Radio and communication circuits
#radio
#communication
#RF
#transmitter
#receiver
#antenna
#signal
#wireless
#modulation
#demodulation
No description available.
Deluxe Crystal Controlled Transmitter
A high-quality QRP transmitter, named NEXUS 6, is designed to explore issues related to extremely narrow bandwidth communication. This device is not merely a simplified version of a QRP transmitter; it aims to create a cost-effective system that can be...
RF-Radio Frequency 6
This circuit is designed to attenuate signal frequency, with a customizable range from 1 to 40 dB. For UHF band usage, it should be enclosed within a shielded frame, and capacitors C1 to C3 should be appropriately selected. The connection...
valved transmitter for 3.5 MHz
This transmitter project is a highly efficient, rugged, and simple low-power continuous wave (C.W.) unit delivering more than 10W. It is crystal-controlled with stabilized high tension (H.T.) and features a buffer stage between the crystal oscillator and power amplifier stages,...
30m Band Receiver
The direct conversion receiver described consists of only a bandpass filter, mixer IC, VFO and audio filter. With only 22 parts, this simple circuit should take a few hours at the weekend to construct. For extra simplicity, eliminate L1 &...
Bandswitched Grid Dip Meter
This circuit is designed for checking resonances in tuned circuits, antennas, and similar applications, covering a frequency range of 2 to 20 MHz. Q1 acts as an oscillator that can be tuned across this range using capacitor C1 and band-switched...
RF Induction Meter
This instrument measures inductances from 0.1 microhenry to 3 millihenries, divided into four ranges set by a switch. It operates from 12 volts and is powered by eight AA type cells attached to the unit. Initially, Drew Diamond's unit in...
making an rf car
This article is authored by Yash Tambi, a Core Committee Member of roboVITics. It discusses RF-controlled robots, which are among the simplest types of robots. The essential components include a few readily available integrated circuits (ICs), a 433 MHz transmitter...
RF based Automatic meter reading
RF based Automatic meter reading, or AMR, is the technology of automatically collecting data from energy meter and transferring that data to a central database for billing and/or analyzing. This means that billing can be based on actual consumption rather...
14W CW TRANSMITTER
A low-power two-stage FET transmitter designed for the 80-meter amateur band utilizes a Pierce crystal oscillator that does not require an output resonant circuit. A DC milliammeter can be connected across a 150-ohm resistor in the gate circuit of the...