I'm building 3no NIXIE tube clocks. I've worked out most of the code including how to decipher the DCF77 signal! ands set the clocks
However the PCB's I bought multiplex the tubes in pair ( 3 pairs - 6 tubes in total)
The board takes a pre programmed PIC (inc 4MHZ res). This is bit I'm replacing with a 28X. The instructions refers to the duty cyle of the tubes; these are
full brightness on- 600 microsecs/ off 233microsec
low brightness on - 119microsec / off 680microsecs
I know the new 28x1 chips can have microsec delays, but I've bought the standard 28x chips.
The programme will be small and I can build some of the code into the off cycles
Any thoughts on how to implement these short delays.
Regards
Tim
However the PCB's I bought multiplex the tubes in pair ( 3 pairs - 6 tubes in total)
The board takes a pre programmed PIC (inc 4MHZ res). This is bit I'm replacing with a 28X. The instructions refers to the duty cyle of the tubes; these are
full brightness on- 600 microsecs/ off 233microsec
low brightness on - 119microsec / off 680microsecs
I know the new 28x1 chips can have microsec delays, but I've bought the standard 28x chips.
The programme will be small and I can build some of the code into the off cycles
Any thoughts on how to implement these short delays.
Regards
Tim