Medium wave transmitter using only a PIC Microcontroller! (2nd demo: pseudo polyphonic)

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Uploaded by on Aug 8, 2009

This is a MW/AM (1000KHz) transmitter using PIC Microcontroller CCP module generating 1MHz PWM signal with MCW (Modulated Continuous Wave) modulation. Demo music comes from the legendary Mario Bros video game.

The radiated signal is rich in harmonics up to 1Ghz. In this video you can see the 145MHz harmonic being received using a Yaesu VX-2 handheld amateur radio. It's so strong that you can hear the signal 20m away! Take in account that no impedance matching or serious antenna has been used for the demo. It's just a piece of wire to microcontroler's pin, so radiation is very poor, specially at low frequency.

After this proof of concept, i'm thinking on an application as simple and cheap LF RFID transmitter.

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Science & Technology

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Standard YouTube License

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  • Really good job!

  • Now THAT is awesome :-)

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