Re: [CAD_CAM_EDM_DRO] +5V

meneercen wrote:

>
> Thanks to all who responded. Below is a summary of various
> alternatives:
>
> 1. Al Schoepp: get +5V from keyboard connector/gameport
>
> 2. Doug Fortune: +5V Wall Transformer + tie ground to pin 18 (but +5V
> from PC still better)

I usually get the +5V from the gameport or internally from a
disk drive connector, if none are free, get a "Y" power connector
and then you'll have one.

>
> 3. Dan Mauch: Avoid +5V, use G210/G340
> replace optoisolator with adaptor board
>
> 4. Bob Campbell/Dean: +5V supply on breakout board and tie ground to
> DB25 groundpins.
>
> However, if the serial port is already used to connect to DeskNC for
> windows blackbox, and the only available option is a USB port, is it
> safe to tap the +5V from pin 4 of the USB port?
>

I don't know about the USB (getting a connector for it is probably
problematic), but why not just get +5V from a hard disk drive power
connector (the red is +5V, the yellow is +12V). While you're at it
you can get the ground too (but try not to create any ground loops).


Doug Fortune
http://www.cncKITS.com















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