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Ground Pole Antenna
Posted on Thursday, May 20, 2010   •   Category: Antennas


This Antenna is most widely used all over the world. For example, when you see a police car it has a transmitter with Ground Pole Antenna The body of car serves as ground). It accepts load from 50 ohm source and has larger power output than Half-Wave Dipole Antenna.


TV Transmitter with Audio
Posted on Sunday, May 16, 2010   •   Category: Video


TV transmitter consists of of the two sections: video transmitter and audio amplifying. Both of them actually is transmitters. The main one generates video carrier while the smaller one generates the exact 4.5 (5.5 in some countries) MHz FM audio carrier. When it is supplied to the main section, the combination generates the audio carrier that is the total of the video frequency plus 4.5 MHz (this is the same in the US but different in other countries: 3.5 in the UK, 5.0 in Italy, 5.5 in Australia and so on: see the channel plans).


2W RF Amplifier For 24/23 CM
Posted on Thursday, May 6, 2010   •   Category: FM Transmitters


This page describes TX ATV Transmitter for 23 cm with output adjustable from 100 to 250mW.


RS232 Serial to USB Converter
Posted on Thursday, May 6, 2010   •   Category: USB Circuts


This is simple RS232 Serial to USB Converter that doesn’t need any further explanations. You can use it for any projects that might need it. Diagrams for USB and DB-9 female connectors are provided.


Wireless Temperature and Humidity Sensor with USB
Posted on Thursday, May 6, 2010   •   Category: AVR


This project is based on obdev's RemoteSensor example and their firmware-only USB implementation; the main change is the replacement of the analog sensors with a Sensirion SHT11 digital temperature and humidity sensor.


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