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Stephen

Member Since 19 Aug 2010
Offline Last Active Jan 24 2014 11:09 AM
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Posts I've Made

In Topic: Cleaning

29 August 2010 - 03:37 AM

Is it also safe to use on the top of the board?

Isopropyl alcohol is used for cleaning flux residue after soldering. It is safe to use on top of the board.

Is 91% good enough?

Isopropyl alcohol is usually specified as 99.x% and not 100% because it is hygroscopic. I think it's best to get the "100%" kind. With a 91% solution, the other 9% might not evaporate and leave residue instead.

In Topic: Cleaning

28 August 2010 - 10:57 PM

The standard solvent used for cleaning PCB is 100% (or close to it) isopropyl alcohol.

In Topic: Best Hobby Oscilloscope

27 August 2010 - 07:17 AM

But what you think about this one? http://www.dealextre...ls.dx/sku.36153

For the price difference, I'd go with the Rigol. It's better value.



I was thinking to buy this one http://www.saleae.com/logic/features/. Is it good enough?

It seems like a really nice package. I've just tried out their software.The user interface is clean and easy to use.
Many comments on sparkfun product page (http://www.sparkfun....roducts_id=8938) are very positive.

In Topic: Best Hobby Oscilloscope

27 August 2010 - 02:27 AM

Any suggestions? I'm looking for something small, and easy to move around since I do my work in various parts of the house where I can get some space. :-)


If you can afford it, I suggest the Rigol DS1052E. It has the bandwidth and sampling rate needed for most microcontroller project. The sampling rate for the DSO nano is often too slow

If you are just going to look at digital signals, you can consider USB logic analyzer. There are a few companies that makes them.

In Topic: SPI

22 August 2010 - 03:28 PM

Are you having data communication isssues on SPI because of this?


I have not tried connecting the SPI to a device yet. I think the extra clock edge will cause communication issues for devices that do not have the Chip Select line connected.

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