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UHF-TV Preamplifier - UHF-TV Preamplifier |
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USB FM Transmitter MAX2606 - This MP3 Player FM transmitter can
be used to listen to your own music throughout your home. The transmitter
circuit use no coils that have to be wound. When this FM transmitter used
in the car, there is no need for a separate input to the car stereo to
play back the music files from your MP3 player. |
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USB RDS Coder Board using ATmega32 - This board is a RDS coder
using an ATMEL AVR ATmega32. This board can be controled by a RS232
link, USB interface or SPI. TA data is displayed wiyth a LED and can be
controled by : - Hardware input - RS232 - USB - SPI (not yet implemented)
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V7 VHF FM Transmitter - The circuit itself is fairly
conventional, with a couple of small refinements. It all begins with TR1
(BC547) in an inverted Hartley oscillator configuration. The feedback to
the Base of TR1 is via a small 4.7pf capacitor to help keep the
oscillations as weak as possible whilst allowing the oscillator to be a
reliable starter..... [from Harry Lythall's website] |
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Variety of receiver converter projects - The FM broadcast band was moved
immediately after World War II from its original spot just below 50 Mc to the present
88-108 Mc band. Hallicrafters was one company to offer receiving converters for
those who had the old FM radio sets. The offerings included a one-tube converter
that fits inside a console and draws power from the audio output tube socket (using an
adapter).,,,,(circuits added 05/06/07) |
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Veronica 1W PLL FM Transmitter - The VERONICA transmitter is a very stable,
powerful, and high quality FM emitter. Thanks to a PLL, the output frequency is
controlled with DIP switches. Output power is approximatively 1W with a single
regulated 13.8v supply ! (see specifications) Features : * High RF output power : 1W *
Full 87.5-108MHz range (100KHz increment). * Very stable output frequency : Crystal
reference & Phase Locked Loop. * Professional input bandwith (fully RDS compatible ) *
No complex tuning needed. * High quality PCB * Full documentation & construction
details available.….(Circuit design added 12/08) |
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VHF Audio Video Transmitter - Build your own LC Meter and start making your
own coils and inductors. This LC Meter allows to measure incredibly small
inductances making it perfect tool for…(design added 08/08/08) |
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VHF/UHF Prescaler - The recommended Prescaler is ridiculously simple. It
consists of just one IC, a TV tuner prescaler, the Philips SAB6456A, which can divide
by 64 or by 256. This chip is widely available both new and in the surplus
market at much lower prices than conventional divide by 10 prescalers. |
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VHF/UHF TV Modulator - Simple oscillator that generates a frequency in the
VHF or UHF region. The oscillator is modulated with the video signal and the modulated
carrier wave thus generated is fed into the TV set's aerial input via a cable. Then
all that remains to do is tune the TV to the correct frequency. |
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Video/Audio Wireless Transmitter - Television signals operates as two
separate transmissions. One for the video and the other for sound. And just like our
project, two different devices are going to be built. |
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Waveform Generator Demodulates FM Signals - 10/10/96 EDN-Design
Ideas.....The circuit in Figure 1 uses the phase-detector signals of a precision
waveform-generator IC to perform FM demodulation. In a standard application, the IC's
phase-detector input and output synchronize the chip's output frequency to that of an
applied signal. If the signal is FM, you can extract the demodulated signal from the
phase-detector output. The waveform generator..... [Design Idea by Doug Vargha,
Maxim Integrated Products, Sunnyvale, CA] |
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WBFM TX V7 - The circuit is identical to the V7 VHF FM Transmitter but with
a few small additions. TR1 (BC547) is an inverted Hartley oscillator which based upon
an inductor fabricated on the PCB. This makes it megga-stable, and setable.…
[from Harry Lythall's website] |
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Wide Band RF Amplifier for 10MHz-500MHz Input - This paper describes an RF
amplifier circuit which is suitable for the frequencies between 10MHz and 500MHz.
These kind of amplifiers are called wide band amplifiers.(07/07/07) [Author is Yilmaz
Kalafat, PE1PYJ] |
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Wireless PLL Stereo FM TX with LCD - Now you can use your MP3 Player to
listen your favorite tunes through any FM stereo receiver. Wireless FM transmitter
wirelessly connects portable music players to your car or home stereo quickly and
easily. Just plug the FM Transmitter into the headphone jack of your MP3 or any audio
source including iPOD, PDA, CD Player, Cassette player or connect it to your PC or
laptop computer. Tune your card stereo or receiver to the clearest FM frequency, and
enjoy your digital music with full sound and convenience. |
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