Re: [neonixie-l] LC-531 and SN74141 problem

Hello, You should not place a linear regulator (7809) between the transformer and the boost switching supply. Go ahead and remove it. The only components I would place between the transformer and the input to the high voltage supply are maybe a 1n4007 protection diode and one or two bypass c

Re: [neonixie-l] LC-531 and SN74141 problem

Hi, First of all *jrehwin* - thank you for a very detailed answer, it is great to know that there are such a great communities in the Internet. I've just resolved my problem thanks to you guys. So what I've done: - changed the resistor to 47k - set HV source to ~170V - add normal diode in 5

Re: [neonixie-l] LC-531 and SN74141 problem

Hi, just tray to change value of anode resistor. 10k is to high for this tube, so finally all digits glow together. Tray this: R=(190V-140V)/0.002A=25k   Regards Krzysztof     Dnia 2012-10-15 18:57

Re: [neonixie-l] LC-531 and SN74141 problem

There is a chance that you have a bad 74141. I would try disconnecting the 74141 inputs from your uC and try grounding them all. Does everything turn off? try pull one of the inputs high and verify that the correct number is lit. I'd do this before proceeding. If the 74141/Nixie circuit works fi

Re: [neonixie-l] LC-531 and SN74141 problem

> That's my first post, but I hope I get an answer to my huge beginner problem. > So, I've recently started to build my own Nixie clock. I have four LC-531 > nixie (Polish production) gathered from old Unitra Multimeter. All of them > works fine when I'm trying to connetct it to HV source (Volta

[neonixie-l] LC-531 and SN74141 problem

Hi all, That's my first post, but I hope I get an answer to my huge beginner problem. So, I've recently started to build my own Nixie clock. I have four LC-531 nixie (Polish production) gathered from old Unitra Multimeter. All of them wor