Re: [CAD_CAM_EDM_DRO] Wall Wart for a Gecko

Man, I'd hope the Geckos would have onboard voltage regulators. A 7805
and some capacitors would go a long way toward not blowing out the
optoisolators.

Most electronic devices have an operating range for each of the inputs,
including power. Something that's got a voltage regulator on it will
typically allow a range from a couple of volts above nominal to many volts
above nominal. If the range on the Gecko is 5 +/1 0.1 volt, I definitely
wouldn't use a 6V source.

But again, it would suprise me if there was no regulation on board.

Tom

On Wed, 21 Aug 2002 JanRwl@... wrote:

> In a message dated 21-Aug-02 14:58:04 Central Daylight Time,
> kellys@... writes:
>
>
> > If you were to use a wall wart to get the +5 VDC supply from what
> > size would you use? like a 6 volt 300 mA type or what
>
>
> Kelly: Whew! What part of "5 VDC" do you not understand? "6 volt 300 mA
> type"??? Let's start from the beginning: "5 VDC" means FIVE Volts Direct
> Current. In High School, I learned that 6 is MORE than 5. Besides, not
> ALL "wall warts" are regulated output, and many of those "6 volt" kinds put
> out "peak rectified" to low loads. The current-IN to these Gecko inputs draw
> only 8 to 16 mA each. So, you might-well get 8 or 9 VDC from a cheapo
> NON-regulated wall-wart, drawing only 16 mA, and that MIGHT (probably?) smoke
> the opto-isolator inputs to the Gecko. I say "might", because they are
> beautifully engineered and might be "derated" sufficiently to be (nearly-)
> idiot-proof.
>
> Be very careful with such! Though fine stuff, the Gecko drives I have seem a
> bit pricey for non-government contract components, and I'd hate to read of
> someone blowing one because he used a cheapo (no, that's NOT a country!)
> wallwart to supply the input-current!
>
> Lotsa luck! Jan Rowland, old troll
>
>
> [Non-text portions of this message have been removed]
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