Hi All,
I'm very new to electronics and am in the process of building my first
clock, so please excuse my ignorance in advance. I have purchased a
power supply and have it wired in series through a resistor to the
anode and on through the 8 cathode of my nixie. Everything lights
nicely.
+181v ----/\/\/\/\-----NIXIE-----ground
The datasheet for my nixie (IN-8) says 2.5ma of current. I read
through other posts here to get a starting ballpark resistor, (12K).
I then wired my multimeter in series between the resistor and the
nixie to measure the current, but my nixie now refuses to light (I set
the measurement dial to ma etc).
+181v ----/\/\/\/\-----multimeter-----NIXIE-----ground
Am I doing something wrong, or is my multimeter interfering with the
circuit?
So I then thought (from my reading of 101 textbooks!); the current is
equal for the entire circuit, I know the resistor, so if I measure the
voltage drop across the resistor I can use I=V/R to calculate the
current, where I am plugging in the voltage drop across the resistor
and the resistor value into V and R.
Is that a correctly thought through approach, or am I making a silly
newbie mistake?
I ended up with an 18K resistor giving me just over 2.5ma @ 181 V.
>From my experiments the resistor that "calculates" out best appears to
visually light the nixie best too.
Thank you for your help and patience.
Steve
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