|
|
|
SAA1057 PLL Synthesized FM Transmitter - French. The
functioning of all is provided by a microcontroller from MICROCHIP
"PIC16F84" which provides support for buttons, LCD 2 lines of 16
characters and the circuit pll "SAA1057. The VCO is entrusted to the
transistor Q8 associate of his two diodes varicaps "BB109, a floor buffer
Q7 separates the VHF.....(08/08/08) |
|
Shortwave Bug - Circuit and notes only, no circuit description
given…. [Tony van Roon's circuit] |
|
Simple FM Receiver - With the TDA 7000 you can build an FM radio
with a minimum of components; most of them so easy to manage.....like the
ceramic capacitors that do not require polarization.....and only two
resistors. The components you will employ will be of small dimensions and
low cost. Even the integrated circuit itself, the TDA 7000, is not of
great cost. …..... |
| Simple FM Transmitter Schematic -
There is no thrill like the thrill you get from operating equipment you
have built yourself. If you have never built a project from a magazine
before, let this be your first--you'll see how much satisfaction and fun
you can have!… [Tony van Roon] |
|
|
|
Simple RF Power Meter - Here is a simple set up which will enable them to
measure the out put power of their transmitter. All that they require is a good
multimeter which has a sensitivity of 20k ohms/4 Watts which is adequate for low power
transmitters. Many beginners trying out their skill with QRP TX,.....(circuit added
08/08/08)_ |
|
Single Chip FM Transmitter - Simple to build once chip FM Transmitter that
requires only 3, 5V to operate. This 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.....(added 8/08) |
|
Small FM transmitter SMD - (electronic design added 6/07) |
|
Solar Powered FM Bug - There are many miniature FM transmitter (bug)
circuits online, this one is unique in that it runs completely on solar power. No
battery is required. As long as the sun is shining on the PV panel, the circuit will
transmit. The bug is useful as a "remote ear", and can be used for anything from
listening birds to surveillance work. The mic preamp and oscillator circuits were
borrowed from a common circuit found around the Internet, I added a regulated solar
power supply and an RF amp that extends the range and improves frequency stability....
[G. Forrest Cook] |
|
Stereo FM Transmitter - AN-543-StereoFMTransmitter-Analog Device Application
Notes (app note added 10/06) |
|
Subcarrier Adapter - Listen to those hidden FM transmissions …. [Tony van
Roon's circuit] |
|
Synchronous oscillator converts audio video to FM - 07/22/99 EDN-Design
Ideas.....The synchronous oscillator (SO) and the coherent phase-locked synchronous
oscillator (CPSO) are universal multifunctional networks that track, synchronize, and
amplify as much as 80 dB; improve SNR by as much as 70 dB; and modulate AM, FM, and
FSK signals..... [Design Idea by Vasil Uzunoglu, Synchtrack, Gaithersburg, MD]
|
|
Tabletop FM Radio - (circuit added 07/07/07) |
|
TDA7088 Receiver - Site has annoying popups. The electronic diagram of
the monophonic FM receiver made with TDA7088T is shown on Pic.4.12. If built with SMD
components it can be placed in a matchbox, altogether with two button-type batteries.
The operating principle of this device is given in the.....(circuit added 08/07/06)
|
|
Telephone FM Transmitter - This FM transmitter attaches in series to one of
your phone lines. When there is a signal on the line (that is, when you pick up the
handset) the circuit will transmit the conversation. In particular it will radiate
from the phone line itself. It is a passive device, there is n..... |
|
Telephone Transmitter FM - Receive telephone conversations on any FM radio
with this neat little device…. [Tony van Roon's circuit] |
|
Three Transistor FM Radio Bug - Electroinic circuit design…. [from Harry
Lythall's website] |
|
Transmitter FM 45W with valve - designed by Kyriakos Kontakos
(schematic / circuit added 05/06/07) |
|
TV Transmitter - A VHF band TV transmitter using negative sound modulation
and PAL video modulation. This is suitable for countries using TV systems B and
G…. [Submitted by David Kwaku Celestin] |
|
Two Transistor FM Transmitters - This circuit will flash a bright red
LED (500 mcd as an attention getting device or fake car alarm. Componten Values
are not criticl and transistors may be used. Flash duration is determined by
R2…. [Bill Bowden's circuit |
|
Two Transistor FM Transmitters (Rob van der Weijden) - A compact 2
transistor transmitter for use at VHF frequencies…. [Andy Collison's circuit] |
|
TX200 High Quality 200mW FM Transmitter - Here is the latest and greatly
improved TX200 VFO/VCO FM transmitter. The most versatile transmitter to date that can
be turned into high fidelity stereo PLL based 200mW FM transmitter. It is a perfect
circuit for transmitting your music around the house and yard.....(8/06) |
|
TX300 300mW FM Transmitter - 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….(08/06) |
|
TX500-500mW FM Transmitter - The TX500 is a simple to build 500mW FM
Transmitter. It consists of three blocks; modulator / oscillator, two stage 500mW VHF
amplifier and LED based power meter. The TX500 allows to transmit audio signals to FM
band at frequencies from 88 MHz to 108 MHz.....(8/06) |
|
|
Custom Search
