Autopsy on a faulty night light.
Added 2018-06-06 01:52:51 +0000 UTCI like doing autopsies on things that have failed. It's always interesting to see what failed, what caused the failure, how it can be fixed and improved.
https://www.youtube.com/watch?v=5DT8g4Ry6ZY
While this video was uploading I replaced the capacitor with a 100nF one and a new 1 Megohm discharge resistor. I chopped the resistor feeding the sensor and also removed the individual indicator LED. It now puts out a useful amount of light continuously with such a low power consumption that the Hopi meter didn't even register it.
Comments
Hear hear!
Michael Thompson
2018-06-06 23:33:20 +0000 UTCGood video. I do like these type videos.
2018-06-06 20:41:38 +0000 UTCI get "outdoor", "cats" and "pink" 🙂
2018-06-06 19:28:03 +0000 UTCIf you go to youtube and type bigclivedotcom the two top search suggestions (presumable based on popularity) are "bigclivedotcom doll" and "bigclivedotcom flame" ;-)
Gordo
2018-06-06 17:00:16 +0000 UTCAccording to the family of Clarence Zener, it's pronounced zee-ner.
2018-06-06 14:04:01 +0000 UTCThe zener voltage has to be higher then the series string of 8 LEDs or they wouldn't light. The best way to control the zener temperature could be to half the value of the dropper capacitor to around 300nF.
Big Clive
2018-06-06 13:29:03 +0000 UTCDo you think replacing the 15V zener with a 7.5V would have helped? I imagine the 78L05 might still operate off that low an input voltage (provided the ripple isn't too great). You would think the power dissipation would be halved. Maybe that, coupled with a smaller dropper capacitor could bring the unit back to full operation..
Gordo
2018-06-06 09:30:19 +0000 UTCPronunciation - Zener/Zener - which is correct? I suppose you can use either (or is it either?)
Gordo
2018-06-06 09:17:49 +0000 UTCWhen I made the spoof 100W LED video the hardest thing was trying to say all the names wrong.
Big Clive
2018-06-06 02:33:10 +0000 UTC
