Re: [CAD_CAM_EDM_DRO] Analog Opto Isolator?

Hi Roger,

The DigiSpeed-GX will take a 0-5V input and convert it into an isolated 0-5V
output. Is that the sort of thing that you are after.

http://homanndesigns.com/store/index.php?main_page=product_info&cPath=1&products_id=21

If you want to email me, with a bit more about the voltage you are measuring,
I may be able to suggest other solutions.

Cheers,

Peter.

vrsculptor wrote:

> Hi,
> I'm messing with a very basic RC EDM (Jon Eleson's) and want to
> measure the voltage drop across a resistor using a micro (coridium
> Armite) with an analog 5 volt input to sense the spark gap. The EDM
> voltage is adjustable so I can't use a fixed resistor network to keep
> the sense voltage within 5 volts. I need some form of isolation to
> protect the micro from over voltage on the sense line after adjusting
> the EDM voltage. I don't need anything automatic as I can manually
> re-adjust a pot on the sense line to get the voltage back into range
> after adjusting the EDM voltage. I'm looking for something simple.
>
> Any suggestions? Is there such a thing as an input voltage tolerant
> analog opto-isolator? An i2c A/D with isolation and over voltage
> protection?
>
> Roger
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
> Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
>
>
>
>
>

--
------------------------------------------------------------------
Web: www.homanndesigns.com
email: homann@...
Phone: +61 421 601 665
www.homanndesigns.com/ModIO.html - Modbus Interface Unit
www.homanndesigns.com/DigiSpeedDeal.html - DC Spindle control
www.homanndesigns.com/TurboTaig.html - Taig Mill Upgrade board