Re: [CAD_CAM_EDM_DRO] Wall Wart for a Gecko

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


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