Circuit Lake » Transmitter

5W VHF TV Transmitter

admin — Thu, 06 Oct 2011 05:13:27 +0000

This VHF TV TRANSMITTER can be used to transmit movies from your PC to your living room, run a college TV station, hotel cable system info pages, re-transmit the TV program you’ve never been able to receive in your valley, cover rural areas of Africa with TV signal from satellite stations and other system [...]

Energy Monitoring Transmitter

admin — Sat, 06 Aug 2011 21:41:07 +0000

This energy monitoring transmitter, known as emonTx, is an Atmega328-based small wireless energy monitoring node. It also fully compatible with Arduino IDE. EmonTx is designed to take inputs from multiple CT sensors, optically from a pulse-output utility meter and from multiple one-wire temperature sensors. The design is based on the JeeNodeV5 by Jean-Claude Wippler [...]

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Telephone FM Transmitter

admin — Thu, 28 Jul 2011 21:07:29 +0000

This project can transmits phone conversation up to 30 metres (100 feet) to an ordinary FM receiver. You can experiment to get greater transmission range away from the phone line by adding an aerial (about 150 cm of 26 gauge wire) to the collector of T2 (see circuit below).To use phone transmitter, you need to [...]

PLL FM Transmitter with PIC-Based Tuning

admin — Tue, 01 Mar 2011 06:02:07 +0000

This easy to build PLL FM transmitter can deliver RF power output typically of 5 Watt. The project uses PIC16F627A to control PLL IC TSA5511 during FM Tuning process. PLL in-lock state status is displayed on LCD or you can check it on LED indicator (when LCD not connected).The transmitter can be used with or [...]

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FM Transmitter with a Single Transistor

admin — Thu, 03 Feb 2011 17:46:33 +0000

Here is the most stable, smallest, and energy saving FM transmitter. It uses only single transistor oscillator, PN2222A. Other high frequency / low noise transistor like 2N2222A, BFxxx series, BC109B, C, and even well known BC238 could work as well. Key to a well functioning, low consumption circuit is to use a high hFE / [...]

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Remote Accelerometer

admin — Tue, 11 Jan 2011 01:43:27 +0000

Remote accelerometer is small device that has a three axis accelerometer and transmit the acceleration values to a remote host. One example of its use is to gather a data from moving object. You can attach the sensor to someone and when he move like jump around, you can use the data to produce sound [...]

FM Wireless Microphone

admin — Sun, 11 Oct 2009 23:50:36 +0000

This FM Wireless Microphone project has good frequency stability and has range over 1 Km (under good conditions). This project features RF amplifier buffer (10dB gain), an AF preamplifier to boost the modulation and good microphone sensitivity. You can use it for guitars and remote control system. This project quite simple to build. The two BC547 [...]