|
|
Category: RF Circuits / FM Transmitter Views: 3313 Rank: 4 My site contains a few low power transmitters of one type or another, but until now no receiver. This circuit can be used to `sweep` an area or room and will indicate if a surveillance device is operative. The problem in making a suitable detector is to get its sensitivity just right; too much and it will respond to radio broadcasts, too little sensitivity and nothing will be heard. visit page.
Related circuits AVR Microcontrolled PLL FM Transmitter An LMX1601 Phase locked loop, a discreet FET VCO, and an AVR micro controller combine to make a stable, easy to use monophonic FM transmitter that includes a an audio activated switch that turns the transmitter on only when its being used. The common characteristic of all of the previous low... Voice-Modulated Pulse Fm Ir Transmitter This circuit has a 741 audio amplifier, which is fed by a microphone (use an amplified type), an FM A simple FM transmitter links your home-entertainment system to a portable radio that can be carried around the house and into the back yard. For example, you can play music on the CD changer in your living room, and listen to it on a portable radio by the back-yard barbeque. 5W PLL FM Transmitter (PIC16F627A) The transmitter includes RDS/SCA input and Audio/MPX input with optional preemphasis. It can be used with or without stereo encoder. Tuning over the FM band is provided by two buttons that control dual-speed PLL. The transmitter can work also without the LCD display. Some experience with building... This is an image Schematic. No Description available. Here it is a brand new TX300 FM transmitter. The amplifier has exactly the same architecture as TX500 with the difference that TX300 has only one stage variable VHF amplifier. It is a cute schematic that was made for all of you who wanted something even simpler than TX500 and with not as many... Use standard rf wiring precautions. The best speech clarity is obtained by using an electret microphone. FM Stereo Transmitter with BA1404 You'll find that this is a very easy project to build. It will transmit good quality sound in the FM band ( 88 - 108 mhz ). One inportant item is that the IC chip operates on 3 volts DC. The chip will get destroyed if it is operated on any voltage higher than 3.5 volts. The antenna can be a... FM surveillance BuG Transmitter « Inside Circuits « Free Electronic Circuits ...
Electronic Eavesdropping Device Detector Circuit Tested (Senior Design Project)
Comments
Facebook Comments
Most searched
lm3915
Results: 15 Count: 10855
Automatic battery charger
Results: 960 Count: 9452
12v counter
Results: 965 Count: 8141
signal generator using XR2206
Results: 3108 Count: 7532
multivibrator
Results: 243 Count: 7501
12f629 switch
Results: 1604 Count: 7356
optocoupler
Results: 52 Count: 7116
2 digit counter ic 4026
Results: 9619 Count: 6451 |
Accounts area
Circuits
Audio Filters
Stereo Circuits Ultrasonic Circuits Amplifiers Audio Oscillators Preamplifiers Audio Mixers Equalizers Tone Balance Beeper Buzzer Vacuum Tubes Valves Musical & effects Microphone Circuits
PLL Circuits
UHF circuits VHF Circuits FM radio GPS Circuits Jammer Circuits RF Transmitters RF Receivers RF Amplifiers AM radio Antenna Circuits FM Transmitter Transceiver Circuits
Demodulators
Buffer Circuits Triac Circuits Mosfet Circuits Sequencer 555 Timer Circuits Doorbell Circuits Switching Circuits Remote Control Toy H Bridge Circuit Game Circuits Keypad Circuits
Metal Detector Circuits
Liquid Sensing Circuits Light Sensing Circuits Voltage Detector Circuits Air-Gas Detection Circuits Human Sensing Circuits RF & Radiation Medical Circuits Sensor Circuits Magnetic circuits Optical Sensing Circuits Hall Effect
Varius Circuits
Astable Colpitts Crystal Hartley RF Sine wave Square wave Volt controlled Wein Bridge Monostable Circuits Pierce
Tesla Circuits
Inverter Circuits Free Energy Circuits Chargers AC to DC & DC to DC Solar Cell Circuits Current Limiting Mirco Power Circuits High Voltage Switching Power Supplies
Timer Circuits
Voltmeters Frequency meter Meters Circuits Counters Clock Circuits Checker Circuits Delay Circuits Thermometer Circuits VU Meters
Infrared
Xenon Lighting Light Sensing Laser Led circuits Fluorescent Circuits LCD circuits Light Dimmers
Readout Circuits
Logic Circuits Digital to Analog Display Circuits Analog to Digital Data Logging Data Bus Circuits Decoder Circuits
Voltage to Pulse
Current to Voltage Frequency to Voltage RF Converter Circuits Sine to Square Wave Voltage to Current voltage to frequency Period to Voltage
Video Mixer
Video Wall circuits TV Video Circuits Modulator Camera Circuits Television Photo Flash Video Amplifier
Stepper Motor
Remote Control Servo Circuits Robotics Direction Finder Power Control Relay Circuits Motor Control Circuits
Arduino projects
PIC Microcontroller AVR Microcontroller Programmers 68HC11 Microcontroller 8051 / 8052 MCU Circuits
|
|
Electronic Circuits Schematics Projects
|
|
