Hi guys, is there any way of generating harmonics? Harmonics are
generated by the non-linear loads such as the light dimmer. Besides
light dimmer, are there any more circuitries that can be built that can
produce harmonics at the output?

One more question is that, normally harmonics affect the main power
supply. How should I analyze this distorted signal? Should I get the
waveform from the main power supply?

Hope you guys can give me some opinions and guidances. Thanks.

What frequency range do you want harmonics for?. There is a several
order difference of magnitude between power line harmonics and those in
the MHz range, ad totally different ways of generating them.

H. R.(Bob) Hofmann

hei. lets say the fundamental frequency is around 50Hz.. so the
harmonics should be 100Hz,150Hz, 200Hz.. and so on. BEsides that, i
think a normal circuitry that can produce a distorted signal is good
enough. Please advise. thanks

A pure sine wave does not contain harmonics. As the harmonics are added, the
waveshape changes. At low levels of harmonic content or distortion, it is
difficult to detect the change in waveshape with an O scope. Instruments
such as a spectrum analyser, a wave analyser, or a distortion analyser are
better suited to detecting the harmonics. There is software such as Spectra
Lab and others that will turn your computer and sound card into any of these
instruments. An easy way to generate harmonics is to clip a sine wave with a
diode clipper, producing a square wave. Spectra lab also contains a
generator capable of generating multiple tones. The levels at each tone are
adjustable, therefore you can set the harmonic content at any frequency.
ooi_yw wrote in message
. com...
hei. lets say the fundamental frequency is around 50Hz.. so the
harmonics should be 100Hz,150Hz, 200Hz.. and so on. BEsides that, i
think a normal circuitry that can produce a distorted signal is good
enough. Please advise. thanks

Sounds like you want -all- the harmonics.

Clipping gets you only the odd harmonics, so 50, 150, 250, etc.

A triangle wave is also only odd harmonics. Triangle wave is a
symmetrical gradual rise and fall with sharp peaks.

For all the harmonics, you want a sawtooth wave. That's the one where
the rise is gradual and the fall vertical or vice versa.

http://www.answers.com/topic/sawtooth-wave