Ardjan,
The common term for this is 'anode driver'. The anode driver controls the tube
anode, so it needs to operate at +180 volts relative to the Arduino. Designing
such a circuit is tricky.
I made some clocks many years ago that used a Motorola microcontroller instead
of an Arduino, but the hardware is basically the same. The anode drivers are Q1-Q12.
http://www.cathodecorner.com/nc600ab.gif
You can substitute MPSA42 for the ZTX458, and MPSA92 for the ZTX558.
Also, ignore the power supply. It was built with a custom-made transformer that
I used in my scope clocks.
On 6/23/2016 11:31 AM, Ardjan Doci wrote:
Sorry for the late response but I'm afraid i can't follow you. I searched for
high end nixie drivers but I couldn't find it (or I missed it).
Can you explain what you wrote in an easy way? Thanks.
Il giorno mercoledì 22 giugno 2016 18:34:33 UTC+2, marta_kson ha scritto:
The schematic on taht link is CRAP! You will blow some components if You
try!
It is imperative to have a resistor between the collector of NPN and base of
the PNP. Otherwise it will end up in a short circuit when the NPN conducts.
Google around for high end nixie drivers and You will find correct
schematics.
Use one high end driver for all the tubes if You don't intend to multiplex
them. Each driver puts load on the HV and is bad. Releases heat and puts
extra strain on the HV-supply. The total current for 6 tubes and two small
neon bulbs will be well below the limit for the transistor. Select a
resistor at least two times what saturates the transistor according to worst
case on it's data cheet. If left unsaturated it will become quite hot and
break.
Use a fairly low PWM frequency. Without mux 100Hz is more than enough. Too
high just makes the driver hot.
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