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Micro Power AM Broadcast Transmitter – Circuit Schematic
Micro Power AM Broadcast Transmitter
In this circuit, a 74HC14 hex Schmitt trigger inverter is used as a square wave oscillator to drive a small signal transistor in a class C amplifier configurati...
AM To FM converter – Circuit Schematic
AM To FM converter
We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of a...
FM bug Spy transmitter circuit – Circuit Schematic
FM bug Spy transmitter circuit
Take a look at this fm spy transmitter which can be used as a bug transmitter or as diy fm bug too. It uses a single IC 74F13, one coil, a capacitor, one t....
FM antenna amplifier circuit – Circuit Schematic
FM antenna amplifier circuit
Use this fm antenna amplifier in areas where the signal reception of FM stations is too bad. This circuit is just the right thing to do it. It is designed....
FM Transmitter Using Logic Gates – Circuit Schematic
FM Transmitter Using Logic Gates
This is a FM Transmitter circuit. This circuit uses logic gates. This transmitter circuit has a RF oscillator. This oscillator uses 10.7Mhz ceramic filter and....
FM Radio Receiver for Battery Supply – Circuit Schematic
FM Radio Receiver for Battery Supply
The TDA7088T can be used in mono portable and pocket radios. This is a bipolar integrated circuit. Here`s one of the application circuit diagram: When a....
Dual Litz Honeycomb Coils Crystal Radio – Circuit Schematic
Dual Litz Honeycomb Coils Crystal Radio
I hope that this crystal set is well received by all of you. My #62 radio combines the features of some of my earlier radios. It combines the one piece approach...
Closed-Loop Automatic Power Control for RF Applications – Circuit Schematic
Closed-Loop Automatic Power Control for RF Applications
This is a circuit of Closed-Loop Automatic Power Control for RF Applications. The circuit uses a log detector (AD8318) and a VGA (ADL5330). This circuit has a....
CXA1019 FM Radio – Circuit Schematic
CXA1019 FM Radio
CXA1019 FM RADIO CXA1019 is a one-chip FM/AM radio IC designed for radio-cassette tape recorders and headphone tape recorders, and CXA1019S has the....
Booster Antenna Circuit 550Khz to 1650Khz – Circuit Schematic
Booster Antenna Circuit 550Khz to 1650Khz
Here is abooster antennacircuit for 550Khz to 1650Khz. to amplify the input from a telescopic antenna. cover the medium waveband from about 550Khz to 1650Khz. T...
Basic Wide Range Phase Locked Loop (PLL) – Circuit Schematic
Basic Wide Range Phase Locked Loop (PLL)
A phase-locked-loop (PLL) is a servo system, or, in other words, a feedback loop that operates with frequencies and phases. PLL`s are well known to be quite use...
Basic RF Oscillator circuit diagram – Circuit Schematic
Basic RF Oscillator circuit diagram
You can experiment with the size of the coul and the number of turns to see how it affects the frequency and signal output of the oscillator. You should be able...
BH1417 USB FM Transmitter – Circuit Schematic
BH1417 USB FM Transmitter
Here`s BH1417 USB FM Transmitter with built-in PLL circuit. Its low-frequency signal is converted into high-frequency, which can take any audio device with FM r...
Another Small Single Chip FM Transmitter – Circuit Schematic
Another Small Single Chip FM Transmitter
This FM transmitter circuit is small, similar to our previous single chip FM? transmitter, but this FM transmitter is monophonic. You can see in the circuit`s....
Another RF Field Strength Meter – Circuit Schematic
Another RF Field Strength Meter
This circuit is another radio frequency (rf) field strength meter, similar with our previous field strength meter circuit, but with lower supply voltage (only a...
Aerial BoosterCircuit for Citizens Band Project – Circuit Schematic
Aerial BoosterCircuit for Citizens Band Project
This simple aerial booster circuit design might be an alternate or a hobby project for making such an aerial booster device for the Citizen Band (CB) radio...
AM Transmitter circuits – Circuit Schematic
AM Transmitter circuits
The AM Transmitter circuits in two and a half, audio amplifier and an RF oscillator. The oscillator is built around Q1 and associated components. Tank circuit L...
AM Radio Receiver Circuit Using TDA 1072AT IC – Circuit Schematic
AM Radio Receiver Circuit Using TDA 1072AT IC
TDA1072AT is a special purpose integrated circuit for AM radio receiver from Philips Semiconductors. The integrated circuit is designed for mains-fed home recei...
RF Signal Detector using TDA2822 – Circuit Schematic
RF Signal Detector using TDA2822
signal detector electronics that can be used to detect the signal does not AF / RF. This series is very neat and easy to make....
88 108 MHz FM transmitter BF982 BF199 BFR90 – Circuit Schematic
88 108 MHz FM transmitter BF982 BF199 BFR90
The most important part of this 88-108 transmitter is the Colpitts oscillator. C3,C4,C5,C6,CD1-CD2 ans L1 determine the transmission frequency. The RF Osci....