lilimike
Member
I've been browsing for a while but I can't find enough specific information to get me started.
I want to build an induction charger that will charge two AA batteries in series.
I understand there is a coil in the charger and another coil in the portable device picking up the current by induction but I would like to know how to calculate the coils. I have found Inductor calculators that will give me an inductance value based on diameter, gauge and length but unfortunately knowing inductance value doesn't really help me unless someone tells me what value I need to accomplish my goal.
Also I presume such a device can only trickle charge and does not use feed back to lower the charge as the batteries are close to full charge and I suppose batteries would never get close to full charge in this type of configuration.
This being said I need to be able to leave the portable device (batteries) on the charger for a long period of time and if possible keep them on the charger full time when the portable device is not in use.
Any help, link, example would be appreciated.
Mike
I want to build an induction charger that will charge two AA batteries in series.
I understand there is a coil in the charger and another coil in the portable device picking up the current by induction but I would like to know how to calculate the coils. I have found Inductor calculators that will give me an inductance value based on diameter, gauge and length but unfortunately knowing inductance value doesn't really help me unless someone tells me what value I need to accomplish my goal.
Also I presume such a device can only trickle charge and does not use feed back to lower the charge as the batteries are close to full charge and I suppose batteries would never get close to full charge in this type of configuration.
This being said I need to be able to leave the portable device (batteries) on the charger for a long period of time and if possible keep them on the charger full time when the portable device is not in use.
Any help, link, example would be appreciated.
Mike
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