Re: Generator under $200

January 7, 2008

Here is an example of a cost-effective product for personal research.

It's a recent release by Velleman, incorporating new and relevant

features over their pre-existing models (sometimes sold as " Rife

generators " ). Check out the specs and see if it suits you.

In contrast to the also cheap PC sound card approach, this module

provides an output level which is usable, in certain modes, without

further amplification, as well as a much more versatile DC-2MHz

frequency range. The advantages over a Chinese-made bench function

generator of similar price are: 1) the ability to generate complex

waveforms and, more significantly for us, 2) sequenced playback of a

user-programmed frequency list.

I presume the " 10V output " is across the + and - 5V outputs. Of

course, this can be boosted with an external amplifier, if desired.

But it needs to be a specialized " wide band " type for anything

outside of 20Hz-20KHz. Perhaps someone could work up a simple circuit for this.

For safety, I would only operate this, and the host laptop, on

battery power. eg. both disconected from the power grid.

Please note the above is not a recommendation for any specific type

of use, and I am not associated with Velleman or their resellers.

Nielsen

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