Results tagged #Rf in Circuits
RF Remote Control Switch Rx-Tx circuits
This circuit consists of a 2048 radio remote control transmitter and the corresponding wireless receiver with very high reception sensitivit...
Radio harmonic detection circuit
FIG demodulation and detection circuit is a radio, AM intermediate frequency signal IF amplifier after a two-stage detection performed by th...
DF data transmission module and the super-regenerative receiver module
DF data transmission module operates at 315MHz, the use of surface acoustic wave resonator SAW frequency stabilization, high frequency stabi...
DF data transmission module and the super-regenerative receiver module
DF data transmission module operates at 315MHz, the use of surface acoustic wave resonator SAW frequency stabilization, high frequency stabi...
Simple RF Signal Generator
This circuit came out of some work I did for the two antenna analysers which are described elsewhere on this site. Those instruments both in...
RF Decibel Meter
This is a zine dedicated to electronics circuit diagrams, diy (do it yourself) electronics projects, electrical electronics data sheets, and...
Sensitive RF Voltmeter Probe
Sensitive RF Voltmeter Probe Circuit This Circuit measures RF voltages beyond 200MHz and up to about 5V. PARTS LISTR14.7M?R21M?R31M?R4100k?R...
RXTX V6.3 RX Switching
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RX/TX Switching Circuit
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Grounded Grid Amplifiers
Floating the grid above ground is bad for RF, and bad for arc protection. The control grid ground is also the single most critical connectio...
Wide Dynamic Range Field Strength Meter
A field strength meter is a very handy tool for locating a transmitter. A sensitive field strength meter by itself has some limitations, how...
SENSITIVE RF VOLTMETER
This schematic shows a peak-reading diode voltmeter driven by two stages of amplification. A 100- F capacitor provides a fairly large time c...
RF transmitter circuit
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Rf Remote Control Transmitter Circuit
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RF Circuitry Links
The 7th overtone of 18mhz (17m) is 144mhz (2m) smack dab in the CW region. Icarus a HAB project run on advertising revenue that seems succes...
Basic RF Oscillator
Make a basic RF oscillator. The circuit is ridiculously simple, so I will skip all the complicated maths and make component selection simple...
2 channel RF remote control
The basic small-range remote controls are 2, Infrared and RF (Radio Frequency). One of the weaks of Infrared is that the signal can not pass...
2 channel RF remote control
The basic small-range remote controls are 2, Infrared and RF (Radio Frequency). One of the weaks of Infrared is that the signal can not pass...
An ultra-low power RF interface for wireless-implantable microsystems
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An ultra-low power RF interface for wireless-implantable microsystems
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Radio-frequency schematics
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Radio-frequency schematics
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One Receiver
RF Cafe visitor David M. wrote to ask that I scan and post this article from the January 1963 edition of Popular Electronics. It is an artic...
One Receiver
RF Cafe visitor David M. wrote to ask that I scan and post this article from the January 1963 edition of Popular Electronics. It is an artic...
Simple RF Transmitter
This schematic is a tone transmitter. For sufficiently small values of the resistor, it outputs a tone, so having a resistive mic (carbon mi...
The Defpom RF Preamplifier
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I and Q Phasing
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RF Circuit
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GBPPR 1 GHz RF Spectrum Analyzer
A RF spectrum analyzer is one of the most useful tools an experimenter can have. The spectrum analyzer project shown here will be a slight i...
RF-Workbench
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RF Combo
The RF Combo (A3016) is a combination of three circuits. Its purpose is to provide circuit boards for Stage Four of our subcutaneous transmi...
Cyclotron II
The white feedthroughs are for the attachment of the RF high voltage to the D`s (not shown). The copper pipe normal to the pipe is the vacuu...
SIMPLE RF REMOTE CONTROL CIRCUIT
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SIMPLE RF REMOTE SWITCH CIRCUIT
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RF Test Circuits
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rf radio
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high level wideband rf preamplifier
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Armstrong Oscillator
The ARMSTRONG OSCILLATOR is used to produce a sine-wave output of constant amplitude and of fairly constant frequency within the rf range. I...
RF field strength meter
A very simple Field Strength Meter composed of a small antenna, a detector diode, a resistor, capacitor and a Micro Ammeter. Assuming that t...
RF Jammer Diagram
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RF OSCILLATOR CIRCUITS
A popular circuit known as a Hartley oscillator. Its identifiable feature is the tapped coil in the LC tank circuit. Notice that the coil`s ...
Four channel RF remote control
This is a very simple RF transmitter circuit that consists of the Holtek HT-12E encoder chip and AM 418MHZ-transmitter module ( WZ-X01 ). Us...
4 Band Double Tuned Preselector
The circuit requires an RF input which can be from a longwire or a loop antenna. The Preamplifier has a range from 550kHz (Medium Wave) up t...
Field Strength Meter
This is a wide band signal strength meter circuit which responds to small changes in RF energy, designed to be used for the VHF spectrum and...
RF communication
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Radio Field Indicator Circuit
A rf field indicator is required to verify power stages and transmitters antennas. With this radio field indicator you can measure radiated ...
RF Based Wireless Remote Control Switch
It is often required to switch electrical appliances from a distance without being a direct line of sight between the transmitter and receiv...
RF Decibel Meter Circuit
An DIY RF decibel (or power) meter is an indispensable instrument in any radio workshop. Unfortunately, accurate, wideband models are fairly...
RF Field Strength Meter Circuit
A sensitive and reliable rf field strength meter is an invaluable instrument in amateur radio and in radio controlled model area. A field st...
Transmitter RF Output LED Indicator
Transmitter RF Output LED Indicator Circuit Diagram This RF output detector circuit using a visual indicator can be useful for an RF.....