I got a powerful LED which can draw up to 1 amp at 4.2volts.
The Regulator I have runs off of 12volts knocking it down to 4.2volts which works but the linear regulator (LM317) gets very very hot doing this So anyway would this work?...
1 Lithium Cell (4.2v) I wire this to the 12Volts Cell with a 5watt resistor and limit the current from the 12volts battery to around 1000ma Stick a Diode on the end of that to force 1 amp into the 4.2volt cell
now the - + terminals of the 4.2cell I connect that up to the LED and I'm thinking if it draws the same amount of current as the 12v is supplying via the Resistor, would that not eliminate the heat from using a Regulator?...
(I'm thinking the Current has to match the current being consumed by the LED or i'd risk OC or Venting the Lithium?....)
Would this work? believe me I'm not going to try it if my reasoning is out
The Regulator I have runs off of 12volts knocking it down to 4.2volts which works but the linear regulator (LM317) gets very very hot doing this So anyway would this work?...
1 Lithium Cell (4.2v) I wire this to the 12Volts Cell with a 5watt resistor and limit the current from the 12volts battery to around 1000ma Stick a Diode on the end of that to force 1 amp into the 4.2volt cell
now the - + terminals of the 4.2cell I connect that up to the LED and I'm thinking if it draws the same amount of current as the 12v is supplying via the Resistor, would that not eliminate the heat from using a Regulator?...
(I'm thinking the Current has to match the current being consumed by the LED or i'd risk OC or Venting the Lithium?....)
Would this work? believe me I'm not going to try it if my reasoning is out