Re: [CAD_CAM_EDM_DRO] re:Getting Parallel port to run relay

----- Original Message -----
From: <lanebarr@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, January 27, 2005 10:07 PM
Subject: [CAD_CAM_EDM_DRO] re:Getting Parallel port to run relay


>
>> Any thoughts on damage to computer?
>>
>> Any pointers on assessing computer damage?
>>
>> Hard to believe there isn't a plug and play device just for this,
>> but have had no luck finding anything.
>>
>> First cuts looked surprisingly good and had High hopes. Depression
>> is now setting in quickly.
>>
>> Any advice greatly appreciated.
>>
> Well it sounds like you toasted your printer port. Go to the BIOS and
> disable it. Plug in a replacement printer port. If you have ISA it will be
> surplus if you have PCI it will be about $25-$35.
>
> To start with always use a plug-in printer port for prototyping. If you
> fry it you can take it out and replace it.
> Once the boards are built, mounted, tested, heatsinked, faned, tested
> ....(well you get the idea) then you can hook up to the internal port.
>
> You might want to avoid the game port at first.....programming it is a
> little harder. And you have plenty of signals on the printer port. Add
> another if needed.
>
> Breadboard your circuit and work back from the relay
>
> Simulate the printer porrt with a ttl gate (they are tougher than CMOS)
> from the 7400 family.
>
> only hook to the computer after everything works for a few days.
>
> good luck!!
>
>
>
>
> Lane Barry
> Electronics Tech/ Network Engineer/ Computer tech/ Webmaster
> IT Manager/
> 321.637.7516
>
>
>
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