HV circuit not runnung correctly

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3 years 1 month ago #7570 by nixie-N00b
hi ian,

i build another board with new components except thr RTC. same issue, thick LED will not come up. could the RTC be the bad part here?

regards, Sven

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3 years 1 month ago #7571 by Ian
If you leave the RTC unconnected, the circuit should still work: The accuracy will be as good as the crystal, (i.e. not great) but it should still work.

There is something more fundamental going on here.

No parts are too hot?

The 5V is stable?

Can you send a photo of the test wiring and the board, maybe I can spot something.

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3 years 1 month ago #7572 by nixie-N00b
Hi Ian,
the 5V is still stable, after factory reset the HV comes up and hungs around 170 / 135 V (as you wrote it will be normal when no Tube is connected).

Just the thick LED won't glow / fade ... nothing gets hot or do something "not normal".

the test-wiring is this:
SV2 Pin 1 (GND) -> one pin of the Button and the negative pin of the thick LED
SV2 Pin 3 (BTN) -> other pin of the Button (for factory release)
SV6 Pin 4 (this who is connected to R19) -> positive Pin of the thick LED

The RTC is connectes as written: GND to GND (SV4 Pin4), VCC to VCC (SV4 Pin3) SDA to SDA (SV4 Pin2) and SCL to SCL (SV4 Pin1).

when i'm home i will take some pics of the board with wiring, may this will give another "look at the things" ;)

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3 years 1 month ago #7573 by nixie-N00b
hi Ian,

i guess i got it: (stupidity as it's best :silly: or: the awkward moment when you see it ) ...
after re-minding the test wiring of the thick LED i was cross-reading your manual and see:

"The LED should be wired up with the longer lead to pin 4 of the CONN_FRONT (SV2) connector and the
shorter lead to pin 4 of the CONN_LED (SV6) connector."

i wrote:
"SV2 Pin 1 (GND) -> one pin of the Button and the negative pin of the thick LED
SV6 Pin 4 (this who is connected to R19) -> positive Pin of the thick LED"

awwww ... awkward. i will connect it again right and will test again. just a feeling .. but i think now it will work.

the "main" problem was the HV was not high enough, after factory reset it was resoled, i mean.

sorry for wasting your time with this, as written, a'm an electronical N00b in this theme.

regards, Sven

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3 years 1 month ago #7574 by Ian
Ah OK, that's what I wanted to check in the picture.

Don't worry, I'm just sorry that the instructions were not clear enough.

If there is anything else, just say...

Ian

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3 years 1 month ago #7575 by nixie-N00b
Thanks ^^
Your manual is clear ... i must just learn to read all of it.

but when you ask this way: i just want to use the INS-1 Neon-bulbs as separator (in a later clock).
how can i connect then correctly?
in the manual you wrote: "For each neon, place a 56-100k resistor in series, and drive from the HV output on the power connector on the board."

this means a resistor per neon and this connected to the HV, so i can do 2 resistors and 2 neons parallel or as a series ...?
may you have a circuit schema / draw of the current path for this?

regards, sven

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