Joseph Near wrote: > > Simple and small solution: powertrends PT6302A. > I looked at the website. It doesn't tell how big it is The PT6302A is a very small ISR (integrated switching regulator) in a 12 pin SIP (single inline package) format. This means that it is a single row of 12 pins. It's about the size of an eraser. > and...how do you hook it up? Connection is very simple, there are pins for input (from your battery or other power source) and pins for output (to wearable and peripherals). There is one other requirement per the data sheet, adding a 100 MFD electroytic capacitor. You can find these at radio shack. Please take a look at the data sheet at www.powertends.com (which is now a texas instruments site). I chose to mount the PT6302A on a small peice of permanent (soldered) breadboard to make wire attachment easier. Take a look at Steve's website www.eyetap.org for more detail. Please use a multimeter and test the output voltage before hooking up to anything to be sure. Note that I came across a couple of bad PT6302As that pushed out 11 volts (always use a multimeter before attaching!) > Also, how do you put this in a case? There is a zillion different ways. I have my regulator in a small plastic enclosure separate from the CPU along with a GPS receiver and microcontroller. But I could have put it in the case with the CPU. I have my regulator mounted on the permanent breadboard and glued it in with a hot glue gun. This may not be ideal for heat dissipation but it seems to work fine. > I was planning on using an advantech pcm-5822 and a 2.5" HD, in a single, > small case. It would (hopefully) fit in a large pocket (like a cargo pocket > hehe). Then the sonys would be in another case with the powertrends. So...is > this the way to go about it? Do some experiments and figure out what works for you. It really doesn't matter how it's laid out as long as the connections are right, and ventilation is allowed. -- Doug
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