How does this guitar work??

speeDemon · Last edited by speeDemon on Mon Mar 02, 2009 7:46 pm; edited 1 time in total

Heres what a guy did to make an homemade electric guitar,:

Ankhanu

I'm not sure what you're asking. The entire process (save for the basic woodworking) is covered in what you posted.

If you're asking about how electric guitars work, well, they're pretty simple ideas. Essentially, an electric signal is formed in the pickup by induction; the magnet sets up a magnetic field, and the wire around it is like the coil that's used in an electric generator, spinning around to make a current. Difference is that instead of spinning the magnet or the coil, you have a static coil/magnet relationship, and to induce a current, the magnetic field is manipulated (by a steel string vibrating in it, causing it to bend around), mimicking the movement of the coil or magnet, inducing a small electric current.

That small current is sent to an amplifier to make it bigger and out to speakers to make sound.

That guitar is an extremely simple one; you'll almost never encounter a production model guitar with this set up, they almost always include at least one potentiometer to control either volume or tone, and possibly some other tone shaping elements in the circuit (capacitors, resistors, etc). But, it's basically how pretty much any solid-body magnetic pickup guitar is built.

Sphaerenkern

Haha, very nice found! Thanks for sharing. Smile

brokenadvice

Honestly I don't know how this could sound good (if it works at all). The system seems to be using a two stage amplifier, the cassette acting as the first stage, and computer speakers acting as the second stage. The wire wrapped magnet is picking up the signal from the strings, and transmitting it to the circuits in the cassette player normally meant to amplify the magnetic signal from the tape. I think this guy is missing a few crucial steps, and the tutorial would be much better if there were pictures of each step.

sum12nv

The number of vibrations per second is called the frequency which is measured in cycles per second or Hertz (Hz). The pitch of a note is almost entirely determined by the frequency: high frequency for high pitch and low for low. For example, 110 vibrations per second (110 Hz) is the frequency of vibration of the A string on a guitar. The A above that (second fret on the G string) is 220 Hz. The next A (5th fret on the high E string) is 440 Hz, which is the orchestral tuning A. (The guitar A string plays the A normally written at the bottom of the bass clef. In guitar music, however, it is normally written an octave higher.) We can hear sounds from about 15 Hz to 20 kHz (1 kHz = 1000 Hz). The lowest note on the standard guitar is E at about 83 Hz, but a bass guitar can play down to 41 Hz. The orginary guitar can play notes with fundamental frequencies above 1 kHz. Human ears are most sensitive to sounds between 1 and 4 kHz - about two to four octaves above middle C. Although the fundamental frequency of the guitar notes do not usually go up into this range, the instrument does output acoustic power in this range, in the higher harmonics of the most of its notes.

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