Re: [CAD_CAM_EDM_DRO] Gecko power requirements

Hi Weyland,

Sounds like you're going to hang the regulator circuit on the MOTOR
supply! Not the best choice (it does work, with caveats). We want to
get the MOTOR supply isolated from the PC's signals and supply. If the
PC drives the Opto-isolators, then there is no direct connection from
the PC to the MOTOR supply. However if you regulate off of the MOTOR
supply, then there is a connection (more or less)!

That's why getting 5v from the keyboard port, joystick (game) port, or
one of the disk drive power connectors is usually recommended.

Using the MOTOR supply, it may never fail. But if it does, you could
fry your PC's parallel port, or worse. That's why opto-isolators are in
a lot of driver designs (protection)!

Yeah, I'm definitely infected! Wife thinks she's immune heh heh heh!

HTH

Alan KM6VV


Weyland wrote:

>
> From: "Alan Marconett KM6VV" <KM6VV@...>
>
> > Hi Weyland,
> >
> > You shouldn't get it FROM the parallel port, Try the joystick port or
> > the keyboard port. Even a wall-wart.
> >
> > Alan KM6VV
>
> LOL!
>
> Thanks Alan, but I think I stumbled across the solution last night.
> They got these here things called "regulators".
> I just learned m'self 'bout'm.
> Ya put yer voltage in one side, and the desired voltage comes out the other
> side.
> Whooda thunk it?
>
> Anyway, looks like I can built another little circuit board with
> two of these things (one for 5V and one for 12V) and I'll be fine.
> (looks like an under $20 project)
>
> I think I might be gettin' the hang of this stuff finally...
>
> Problem is, I think I've been infected with whatever's goin' 'round.
> Just when I think I've finished something (like the power supply)
> another idea or discovery pops into view and I'm off and runnin' again.
>
> The kitchen table isn't visible anymore, and the wife's gettin' worried...
>
> Weyland