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Title: Problem with nixie driver chip. Post by: slyly on December 14, 2009, 07:02:57 PM The nixie driver chips that came with my kit had varying packages and it seems one of them is giving me trouble. Thankfully I ran to fry's to pick up some sockets before soldering the chips down.
Swapping the chips alternates the tubes that attempt to light up several numbers at once. Could it be possible that the chip labeled 9011 is notched on the wrong side? Or is it more likely that it is just a bad chip? Pictures attached: Update: Don't know if this is related, but A bit of investigation into the k155 series datasheet lists two chips as k155na1/km155na1: A "Dual 4-input NAND gate" and a "Dual OR-expandable 4-input gate". It very likely that I just don't see some sort of logic equivalence Title: Re: Problem with nixie driver chip. Post by: Emblazed on December 14, 2009, 08:39:01 PM slyly,
I will look into this and get back with you as soon as possible. - Emblazed Title: Re: Problem with nixie driver chip. Post by: nonentity on December 14, 2009, 09:33:07 PM The nixie driver chips that came with my kit had varying packages and it seems one of them is giving me trouble. Thankfully I ran to fry's to pick up some sockets before soldering the chips down. Swapping the chips alternates the tubes that attempt to light up several numbers at once. Could it be possible that the chip labeled 9011 is notched on the wrong side? Or is it more likely that it is just a bad chip? Pictures attached: Update: Don't know if this is related, but A bit of investigation into the k155 series datasheet lists two chips as k155na1/km155na1: A "Dual 4-input NAND gate" and a "Dual OR-expandable 4-input gate". It very likely that I just don't see some sort of logic equivalence Hi there, Yes, you have a bad chip, if you'll email me at bradley at robotpirate.com and include your mailing address, I will send you a good one. Thanks! Sorry for the trouble, we'll make it right for you, Brad |