I'm not sure if I'm breaking any rules here by posting this, since it's of a somewhat commercial nature, so, moderators, please delete if inappropriate...

Anyway, I have a Web page HERE explaining how to make a simple sound card shutter tester. On another forum I noticed that there is still some interest for this kind of a gadget - and that, even though the gadget itself is very simple, there are still people for whom this is rather complicated to make

Anyway, a friend of mine has built an improved version, which does not require a battery (it's powered from the computer USB port), has an integrated light source, and provides more precise measurements, even on higher speeds (above 1/125).

Now, since this friend of mine has recently become unemployed, I thought I'd help him by putting out a "feeler" to see if this gadget of his would generate any interest, so perhaps he could make a few of those for sale, since a shutter tester is not really an "off the shelf" item anywhere in the world, AFAIK...

A short explanation for those who haven't seen anything like that: the gadget is used to measure shutter speeds, and requires a computer. The tester has a jack that's plugged in the computer sound card (into microphone connector), and a sound software (e.g. freeware "Audacity") is used to "record" the signal from the tester. After clicking the shutter, you measure the length in milliseconds between two peaks in the sound software, and you get the shutter speed. Simple, really. You can see the principle on the page linked above...

So, in short, would anyone be interested in a gadget like that, for a reasonable price: I think about $60 would be reasonable, plus postage from Croatia (another $20 or so....)?

I can provide more info, plus photos of the device, and more detailed explanation.

(At the risk of sounding rather corny, I'd like to point out that I'm not trying to make any money from this - I'm just trying to help a friend through some difficult times, by perhaps helping him earn a few bucks... This isn't a full-blown commercial venture or anything like that. Like I said, moderators please delete this if inappropriate...)

Denis