Re: [CAD_CAM_EDM_DRO] Re: Clarifications needed - 5 volts

On Sat, 13 Sep 2003 21:21:09 -0000, you wrote:

>Harvey,
>
>A TL783C has a 125V input to output differential. We use them in our
>drives for the low voltage supplies.

OK, That's the one you use, and I do remember the high voltage input
regulators. Obviously, no problem there. That's switching? At that
potential differential, I'd think you'd want it to be.

However, it wasn't clear what regulator he used in his box.

Thanks.

Harvey

>
>Mariss
>
>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Harvey White <madyn@i...>
>wrote:
>> On Sat, 13 Sep 2003 16:01:13 -0000, you wrote:
>>
>> >
>> >I recently boxed up a gecko to make a single axis control for an
>> >experiment I am doing as part of my Phd. I didn't want to have
>extra
>> >cables comming from the PC so put a 5v regulator in the box and
>> >connected this up to the main motor supply. This works fine as I
>> >linked the 0v of the port and supply.
>> >
>> >Stepping 80v down to 5v might have ramifications (such as a hot
>> >regulator) and perhaps this is a bad way to do things as far as
>> >isolation goes??
>>
>> I'm surprised that you found a regulator that could handle the 80
>volt
>> input. it's got to get rather hot at that voltage, if it won't just
>> blow up.
>>
>> I'd get a radio shack wall wart supply, and just wire that in, using
>> the 5 volt regulator... You only need 8 to 12 volts... a 9 volt
>supply
>> would be just fine... Assuming a 7805 type of regulator, 1 to 1.5
>amps
>> is all the regulator will handle, but I do not know the requirements
>> of the Gecko...
>>
>> Harvey
>>
>>
>> >
>> >Graham
>> >
>> >
>> >
>> >
>> >
>
>
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