People seem to find my Clock-It website and there's been a lot of interest in my one and two tube clocks. I've got a reasonable set of fades and display modes and I have also got a routine so the cathodes for each tube can be swapped around by the user
People keep asking me if I can supply a kit so I thought it was about time I put something together for other people. So I am working on a small set of modular boards, very much with the home constructor in mind, who tend to not like soldering surface mount parts, so I am trying to avoid their use completely, while designing a compact layout. The DS2321 will be the only surface mount part, which I am going to have space for on the board, but with the option to piggy-back a separate pre-soldered plug-in part which I can supply if people don't feel up to soldering it themselves. The 18F2520 PIC ports I am using for the I2C bus say they are TTL, so presumably they are not open collector, thus my question whether I need any additional pullups. On Sunday, 15 April 2012 17:50:43 UTC+1, Quixotic Nixotic wrote: > > I am driving a DS3231 I2C clock from a PIC's pins. If the logic state of > the pins is always high or low, do I really need pullups on the bus? The > only reason I ask is that space is at a premium. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/ugkKvMeOScwJ. 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.
