i have a few of these- http://www.ebay.com/itm/Hot-LM2596-...248?pt=LH_DefaultDomain_0&hash=item1c367bf788
They work great to hold a specific voltage, however they seem to have a noisy output. When I plug my phone in to charge, I get noise out the headphone jack.
This is even when the step-down controller is running off batteries! I also have touchscreen issues when the charger is charging the batteries, and the phone is plugged in, but that is not much of a worry (happens a lot with android devices).
I would just like to be able to charge my phone off these batteries (14v lithium pack) without causing a noisy audio output... What would be the easiest/cheapest way to do it?
thanks!
They work great to hold a specific voltage, however they seem to have a noisy output. When I plug my phone in to charge, I get noise out the headphone jack.
This is even when the step-down controller is running off batteries! I also have touchscreen issues when the charger is charging the batteries, and the phone is plugged in, but that is not much of a worry (happens a lot with android devices).
I would just like to be able to charge my phone off these batteries (14v lithium pack) without causing a noisy audio output... What would be the easiest/cheapest way to do it?
thanks!