I am building a simple FM radio transmitter

Well, its not so simple for me actually. Thats the project I have chosen for this semester. The most basic circuit I have found on Internet is this:

formatting link

Please tell me what does BC547 doing here and what is its alternative? and please do tell me more about that electret microphone. Thanks

Reply to
Loading thread data ...

The BC547 is a sinple small signal transistor. A NTE123AP is equivalant.

The electret mic requires a battery potential to make it work. It has an internal fet buffer inside which acts more like a current amplifier. Most small capsules will work.


Reply to

internal fet

will work.

The URL gives a good explanation of the circuit too. Interesting little bug....

- Tim -

Reply to

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.