There are a number of on-line calculators to determine capacitor reactance, for example:
http://www.sengpielaudio.com/calculator-RC.htm Also, if you do use a capacitor make sure you use a class “Y” capacitor; they are designed for use in an AC line. Anything else is a danger and / or fire hazard! Bill From: [email protected] [mailto:[email protected]] On Behalf Of gregebert Sent: Saturday, January 16, 2021 10:44 PM To: neonixie-l <[email protected]> Subject: [neonixie-l] Re: Neon flickering flame bulb in overdrive At 60 Hz, a 0.27uF capacitor has 10K ohms of impedance. You would need to use a non-polarized cap that can handle the ripple current, something under 12mA. I cant vouch for how well that will work; it's a non-linear circuit so the capacitor is not exposed to a steady sinusoidal waveform, so it's effective impedance is probably much different. If I have some extra time, I'll run a SPICE simulation. On Saturday, January 16, 2021 at 6:41:38 PM UTC-8 [email protected] <mailto:[email protected]> wrote: We all know the flickering flame candle bulb (if you don't, what are you doing here?) I was wondering if there's a way to get this to glow stable. So I removed the base and found a 30K 1/4W resistor in there (230V model) I replaced this with a 10K 1W model to see what would happen. Well, things happened... It was glowing way more intense but still flickering and after 5 minutes or so I noticed the rich bouquet of brûlante resistance (the resistor was melting and you know the smell...) So I contacted a certain YouTuber for advice and he told me perhaps it would be possible but I need to use a combination of a resistor and a capacitor (with discharge resistor across it) to get higher current with less heat a combination. All good advise (I guess) but I have no idea about capacitor values etcetera. Can anyone help me in the direction to solve this? Thanks in advance -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] <mailto:[email protected]> . To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9a7816d6-25db-4987-955f-510cef627a66n%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/9a7816d6-25db-4987-955f-510cef627a66n%40googlegroups.com?utm_medium=email&utm_source=footer> . -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/001501d6ecd5%245475e510%24fd61af30%24%40gmail.com.
