On 1/2/13 3:01 PM, Tim wrote:
I am in the process of building an audio preamp using valves and I am
using nixie tubes to indicate the volume control position. I am using
two nixie tubes to indicate the volume and they are being multiplexed
via a PIC and 74141.
My question to you fine folk is how should I provide power to the nixie
tubes. I have two options available to me:
Regards,
Tim
Tim,
If you can afford the extra four pins on the PIC and another 74141, then
you can run the tubes direct (non-multiplexed) and not worry about it.
If you will be multiplexing them, then the power supply will not conduct
the noise to any noticeable extent. You will need a high anode resistor
value, so you can insert a simple two-stage RC low-pass filter (10K
series, 0.1uf polyester shunt) between the power supply and the anode
resistors to eliminate noise from the anode power.
You will want to be careful about mounting the display unit away from
the input stage of the amplifier, to prevent radiated noise from getting
into the input stage where it will be amplified.
--
David Forbes, Tucson AZ
--
You received this message because you are subscribed to the Google Groups
"neonixie-l" group.
To post to this group, send an email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit https://groups.google.com/groups/opt_out.
