|
|
Category: Inside Circuits Views: 5715 Rank: 10 This is a nice 2 Watts FM transmitter. It has a Super-Sensitive pre-amplification with BC109 and BC177 with more than 100% signal modulation. The job finish the 2N2219 by Motorola. For the Coils you should use 1mm wire(enameled), L1= 3 turns - 10mm diameter, L2= 1 turn - 10mm diameter. R9 trimmer controls the modulation gain. The tunning is easy by controlling C9 trimmer (88-108 MHz). The RFC J should be the VK220J with ferrite (VK200 is not suitable).  You will be amazed how well this little monster can transmit several kilometers excellent quality sound. Feed input from a simple cd player or PC (win amp) or just connect a microphone. Enjoy! Datasheet file1: Click here to download BC109.pdf datasheet. Datasheet file2: Click here to download BC177.pdf datasheet. Datasheet file3: Click here to download 2N2219.pdf datasheet.
Related circuits U2 is a decade counter /divider, Ul is used as a switch debouncer. For a self-generating system, connect a resis This circuit outputs a TTL-compatible - pulse whenever the signal falls within the limits set by potentiometers Power is fed to transformer Tl, a small neon-sign transformer, which steps the voltage up to about 3000 Vac. The stepped-up output of Tl is fed through L1 and L2 and across Cl, causing the capacitor to charge until enough power is stored in the unit to produce an arc across the spark gap. The... This circuit is used to observe the response of an if amp or a filter This pager allows you to use your in-house phone wiring as a PA system. It uses two tone decoders to detect a particular touch-tone key. This circuit is capable of driving filament lamps of nominal rating 200 mA at 60 V dc from a CMOS logic signal. The lamp or load is connected in series with the Darlington transistor TR1 and emitter resistor R5. The Zener diode ZD1 establishes a soft reference voltage on the collector of the... Using an SCR/relay combination, this circuit can be made to cut off ignition, unless a positive voltage is applied to Circuit uses a simple RC network to produce an exceptionally shrill tone from a miniature speaker. With the parts values shown, the circuit oscillates at a frequency of 3 kHz and drives a miniature 2W speaker with ear-piercing volume. The output waveform is a square wave with a width of 150 µ$,...
Articles & Projects
The best one I found was supposed to be portable and powered off mini barrel jacks which was annoying because I could not charge it on the go with incompatible charging heads for the car adaptor. So I decided to make ... As you can see from the circuitry above that the NS73M FM Transmitter Breako...
Low Power FM Transmitter s Figure 1 - Low Power FM Transmitter. Because the trimmer cap is very sensitive, make the final frequency adjustment on the receiver. When assembling the circuit, make sure the rotor of C3 is connected to the +9V supply. This ensures that there will be minimal .... Simpl...
In this section discuss about the series of mini fm transmitter, with broadcast coverage of about 300-400 meters. when using a 9 volt working voltage, the transmit power of about 300 meters and when using the working voltage ...
Simple FM transmitter circuit. Two transistor FM transmitter. Description. A lot of FM transmitter circuits have been already published here. ... Inductor L1 and trimmer capacitor C5 forms the tank circuit which is necessary for creating oscillations. .... AUTOMATIC RAILWAY CROSSING GATE CONTROLL...
In this section discuss about the series of mini fm transmitter, with broadcast coverage of about 300-400 meters. when using a 9 volt working voltage, the transmit power of about 300 meters and when using the working voltage ...
Heres a easy VHF FM transmitter that could also be used to play audio files from an MP3 player or pc on an ordinary VHF FM radio. The circuit use no coils that have to be wound. This FM transmitter can be used to take heed ...
FM Transmitter Kit. An Electronics DIY kit
Build your own Surveillance Spy Bug. FM Transmitter Bug. No special parts ne...
Comments
Berek Jeams wrote on Jan 9, 2008
remarkable!! Mine goes 3 km far! Just great
Manai wrote on Apr 11, 2008
very very good FM transmitter,i will try to do it but i need the PCB circuit :)
nermin wrote on May 17, 2008
Yes,another small transmitter.Nice but of course can not give 2W of output power.Anyone who have power meter can see that.According My previous works this thing could give some 100-300 mW,depending of many factors.But for beginners nice project for test.Good luck.
Tarun Dasgupta wrote on Sep 29, 2008
Nice project indeed ! Details of the RFCJ is needed (inductance ect.) so that one can make it of its own.Also, the output impedence (required for matching the antenna) is not mentioned.
Best regarts,
Tarun.
hama ersal wrote on Oct 31, 2008
hi .. yeah its simple
wrote on Nov 2, 2008
Nice project. What is the RFCJ, and is C8 also a variable capacitor?
wrote on Nov 2, 2008
could u explain how L1 and L2 is connected, it would be greatly appreciated!
MAHESH wrote on Nov 20, 2008
kindly tell me how many turns for rfcj&how to connect l1 l2
anas wrote on May 21, 2009
Nice project. but what is the range
abhi wrote on Aug 14, 2009
need the value of output transformer
abhi wrote on Aug 14, 2009
need the value of output transformer,value of RFCj
kap aryan wrote on Aug 20, 2009
this is the simpliest schematic diagram i see and now alread tested
wrote on Jan 14, 2010
Hi, friend! You forgot the coils details uh?
2nel wrote on Feb 8, 2010
Need the value of output transformer,value of RFCj ...Grazie!
flö wrote on Jan 17, 2012
I can't find that "VK220J" anywhere on the web. is there an alternative? did that part ever exist?
Frank wrote on Nov 30, 2011
yo what the f...k is the value of L3
Facebook Comments
Most searched
lm3915
Results: 15 Count: 10804
Automatic battery charger
Results: 960 Count: 9232
12v counter
Results: 965 Count: 8064
signal generator using XR2206
Results: 3108 Count: 7463
multivibrator
Results: 243 Count: 7458
12f629 switch
Results: 1604 Count: 7209
optocoupler
Results: 52 Count: 7094
bcd
Results: 40 Count: 6343 |
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
|
|
