This is a simple FM transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio. The frequency can be tuned from 88 to about 94Mhz and the range is about 200 feet. It is extremely easy to build and is therefore a good, useful beginner project.With some modification, I create my own version of FM Telephone bug complete with stripboard layout. Theoritically, the frequency range is... [ more ]
This is a nice PLL FM transmitter with LCD display, PLL generated by TSA5511 I2C synthesizer controlled by PIC16F84 microcontroller. Output fequency can adjust from 88 to 108 MHz with 50 KHz steps.This very stable FM transmitter based on TSA5511 synthesizer from Philips. Frequency is performed with three buttons through PIC16F84 microcontroller and displayed on single line 16x1 LCD.With best of 2SC1971 final amplifier circuit design... [ more ]
This transmitter project will show you how to build a mini broadcasting device that can transmit an audio signal up to a quarter mile to any FM receiver. It's easy to build and a good learning experience and best of all - it's free!Having a range of up to a quarter mile, it's great for a house security system, baby monitoring device or simply a listening gadget that you can place anywhere!C4 is a small, screw-adjustable, trimmer... [ more ]
