Thanks, John. I'm a little confused though. I thought that the firing voltage on the INS-1 was 65V and the current was .5mA. Do I not need to worry about reducing the voltage going to the INS-1 down from ~160-180V as long as I address the current issue? Also, is "maintaining" voltage in your reply the same thing as firing voltage.
In other words, let's say my PSU voltage is 180V. Would my calculation be: (180V-65V) / 0.0005A = 230k resistor? Also, in terms of the Power rating needed on the resistor, can you tell me if this is the right calculation. I want to make sure I am not missing anything now to avoid burning out a component later. I wasn't sure if I should be using the current that I am looking for (.5mA) or the current that is flowing into the resistor from the PSU for this calculation. P= I^2 x R = .0005A^2 x 230000 ohms = 0.0575 watts. Assuming this is correct, does that mean I can use anything 1/8W (.125) or better on the resistor. Thanks for the welcome! Best, Dylan On Mon, Nov 21, 2011 at 2:51 PM, John Rehwinkel <[email protected]> wrote: > > My question is related to the INS-1s. I want to ensure that they don't > burn out by getting the full nixie voltage from the arduinix (approximately > 180V). Is this just as simple as picking a resistor with the correct value > and power rating? > > You've got it right. The INS-1 runs on the same voltage as the nixies, > just less current. And the resistor controls the current. > > > Sorry for what I'm sure is a very basic question! > > It's a good question, and that's why we're here. And it can be less basic > than it seems. To calculate the resistor size, you have to subtract the > tube's maintaining voltage from your power supply voltage, and then divide > by the desired current. > > Welcome! > > - John > > -- > 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 this group at > http://groups.google.com/group/neonixie-l?hl=en-GB. > > -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
