I am working on my final year design project, and I will be using magnetic power harvesting from a power line to supply a microcontroller. I am thinking of using wires around an iron core, or just purchasing a CT for harvesting energy. If it is the CT, I am a bit confused on its ratings. If the CT is rated for 600:5 A and 5 VA burden, does it mean the rated secondary voltage is 1 V at 5 A output? And therefore a max load of 1 ohm? For the voltage regulator, I am wondering if a device exist that can increase the 1 Vdc input (after rectifying the CT's AC current) to a ~5 Vdc output and regulate that voltage for the microcontroller? Normal voltage regulators such as the LT3029 I was looking at seems to have Vout <= Vin at all times. I will greatly appreciate all the help you guys can give!