build a Frequency Modulation circuit
#frequency modulation
#RF
#oscillator
#modulation
#communication
#signal processing
#transmitter
#receiver
#wireless
#electronics
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receiver architectures
Various architectures of receivers have been proposed in literature, but the most popular architectures among them, such as Heterodyne, Homodyne, Wideband-IF, and Low-IF, are presented here.
The Heterodyne receiver architecture utilizes two frequencies: the incoming radio frequency (RF) signal and a...
Remote ControlCircuit Through RF Without Microcontroller
This circuit illustrates a remote control circuit diagram using RF technology without the use of a microcontroller. Features include a simple remote control circuit that operates via radio frequency.
The remote control circuit operates by transmitting signals through radio waves, enabling...
VHF/UHF TV Modulator
A simple oscillator generates a frequency in the VHF or UHF range. This oscillator is modulated with a video signal, and the resulting modulated carrier wave is transmitted to the TV set's aerial input through a cable. The final step...
TA8136S Radio Control Transmitter Ic - Toshiba Semiconductor
TB6556FG is a 3-phase full-wave sine-wave PWM brushless motor controller. It features sine-wave PWM control and includes a built-in triangular-wave generator with a carrier cycle defined as fosc/252 (Hz). The device also offers a built-in lead angle control function that...
RF Based Wireless Remote Control Switch
It is often necessary to control electrical appliances remotely, even when there is no direct line of sight between the transmitter and receiver.
In modern electronic applications, remote control systems are increasingly utilized for various purposes, including home automation, industrial control,...
Wireless Microphone
Q1 amplifies the output from an electret microphone (MIC1). The audio signal is fed into oscillator Q2, which modulates the signal. Additionally, L1 and C1 form a tank circuit designed for operation in the 88-MHz frequency range. The antenna consists...
FM voice transmitter for Band 2 VHF
This compact transmitter employs a Hartley oscillator configuration. Typically, the capacitor in the tank circuit connects to the base of the transistor; however, at VHF frequencies, the base-emitter capacitance of the transistor behaves like a short circuit, maintaining its functionality....
Radio circuits built
This receiver is a modification of Charles Wenzel's Two Transistor Reflex Radio. Instead of a ferrite AM loopstick antenna, a magnetic loop antenna is used, and an LM386 amplifier stage has been added to drive an 8-ohm speaker. A switch...
G0MRF 29.45 MHz Receiver Project
In 2007 and 2008, AMSAT-UK dedicated significant effort to a proposal for the European Space Agency (ESA) to include an Amateur Radio payload on the mass dummy during the maiden flight of the VEGA launcher. This initiative was referred to...