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DSO Nano o-scope - Charging Lithium via USB?
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DSO Nano o-scope - Charging Lithium via USB?

by mvsopen on Wed Feb 24, 2010 1:22 am

SeeedStudio and others are now selling the "DSO Nano" a pocket-sized, battery powered o-scope, with color.

Granted, it is rather low frequency (1 meg), but for audio boards and servo hacking, it may be fine, given the list price of under $90. Not bad for a limited featured 'scope with flash card memory:

http://www.seeedstudio.com/depot/micro- ... p-512.html

That's less than a used, uncalibrated scope sells for on e-Bay, and this fits in my pocket.

But several of the reviews that I've found report that the charging circuit for the supplied lithium battery is nothing more than a single resistor connected to the 5 volt pin of the USB port. There appears to be no voltage regulator, charger cutoff, etc. Obviously this saved money during production.

I know nothing about recharging lithium batteries, other than I've hear that LiPos can swell and explode if they are charged incorrectly. The manual describes only a lithium battery. Is this the same thing as a lithium polymer, and is it something I should be concerned about?

mvsopen
 
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Please be positive and constructive with your questions and comments.