Inside a tiny USB-C phone torch

This little torch is designed to plug into your phone's charging port and be powered from the phone.
The main advantage of this is that it provides a more directional beam than your phone's camera flash, and will also operate with the phone off.

I wasn't expecting much circuitry in this. Just a little control chip, transistor and resistor to limit current through the LED. But I was wrong. It has a complex two transistor toggle switch and a current regulated LED driver.

The complex circuit and tiny PCB made this a very difficult device to reverse engineer.

Here's a link to the item on AliExpress (not a sponsor).
This is an affiliate link, but that will not affect the price you pay.
https://s.click.aliexpress.com/e/_c3rVIFRb
It should typically cost less than £2.


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