I am trying to use a MC34063 switching regulator to step-up 5v to 12v.
I have wired it up as shown below, I think its the same as the datasheet.
But I only get ~4 volts out.
I know the capacitors I am using are greater than what is in the datasheet examples, but its the closest I can get. I do have capacitors that are below the datasheet values too, but those don't seem to make a difference.
(I am eventually using this on a battery, but currently the 5v I am using is from a power supply (stable constant DC current))
What am I doing wrong? What can I try next?