Inside a Pound shop car-USB charger (with schematic)

I'll warn you in advance, that if you want more from a USB charger than a measly 500mA then this one isn't for you. It might have uses for powering low current devices though.

This came from a generic pound shop as opposed to one of the higher profile ones like Poundland. Now I want to get a recent Poundland car-USB charger and compare them.

The one good thing about this charger is that it shows how minimalist the circuitry can be in a mass produced device when they can justify using a dedicated buck converter chip.

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