The diodes are a good idea but be sure to use low leakage parts such as the BAS70: 4nA per diode at 5V Vr. The 7441 drivers already have pull-ups intrinsic to their design. Without the diodes, the pull-ups would feed current from all logic-1s of the counters to the VDD and then the ground of the 7441s.
jt On Nov 21, 4:26 pm, threeneurons <[email protected]> wrote: > > Amusingly, I was thinking the same thing, but I think the diode cathodes > > should face the counter > > (anodes towards the 74141 inputs). I might go with 4.7k pull-ups, but it's > > not critical. > > > - John > > Yes, the way John orients them... Brains getting soft in my old age ... -- 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.
