Rick
AFAIK the angle sensing is done with an accelerometer chip which utilizes a weight suspended by a network of strain gages. Of course this is all in nano-scale and built into a tiny little chip. As the chip is tilted the strains change accordingly and you can calculate the change in tilt. A similar design is used in chip based gyroscopes. For those who fly RC helicopters these have been revolutionary.
JohnW
--- In gingery_machines@yahoogroups.com, "RG Sparber" <rgsparber@...> wrote:
>
> David,
>
> "far easier to buy than it is to make"
>
> It all depends on your goal. I'm sure you are not advocating that we all go out and buy finished gingery machines ;-)
>
> The protractor you found does look interesting and is certainly a great price. Looking at the display it seems to show 28.35 degrees so is about as accurate as my method. I wonder how they do the angle sensing.
>
> Rick
>
> -----Original Message-----
> From: gingery_machines@yahoogroups.com [mailto:gingery_machines@yahoogroups.com] On Behalf Of David Patterson
> Sent: Monday, September 05, 2011 9:20 PM
> To: gingery_machines@yahoogroups.com
> Subject: Re: [gingery_machines] new article: A Low Cost "Digital" Angle Gage
>
> http://www.ebay.com/itm/Electronic-Digital-Protractor-Goniometer-Angle-Finder-/140595954307?pt=LH_DefaultDomain_0&hash=item20bc2c0283
> no need to reinvent the wheel by making it more complicated. far easier to buy than it is to make.
>
> Dave Patterson
>
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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