On Mon, Oct 11, 2010 at 1:34 AM, Farzin Kamangar
<farzin.kaman...@gmail.com>wrote:
> Hello guys,
> I have a question regarding an output signal on the parallel port. I need
> to know how I can interface an output signal on the parport with for
> instance a signal on a drive for spindle.
> For example I have a 0 and five volt signal on pin-2-out and I want to use
> it to turn spindle clockwise on its drive (inverter). I do not want to mix
> parport signals with the drive signals.
> I think I need some kind of relay (probably an electronic one) to energize
> it with the parport signal and use its contacts for the spindle drive to
> turn it on and run it clockwise, etc.
> Thanks
> Farzin
>
Hi Frazin;
I have used Panasonic's AQW254 for such applications.
It is dual solid state relays in an 8 pin package.
It switches AC or DC up to 400 Volts and requires 1 to 3 MA in.
A cheaper approach is diode driven isolation transistors but they only
switch DC. It all depends on what your inverter controls signals are.
Don
>
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