On our Electronics Communication subject, our project was to create both FM and AM transmitter. The FM (Frequency Modulation) transmitter plugs into the audio output of audio devices and converts the audio output into an FM radio signal, which can then be picked up by appliances such as car or portable radios. It is called as an FM Transmitter due to the fact that we are dealing with the frequency modulation. An AM (Amplitude Modulation) is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. AM works by varying the strength of the transmitted signal in relation to the information being sent. For example, changes in signal strength may be used to specify the sounds to be reproduced by a loudspeaker, or the light intensity of television pixels.
Here is the schematic diagram for the FM Transmitter:
The value of the inductor used in this circuit is basically 200uH. The inductors value changes the frequency range. You may change the value of the inductor by using the frequency formula shown below:
As for the AM (Amplitude Modulation), here is the schematic diagram:
Here are some pictures of my Transmitters:
(This is only the AM Transmitter. I wasn't able to take a picture of my FM Transmitter. So sorry for that.)
PROJECT MADE BY:
KIRK BENEDICT P. MACARAEG
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