Owon Oscilloscope Battery

I wanted a battery pack for an Owon PDS5022S oscilloscope, but didn't want to pay the $70~80 (yikes!) for the one that Owon sells.

Some poking around shows that the scope consumes around 1Ah, charges at around 8.5v 300mA when on AC power and turned on. The original batteries are rated 7.4v 8Ah. It looks like an ordinary 2S lipo can be used, so I gave it a try...

DSO Nano Clone

I just saw these at DealExtreme:



They appear to have an mmcx connector instead of the 3.5mm that SeeedStudio uses. I wonder what else is different inside?

They're selling the probe/battery-less version for only $55 USD shipped. The full version is 70 USD or 72 USD (not sure exactly what's the difference). The prices are definitely tempting.

I'm thinking of getting the cheap probe/battery-less version, but I wonder how easy would it be to find or make those mmcx probe though... It's the first time I've seen one of those.

AVRISP mkII - USB powered target

I was using an Altoids 9V-to-5V tin can regulator to power a target AVR under AVRISP mkII, but I thought it would be nice if I could simply use the 5V from the USB.

I found some examples using Google. Here's what mine ended up like...

DSO Nano Surgery

My DSO Nano came with a crooked 3.5mm socket. It worked, but there was quite a bit of friction from the plug rubbing on the case.



I wasn't too sure about opening up a new Nano, but the problem was annoying enough, and in the long run, it probably wasn't good for the socket or the PCB, so I disassembled and attempted to fix it...