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
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.
Big Clive
2024-08-13 14:37:25 +0000 UTCLooks like you can use it as a taser.
Curtis Hoffmann
2024-08-13 06:25:51 +0000 UTCI 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?
Ramast
2024-08-13 04:52:18 +0000 UTCA "Cambodian flashlight" sounds like a euphemism for...something else.
Adam McKnight
2024-08-13 04:51:01 +0000 UTCA flickering LED whilst charging would drive me up the wall.
Andrew Donaldson
2024-08-13 04:09:50 +0000 UTCHe got it purely to take apart.
Big Clive
2024-08-13 04:08:53 +0000 UTCAwkward when Vince asks where it is🫢
RonNona
2024-08-13 04:08:05 +0000 UTCIt's very crude and basic compared to a modern USB charged lithium flashlight.
Big Clive
2024-08-13 04:06:14 +0000 UTCSeems useful, not going to put it back together?
RonNona
2024-08-13 04:02:11 +0000 UTC
