Re: Simple Parallel Port controller

--- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...> wrote:

> Scott Riddle wrote:
>
> > I am looking for some help to use my parallel port to turn off

and on a

> > small relay switch. The device I want to control will shut off

automatically

> > after 1 cycle but it needs a 1 second ON switch to activate it.

What I am

> > doing is turning a small motor on and it will turn one revolution

and then

> > stop when the cam lobe on the pulley hits the switch lever to

stop it. I

> > need the computer to turn the relay on to start the motor moving.

The motor

> > is just a plain motor 12V not a stepper or servo. I will have the

final

> > drive slowed way down with a pulley so the switch cycle will take

3-4

> > seconds. I have seen some simple controller boards for small

servo motors

> > for about $50 but All I need is a Off and ON switch. I would

appreciate any

> > help.
>
> You can get DC solid state relays. Digi-Key sells them, for

instance.

> You can connect the SSR to the parallel port directly. It works

best

> if you supply +5 V from a spare disk drive power connector, or from

the

> game port (pins 1,8,9, and 15 are +5 V). Use the parallel port bit

to

> drive the pin you are using to ground to turn on the LED in the SSR.
>
> Jon

Can you give me more info on how to use the game port? I would
appreciate a wiring schematic if you have one.

Thanks
Scott