Re: LPT1

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "stcnc2000" <thinkcnc@w...> wrote:

> Hi to all,
> I installed a new PCI parallel card, but the card is putting out 3.3
> Volts. How can I get it up to 5 Volts output?
> Thanks for any help.
> Bob

If your are handy with a soldering iron buy yourself a 74LS541 octal
buffer chip. Get your VCC (chip voltage) from the PC +5. It will take
the 3.3 to +5 and give you up to 24ma of sink current (active low) per
signal. Will handle up to four axis of Step and direction. Chips are
less than 2 bucks. The 541 is a good chip because the input pins are
directly opposite the output pins so wiring is simpilifed.