bigclive
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Vince's Cambodian flashlight
🕑 Added 2024-08-13 03:55:50 +0000 UTCVince the crew chief on this job often travels around the world with his work. While in Cambodia he bought this light purely for us to take apart.
The charging circuitry is extremely minimalist.
Comments
Big Clive
They rely on the battery being in good health to keep the voltage at a controlled level. A zener diode does not really work well with a lithium cell due to its wide voltage range depending on current.
Curtis Hoffmann
Looks like you can use it as a taser.
Ramast
I see this circuit in many devices including electric zappers and I wonder why not just add a 4.2V zener diode in parallel to prevent the battery from overcharging?
Adam McKnight
A "Cambodian flashlight" sounds like a euphemism for...something else.
Andrew Donaldson
A flickering LED whilst charging would drive me up the wall.
Big Clive
He got it purely to take apart.
RonNona
Awkward when Vince asks where it is🫢
Big Clive
It's very crude and basic compared to a modern USB charged lithium flashlight.
RonNona
Seems useful, not going to put it back together?
