Not a video yet (spoiler)
Added 2020-12-01 05:11:14 +0000 UTCIn a way, this is a bit of a spoiler for the video in progress.
I've de-potted a Chinese module and it's NOTHING like I was expecting.
Those 1206 capacitors should be fairly high voltage (630V?) with an unexpected capacitance of between 85nF to 95nF, and the diode packages will have two diodes each, with one pointing from the left pin to the middle pin, and the middle pin to the right pin.
I'm not immediately aware of an A7 dual diode package rated for at least 600V.....
It does appear you can get 1206 caps rated at 1kV and 2kV but usually just in the low tens of nF.
Real spoiler below...
It's a small 220V ioniser module for a fridge that puts out positive and negative ions from two different carbon fibre emitters (next to their series 10M "safety" resistors.
The negative side has just 6 multiplier stages (12 caps and diodes), while the positive side has lower output with just four stages (8 caps and diodes).
The power is connected to the two central top and bottom pads, with a 200K resistor to add further safety and limiting.
This thing does appear to be ionising at low level, but the supply current is insignificant at 50uA - 0.01W.
Comments
A7 is a BAV99 diode 70V 200mA according to eBay listings.
Nuts 'n' Proud
2020-12-04 02:22:05 +0000 UTCI am intrigued and sincerely wish to know more!
Michael Thompson
2020-12-03 08:42:04 +0000 UTCYeah, that was awesome!! The spark gaps! That looked so bad ass. Pure evil.
MrTridac
2020-12-01 20:01:17 +0000 UTCOoh, I get it. Non-symmetric bipolar voltage multiplier. Neat.
MrTridac
2020-12-01 19:56:10 +0000 UTCWow that's cool!
2020-12-01 13:46:19 +0000 UTCEven with minimal electronic experience, I start to recognize a component pattern for high voltage. Have you seen the thing Mehdi just built? Not so much corona, more like lightening.
Jim
2020-12-01 12:41:03 +0000 UTC220 V but 1% of 1 W, give me 500 of them stat 😁😂
Cerity
2020-12-01 09:31:56 +0000 UTCVery cool. I have several tiny (less than 2" square, 1/2" deep) German "bipolar" ionizers. I haven't depotted one yet but expected to find a controller and inductors. Didn't think a voltage multiplier for ionizing voltage could be that small.
Bill Kerr
2020-12-01 08:59:20 +0000 UTCYes they are very low 150-330pF
Mike Wynne
2020-12-01 08:22:13 +0000 UTCYes, but I'd imagine they aren't even close to 100nF. Almost certainly less than 10nF.
Kean
2020-12-01 07:49:08 +0000 UTCI am surprised the first thing that came to mind, it was a voltage multiplier, when I saw the image. I guess you can teach old dogs new tricks because while I admit my knowledge is still left wanting, I am learning!
Michael Wellman
2020-12-01 05:32:45 +0000 UTCHaha, try finding an HV 1MΩ that isn't a TH component for that.
NightshadeLenar
2020-12-01 05:31:14 +0000 UTCI’m still looking for the little triangle ozone fridge generation units 😉
Zane Revai
2020-12-01 05:20:10 +0000 UTCAwesome 😎
Zane Revai
2020-12-01 05:20:10 +0000 UTCI have just bought 250 high voltage 1206 caps for a job, 3000v, they were $2.25 each. Not cheap Clive
Mike Wynne
2020-12-01 05:17:33 +0000 UTC
