I'm trying to make a DC/DC converter from 12V to 5V using a MC34063. I found an old cell phone car charger and removed everything and set it up on my breadboard. I'm getting 5V out but only 0.12A. I checked the car charger before I took it out and it was 5V and 1.0A. I set it up exactly as in this image:
I'm not sure where I could have messed it up.