Electronic – 555 AM transmitter


I looked on instructables and I found an interesting(at least for me) AM transmitter made with a 555 timer which acts as the oscillator:http://www.instructables.com/id/555-AM-Transmitter/ Is this idea feasible?Will it work?

Best Answer

No, it's rubbish: -

enter image description here

Look at the circuit - where do you connect a modulating input (such as a microphone or signal generator) - if you attached its output to an antenna it would be creating so many harmonics the whole of the AM broadcast band would be corrupted in the near vicinity.

Accepting that it's likely illegal to connect an antenna to the circuit there are far more practical circuits around like this: -

enter image description here

Taken from here. Or, there is this FM (not AM) one: -

enter image description here

Taken from here. Just Google "Simple AM transmitter" and look at the images of circuits you get. Choose one that is within your capabilities and go to the source page for instructions and help.