You really need 5V at low current at the USB interface connector. It's a lot cheaper and easier to buy the solution. I've designed them, but not as small and as inexpensive as an eBay/Amazon/Radio Shack solution. Ours were for ruggedized applications - so couldn't use aftermarket.
There are quite a few USB "power packs" that are Li-Ion based and have charging circuitry and output boost circuitry. (Li-Ion is nominally 4.2V for a single cell, needs a boost for 5V output).
Hope that's helpful. Check out Texas Instruments / Monolithic Power Systems for switchers/Battery management IC's to roll your own.
Or here's one for 1 USD on Amazon. Could be garbage. Most decent ones are like $15. Good luck.
thanks, it could be a good solution, even so looking for more robust options or make in home, thanks
Hi Augusto Salazar,
The battery holder is not installed in FRDM-KL46Z, but the space for the battery holder is reserved on the board.
Please see the schematic for how to the battery is connected, it is at page 5 of below link:
hope it helps!
if the above answer is not your case, then, please update this issue!
If your question is answered, then, please mark this thread as answered and mark the correct answer.
thank you very much, It was useful, look for the components or their substitutes, somthing more, are there some post an example of its implementation?, or some variant whit 5v 9v batteries?, thanks again and see you soon
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