Fitting neon colon separators. IN-14 All in one Arduino clock

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1 year 4 months ago #9631 by oaksh
Hi all This might be another dumb question unworthy of an answer but here goes.
I have 4 x neon separator lamps that I would like to make use of.
I know I have to connect P1 “170V” to “COM” and use 120k resistors in R38 and R39 but what "wattage" should the resistors be?

Tony

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1 year 4 months ago #9632 by Ty_Eeberfest
1/4 watt is sufficient. Anything higher would be harmless overkill. 1/8 watt would probably be okay if that's all you have on hand, but if you're buying resistors I'd suggest getting 1/4 watt.

Look into it later when the dust is clearing off the crater.

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1 year 4 months ago #9633 by BS_Jim
A quick note. Depending on the type of neon separators you are using, you may want/need to increase the values of the resistors to 220k or even 330k to avoid dimming of the digits when they reach full brightness.

On the two that I've built with IN-1's as separators, I found 220k to be much better.

Jim

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1 year 4 months ago #9634 by oaksh
Thanks for your replys gent's I was going to use the one in this image
Attachments:

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1 year 4 months ago #9635 by BS_Jim
That looks like a standard IN-1. I think you''l like the results of using 220k resistors instead of 120k's. Try them both and use whatever works best.

Jim
The following user(s) said Thank You: Ian

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1 year 4 months ago #9636 by Ian
Agree: I have taken to using a 100k on each leg. For me that is the sweet spot (i.e. total 200k)

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