This is essentially a Q & A tutorial set - as provided for in SE rulez.
I am trying to build a Power Bank* on my own.
Can anyone assist me in designing a circuit or suggest ones which may form a good starting point.
I have tried searching for the circuit online. I have found circuits which use SMD components. For reasons which seem good to me [tm] I'd rather obtain information on solutions that do not use SMD devices, if possible.
*The name "Power Bank" or "PowerBank" is common parlance amongst those of about Gen-X on - so much so that they may not realise that it may confuse those with Gen-Q brains or before. So,
The technical name for a "Powerbank" is a boost converter.
A PB is usually a BC designed to operate from a single LiIon (Lithium Ion) cell and to produce 5V output intended to charge a cellphone or similar via a 5V "USB" connection. The target device usually uses a LiIon cell as well so it's essentially part of a LiIon to LiIon charging circuit.