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Walkie talkie (2) transmitter

Below you see the block diagram for the walkie talkie transmitter.

Transmitter block diagram

The carrier oscillator is crystal controlled to guarantee sufficient stability. It is much easier to create a frequency stable carrier by means of a crystal than with an ordinary LC oscillator. The latter would require carefull selection of components and […]

Walkie-talkie (1)

Lately my 6 year old son has gotten interested in walkie-talkies. Now, I could go to the nearest toy-store and buy something but where is the fun in that? Since, he is getting more interested in technology it would be nice to design something that he can, at least to some extend, help me […]