TV antenna principle circuit
#antenna
#RF
#television
#signal reception
#broadcast
#electromagnetic waves
#coaxial cable
#impedance matching
#receiver
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RF wireless allarm magnetic switch PIC16F84
This circuit was formed to create a wireless alarm from a normal magnetic contact. By fixing the magnet to the leaf of a door, or swing of a drawer, it is easy to reveal the opening. To transmit the signal...
What do I need for a basic RF circuit
The purpose of this circuit is for research and education. Assistance is sought in acquiring components for simple RF circuits, as well as tutorials or schematics. The requester is facing challenges in locating quality resources for beginner-level RF circuit building...
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,...
handheld RF-Powermeter for multiple sensors up to 12 GHz
A few years ago, a diode-sensor based RF power meter was built using a 68HC11 microprocessor. Prior to that, an analog RF power meter with a thermal power sensor was developed. The datasheets for logarithmic amplifiers, which promised a measurement...
RF Signal Attenuator up to 30dB for 1MHz - 500MHz Input
This is a PIN diode-based RF signal attenuator circuit that operates with input frequencies ranging from 1 MHz to 500 MHz. PIN diodes are among the most commonly used components in RF applications.
The RF signal attenuator circuit utilizing PIN diodes...
Antenna Combiner
The Antenna Combiner (A3021) is an active combiner designed to accommodate four 50-ohm coaxial antenna connections. It combines the signals from these four inputs, resulting in a net gain of approximately +11 dB. The A3021 is specifically intended for use...
DF data transmission module and the super-regenerative receiver module
The DF data transmission module operates at a frequency of 315 MHz and utilizes a surface acoustic wave (SAW) resonator for frequency stabilization, ensuring high frequency stability. The frequency drift remains minimal, at only 3 x 10^-6, across a temperature...
Active Antenna for Medium Wave
This circuit is designed to amplify the input from a telescopic whip antenna. The preamplifier is intended to operate within the medium waveband, covering frequencies from approximately 550 kHz to 1650 kHz. The required tuning voltage ranges from 1 to...
A Regenerative Receiver with AGC for 80 and 40 Meters
Here is a dual-band regenerative receiver that originated from encouraging communications with Jerry (K9UT) and another individual named Harvey, who constructed the original AGC-80 and its experimental successor, the AGC-80/30. Jerry has expressed his satisfaction with both receivers, noting their...