https://stream.echo6.co/videos/watch/325a45ff-3483-4749-a792-e35ae54a79d6 Here in the UK they sometimes use low output ozone generators in public toilets to reduce odours instead of just masking them with aroma dispensers. The idea is that the active oxygen generated by corona discharge oxidises the odours and makes the air smell clean. This device is quite neat in that it allows you to set low, medium or high ozone generation and also has a light sensor to detect the lighting in the toilets so it can operate either continuously, when it's bright (lights on, toilets open) or when it's dark (lights off, toilets closed.) The unit is designed for easy maintenance and cleaning with a single tamper-proof quarter-turn screw holding the lid closed. When unlocked it hinges out and unhooks with the shielded mains power supply (12V DC unregulated) staying on the wall-plate and the circuitry and ozone module coming off with the lid. The ozone generator module consists of a small computer style fan in a removable plastic frame with three contacts on the sides. A common connection for the fan and corona plate, a 12V feed for the fan and a high voltage AC feed for the corona plate. The corona plate consists of a rectangular piece of thin ceramic with a foil pattern on both sides that overlaps in the central area so that when a high voltage, high frequency supply is applied to it a visible purple corona discharge is formed where the current is capacitively coupling from one side of the ceramic to the other. This occurs in lines at the edges of the foil plates. The ceramic corona panel is replaceable, and held in place by springy steel connections. The circuitry consists of an LM358N op-amp for the light sensor and an NE556N dual 555 style timer chip. One section of the timer is used to cycle the ozone generation on and off to vary its output, while the other seems to be driving the power transistor on the ozone plates high voltage transformer. I'm not sure how old this particular unit is. It doesn't look old, but it does have a damaged contact on the ozone module which may suggest why I got it quite cheap on ebay. No problem to fix though. The circuitry almost seems a bit old fashioned, but is probably quite reliable. Wed, 15 Apr 2026 11:20:45 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/325a45ff-3483-4749-a792-e35ae54a79d6 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.