On 5/15/2012 3:21 PM, Matthew wrote:
2. I'm planning to code the LED version as closely as possible to the final
tube version, so will be multiplexing them. Looking at Ray Ws design, it
looks like the digits are multiplexed, with only one driven at a time...
could/should/shouldn't I multiplex the individual segments too? Not sure if
the tubes would be bright enough?
Matthew,
I have an early FLW board, which was not multiplexed. I think it would be a
better choice to do than multiplexing, for both tube life and code simplicity.
I'd recommend that you use common DIP-packaged parts for the board. The 74HC595
8-bit serial shift register and SN75468 100V 7-way high voltage driver are
low-cost, readily available parts that would be easy to use and program.
I'd also recommend that you go with John Taylor's tiny power supply module
unless you care to get into power supply building, in which case Nick DeSmith's
design is an excellent choice.
Using the above parts will ensure that you spend most of your time working on
software rather than hardware.
--
David Forbes, Tucson, AZ
--
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.
