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Showing posts with label Bug. Show all posts
Showing posts with label Bug. Show all posts

Thursday, June 16, 2011

1 Watt simple FM Transmitter with 1-2 km range!

1 Watt FM Transmitter


This is simple 1 Watt FM Transmitter circuit. This circuit will be able to cover 1-2 KM range with a single pole antenna of 20 feet! 


Click on picture  to view the large size

Descriptions:
P1 act as condenser microphone volume level. For FM, coil will be small. Use thin

Construction of Air Core Coil for FM transmitters

Just follow the steps as shown in the following pictures to make the air core coil for your Fm transmitter






                           Click  "Read More" to view details


USB FM Transmitter Circuit for PC and Laptop

Here's a small FM transmitter ciruit for your desktop or laptop to enjoy the movie and music from a distance. This FM transmitter, which is powered by USB, recovers output on your computer or your MP3 player to the relay on the tape FM (frequency 108 MHz). For Assemblying this FM transmitter kit, an electronics hobbyist will have built in about 30 minutes.



Simpliest 2 watt FM transmitter with PCB and details


 USE DIPOLE ANTENNA FOR MAXIMUM RANGE (COULD BE UP TO 10 KM IN GOOD WEATHER). TUNE BETWEEN 88-108 MHz WITH C5. BB-204 COULD BE REPLACED WITH CONVENTIONAL LED (BIG) WITH REVERSE BIAS (NO LIGHT GIVEN IN CORRECT POLARITY). 9V POWER FOR 2KM WITH GOOD SOUND QUALITY AND GRADUALLY UP TO 18V FOR 10 KM RANGE WITH POOR QUALITY OF SOUND.  BEST OF LUCK. 

Saturday, April 16, 2011

Coilless FM transmitter !

 If you are in the problem to make perfect coils for FM Transmitter then this is your time to go on..... See this coil less and easy FM Transmitter.



The RF oscillator using the inverter N2 and 10.7Mhz ceramic filter is driving the parallel combination of N4 to N6 through N3.

1 km. FM Transmitter

Description

This one is a high power long range (use yagi antenna)  FM Transmitter  that provides very good frequency stability in about 1km range and very good microphone sensitivity. It can be used inside guitars, as a part of remote control systems or in other similar applications.

The features said above are achieved by including an RF amplifier stage with 10dB gain and AF preamplifier stage to boost the modulation.