Agreed. Most of us use the 74141 for circuit simplicity.. if it is complicating your circuit, then it's a no-brainer to get rid of it. There are lots of alternatives.
-Adam On Sun, Jul 31, 2011 at 1:17 PM, jb-electronics <[email protected] > wrote: > Hi, > > I have no idea about the interface of 3.3V and 5V, sorry, no experiences. > > > The next step would be to add a 5V-regulator just to feed the driver. >> In that case, how/do I need to protect the outputs of the >> microcontroller? I have looked into the 'standard' schematics for TTL >> and it seems to me that a TTL input with a 5V supply would tend to >> pull its input high, possibly destroying a 3.3V output. Is series >> resistors sufficient or are transistors needed too? >> > > If you plan on going through so much trouble, just replace the K155ID1 with > ten transistors, they will work on 3.3V as well. The MPSA42 is available in > SMD as well, this way you will not lose too much space. The K155ID1 is not > that great a chip that it is absolutely necessary to tweak every circuit > into compatibility with that oldtimer, if you ask me ;-) > > Regards, > Jens > > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to neonixie-l+unsubscribe@** > googlegroups.com <neonixie-l%[email protected]>. > For more options, visit this group at http://groups.google.com/** > group/neonixie-l?hl=en-GB<http://groups.google.com/group/neonixie-l?hl=en-GB> > . > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
