Hi All,
I have a simple charging circuit for iPhone - basically I take a 12 v supply pass it through a 7805 with a couple of caps and presto my iPhone charges.
Problem is I am using a 7805 and it is rated at 1A - the thing gets really really hot ! - I didn't really want to heat sink it.
My question is - Is it possible to limit the output current somehow ? - This will mean the iPhone doesn't charge as fast, but that is of no concern... I just don't want things to get hot ?
I am also consifering using SM components with an LM1117 which is still rated at about 1A, but really small so the heat dissipated would be too much...
Any help would be appreciated..
I have a simple charging circuit for iPhone - basically I take a 12 v supply pass it through a 7805 with a couple of caps and presto my iPhone charges.
Problem is I am using a 7805 and it is rated at 1A - the thing gets really really hot ! - I didn't really want to heat sink it.
My question is - Is it possible to limit the output current somehow ? - This will mean the iPhone doesn't charge as fast, but that is of no concern... I just don't want things to get hot ?
I am also consifering using SM components with an LM1117 which is still rated at about 1A, but really small so the heat dissipated would be too much...
Any help would be appreciated..