I just looked at the datasheets, those chips multiplex the display. That
means only one 74141 needed per project. The digit select, is active low.
You can use the traditional MPSA42/MPSA92 anode driver, with a simple fix.
No not an inverter. Tie the bases of all the Anode MPSA42s to +5V, thru a
base resistor, an connect the emitters to the corresponding IC output. This
is the common base arrangement, which many seem to ignore.
<https://lh3.googleusercontent.com/-qS2mDsyxaWQ/VYWfyUSnlcI/AAAAAAAAWOA/67QJTOmXtcE/s1600/common_base.jpg>
On Friday, June 19, 2015 at 1:55:55 PM UTC-7, wb9jfr42 wrote:
>
> Has anyone built a clock using MM5309 or 11 chip with nixie tubes
> Using BCD to a 74141 but don't seem to be able to multiplex
>
> i would like to use the chips that i have had for many years
>
> Thanks
> jerry
>
>
>
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