Can some one please tell me what are the advantages and disadvantages of using a toroid inductor(hand made) for the inductor of buck or boost converter?
Both kinds will work (but select the grade/material for the purpose and frequency).
A few examples of the pros and cons...Toroid:Advantages:
Cheap to produce. Magnetic field closed in he core.Disadvantages:
Laborious to wind. If material and frequency isn't carefully selected, you risk core saturation (which is bad
)Pot cores and similar:Advantages:
Can be had with an air gap (or be gapped with paper/plastic sheet to avoid saturation - some gapped cores have an adjustment screw to fine tune the gap). Easy to wind (hence cheaper and easily automated). Comes in various shapes and in lots of different AL
Price. Comes in two or more parts that need to be held togeth with special clips or glue.
In your photo #2, There's one pot core (middle one in the top row). Middle row leftmost is a "pigs snout" used for RF transformers and right under that is something I cannot determine; either a licorice with a pin through the middle, or a ready wound coil maybe
The rest of them seems to be nothing but shielded versions of otherwise open cores.
The above is not preemptive, but since it's your
school work, I should leave a little to you