Step 1: Materials
The list ... honestly is huge. (I am joking).
Surely we need 6 nixie tubes.
1 x power supply for nixie tubes (~ 170v dc from 5v boost converter).
6 x chip driver for nixie tubes (74141 or K155NA1).
3 x chip shift register (74hc595).
1 x atmega 328.
8 x LED blue.
Some push buttons, a simple power supply 5v-2A dc.
Last we need a RTC (Real Time Clock) DS2231S
Step 2: Power - Boost Converter 170v Dc
A simple circuit with the IC 555. A 170v booster from the 5v to feed the nixie tubes.
1 x 555
1 x bc547
1 x IRF740
1 x coil 100uH
1 x diode UF4004
1 x 4u7/200V
1 x 470u/15V
1 x 2n2
1 x 100p
1 x 220K
1 x 2K2
1 x 10K
1 x 1K
1 x Pot. 1K
Step 3: RTC - Real Time Clock DS2231s and Temperature Ds18b20 PCB
Step 4: Connection 74141 and Nixie Tube PCB
We make the right connections, based on the manuals and testing the nixie tubes.
Step 5: 74hc595 Shift Register Connection PCB
We make the right connections. Based on manuals.
Step 6: All Together
And we finally connect everything together. We also connect the atmega board and after we have programmed it, we are ready!
Step 7: Delicate Box
Finally a box is needed. But it should remind something of an old age ... something retro. That's why we made this fantastic wooden box.