Oldies but Goldies: Nixie Clock

[firatdeveci]

This is my Nixie Tube Clock.
First I want to use USB to get power and communication.

I used STM32F072 48pin series. It has internal RTC and yes, crystalless USB!
I wrote PID algoritm for 5V to 170V converter and bingo, i did it with classical boost converter and around %98 duyt cycle!
For more information please read my entry about that, unfortunately it's Turkish: https://www.firatdeveci.com/gecmise-donus-nixie-clock/

Then I wrote 00-99 counter demo! God, Nixies response times are so fast! Look at it!

https://www.youtube.com/watch?v=CRK7wZSlkoE

Then after that I did my first clock with using IN12A and IN12B. Also RGB background led display and buzzer for alarm.
Now i am designing very small nixie tube clock it will be around 4.5x4.5cm and will work with only one vertical nixie.
Here is the video of that and some photos.

https://www.youtube.com/watch?v=oxCw3YPfZU8&t

 

[schmitt trigger]

Congratulations!
VERY BEAUTIFUL project. :grin:

The back-lighting on the Nixies looks awesome.

What did you use for the high voltage drivers??

 

[firatdeveci]

I use microcontroller (STM32F072) to do boost voltage. But this microcontroller works with 3.3V so I use one mosfet driver (TC4427) for driving 200V mosfet. My inductor value is 330uH and output capacitor is 4.7uF/250V. Of course boobst converter diode is 200V schottky.

 

[firatdeveci]

This is my new project!

https://www.youtube.com/watch?v=MqGOwYK5uQI