit. The explanation is presented in the form a discussion between one of the dedicated readers of this blog NVD, and me. Here’s the discussion which explains how to connect a photodiode in an electronic circuit. […]
Learn to Make a Walkie Talkie using FM Radio
In this post we learn how to make a simple homemade walkie talkie circuit using ordinary FM transmitters and FM radios. Overview In one of my earlier post we comprehensively learned the making of a compact walkie talkie design, however I found that many new hobbyists and school students found the design difficult to adjust […]