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I decided a while ago that i wanted to build a nixie tube clock. However, unlike a lot of the other online projects, I wanted to do this with entirely 1970s logic chips. |
| Ohh! Thats going to look pretty. Are you going to build a prototype before buying those expensive tubes. |  |
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Yes! My initial design right now is just using standard 7 segment displays.
In short, it uses a 32.768khz clock signal to derive the timing needed for the clock.
This signal is divided by the 74HC4020 and then further by the 74HC32. The signal is then sent into the 74HC390 counter chips which is then fed into the BCD to 7 segment decoder. In order to reset the numbers, there is a series of logic gates which will trigger the reset pin when the appropriate digit is reached. |
| Looks pretty cool. I hope you'll let us know when theres some progress! |  |
