DC DC converter circuit 12 volts input 15 volts up output power 2 amps converter circuit MC34063A Step-Up and Inverting switching integral can be used.
General characteristics of DC / DC converter circuit;
Input voltage: 10 .. 14volt
Output voltage: 15 volts 2 amps
Yield: 80%
The coil used in the circuit can be used in the output filter core in the computer power supplies to be wound 30 turns from 0.8mm wire R1 Resistance 0.1an 5w.