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There should be absolutely no connection between live or neutral to ground,even through a capacitor unless it is specifically class Y rated and a very low value. An ioniser will find its ground reference through the mains supply. In this design the entire side connected between neutral and ground will be pointless. There is a reason the traditional ioniser design just had the multiplier between live and neutral.
Build a better RGB LED controller.
Make a hackable LED ornament.
Make a simple LED tester.
Hi. I was wondering if an opto-isolator would be able to cope with fastest speed of the PWM?
You would need to do some software programming for this. Search arduino OTG RGB LED. You can set the color of an RGB LED using a phone's OTG port (uses the micro USB as a host) and sends serial commands to an arduino. At this point you might need to make a mod for the android OS that creates a virtual notification LED as part of the phone's hardware, and an app that spits out serial commands over USB based on what this virtual LED is doing.
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