NEW PRODUCT – USB / DC / Solar Lithium Ion/Polymer charger – v1.0
NEW PRODUCT – USB / DC / Solar Lithium Ion/Polymer charger – v1.0. Make your projects to go green this summer with our specialized USB/Solar Lithium Ion Polymer Battery charger! This charger is a very unique design, perfect for outdoor projects, or DIY iPod chargers. We’ve spent over a year testing and tinkering with this charger to come up with a plug and play solution to charging batteries with the sun and we’re really pleased with what we ended up with.
Comes with an assembled and tested charger board, a large capacitor (you will need to solder it in however you would like it to sit), a JST 2-pin cable for connecting up a battery or load, and for a limited time a bonus 2.1mm adapter cable that will convert the small 1.4mm jack to a 2.1mm jack.
3.7V/4.2V Lithium Ion or Lithium Polymer battery charger
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I just made something EXACTLY like this (well, without the automatic current tracking, that’s really nifty, dammit now I want one) with a solar panel I built myself, and your lipo charger.
That is a huge capacitor. 4700 uF. Wow. It seems that the maxim of “when in doubt, put on more decoupling capacitors” holds true here.
hj, the capacitor may be a bit overspecced but if you look at any kind of solar charging system of reasonable complexity there’s a massive cap to stabilize the panel. as we do more testing, future revisions may have a smaller cap.
I wasn’t questioning the design, I’m sure you specced it for a reason, and I would hope I’m the last person to question one of your designs. I’ve just been helping high school students debug mobile robots for 2 weeks, and it seems that when all hope of making their control boards work is lost, adding another decoupling capacitor (up to 1000uF or so) seems to fix the problem. Gotta love the noise injected by two 3-amp stepping motors.