ESETPiP

1-2 km. FM Transmitter The above picture is 1-2 kilometer FM Transmitter with an easy schematic diagram. Input source is an electret condenser microphone and signal gain can be adjusted by using the potentiometer P1. You can easily prepare the PCB by using any PCB editor and apply it to the board by using the ironing method. The coils and the antenna can be designed as a part of the PCB made up of the copper area.  R1=220K R2=4.7K R3,R4=10K R5=100ohm C1,C2=4.7uF Electrolytic C3,C4=1nF C5=2-15pF C6=3.3pF Q1=BC547C Q2=2N2219A P1=25K MIC=Electret Condenser Type The above information is from this link: click here

The above picture shows the basic stages of the commercial transmitter, its blocks/stages and how they are connected with each other. I would like to describe each of these block independently so it could help the beginners see the big picture and thus better understand how transmitters are designed. So lets start! The information that you are about to read is brought to us by:  http://www.electronics-diy.com " Audio Source   Also referred to as Audio Frequency (AF) which usually is around 20Hz-20KHz. This can be either CD player, computer, tape, microphone or just about a...