Re: [CAD_CAM_EDM_DRO] Parallel Port/Relay Problems... more

Ok - I'm not an electronics type by any stretch, but I *am* trying to learn.
I've heard the SOURCE/SINK reference many times. Could someone please
explain this nice and simple-like? Sorry for the doltish question, just
trying to understand....

Thanks,

Matt


-----Original Message-----
From: Alan Marconett KM6VV <KM6VV@...>
To: CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO@yahoogroups.com>
Date: Wednesday, December 05, 2001 12:51 AM
Subject: Re: [CAD_CAM_EDM_DRO] Parallel Port/Relay Problems... more

>Hi Chris,
>
>I must have missed the original question. Are you trying to control a
>solid state relay, or a relay from a pin on a parallel port? And your
>software has an Mcode to use? If you'll afford me a guess, do you have
>a 1K pullup to +5v on the pin? and are you trying to SINK current, not
>SOURCE it? a 220 ohm resistor connected to +5 and in series with an LED
>makes a good test probe. You should see the respective pin control the
>LED of all is working.
>
>This will allow you to divide the problem in two! Makes it easier to
>debug.
>
>HTH
>
>Alan KM6VV
>
>
>Chris Clough wrote:
>>
>> Ok - so I went and got all new components and rebuilt it twice now today
>> - I'm using the schematic of off Tim's site - I built it, had two EE's
>> look at it, and said that's the way it is on the page so... what's my
>> next option?
>> Any help - PLEASE :(
>> -Chris Clough
>> Xtech Engineering
>
>
>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@...
>Moderator: jmelson@... timg@... [Moderator]
>URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>bill,
>List Manager
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>