This hack is about rewriting the firmware of PLL FM transmitters based on AVR microcontrollers to add more functionalities. They’re commonly available on eBay from various sellers and for prices ranging from $40 to $80, depending mostly on the RF output power. If you don’t know if a similar transmitter is based on an AVR […]
Enhancing An FM Transmitter’s Firmware using ATmega48 Read More »
An LMX1601 Phase locked loop, a discreet FET VCO, and an AVR micro controller combine to make a stable, easy to use monophonic FM transmitter that includes a an audio activated switch that turns the transmitter on only when its being used. Notice: Before operating a radio transmitter, find out what kind of transmitter operation,
A Low Power PLL FM Transmitter using LMX1601 and ATtiny2313 microcontroller Read More »
The parts to the right of the green capacitor are the FM radio transmitter. The parts between the 8 pin DIP and the transmitter are the resistor matrix. One capacitor, C5, is mounted on the back of the board, and one other capacitor, C11, had not yet been installed. It was later installed just below
A Simple FM Stereo Transmitter using ATTINY12 microcontroller Read More »
