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From: email@example.com (The little lost angel)
Subject: Re: How to make/solder a circuit fast?
Date: Wed, 25 Sep 2002 16:02:56 GMT
Organization: Yes please, I'm quite disorganized & lost at the moment
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On Wed, 25 Sep 2002 11:50:03 GMT, email@example.com (Bob Masta) wrote:
>Just out of curiosity, I'd be interested in what your hobby project
>entails and what sort of DAQ systems you are interested in.
>I'm in the process of converting my DOS-based Daqarta software
>to Windows, and I'd like to make it as useful as possible.
Hehee, it's the same old project I started I think almost two years
back? Maybe I'll never get it completed but I like the fact I've
learnt a lot of things I would never have picked up.
My friend inspired the idea, but he's too busy to bring it to fruition
so I'm the one doing the groundwork for now.
The project involves loading a SMPS with a variable resistive load
(after the non-response trying to get high power resistors, I'm most
likely going with power mosfets).
The spec allows for as low as 50mV ripple and noise, so the scope has
to be able to pick that up at 3.3V to 12V range. And it's defined as
within the band of 10Hz to 20Mhz
Plus the SMPS must remain stable under rapid load changing conditions
up to 10Khz.
I don't care about real time, as the data has to be captured over an
extended testing period with variable loads, then ran through a
But a sound card at best gives me 48Khz (I can't get the 96Khz sound
card), not good enough for noise/ripple analysis but for others pretty
okay. But was in order to use 12V on the sound card is a problem. The
spec allows it to 10.80 to 13.2 range. I haven't figure out a way to
reduce 13.2V to a range acceptable by the soundcard without killing
any 50mV spikes I'm interested in catching.
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