Hi, I know its been a while since I opened this thread, but I finally have had a chance to play with one of the supertex chips - the HV5522. Naturally, it isn't working out too well at the moment! I am trying to drive it with an Arduino Uno. Firstly, I tried just using the 5V levels directly (yes, I know), just to get some life out of it. It didn't really work in that the results weren't what I was expecting - I am using some LEDs as test objects. They light up but, not when I expect them to. Could be my software. Could be the levels. I guess it could be both. So I tried to use a level shifter I had (a MC14504B), and I am seeing some weird outputs from it. Essentially the LE signal is being shifted as I would expect, 0 in goes to 0 out, 5 in goes to 11 (because my Vdd is around 11V) out. However the clock and data are not being shifted the same way. They are: 0 in is shifted to 6 out, 5 in is shifted to 11 out. I have tried swapping the pairs of LE with, for example the pair of CLK, but I still see the same behavior. I tried adding 100K pull-down resistors to the CLK and DATA outputs, but that had no effect. Is the HV5522 pulling the 0V up to 6V somehow?
Here is a screenshot of my old Tektronix oscilloscope - literally I took a photograph of it, I cleaned the screen up a bit for its photographic debut! It shows DATA and LE. I set the bases at different levels, DATA is channel 1, LE is channel 2: <https://lh3.googleusercontent.com/-69Y3lM-8tV0/WRng5vVgrNI/AAAAAAAAAlM/VGEGP0nxUC8VglEv0N0Xnmp0f9d3CAUpACLcB/s1600/IMG_1471.JPG> On Tuesday, February 21, 2017 at 6:51:23 AM UTC-5, Paul Andrews wrote: > > Hi, > > I was following up on a discussion elsewhere which mention the HV5530 as a > control chip for Nixie tubes. This has 32 outputs and 12V digital control, > so it has some drawbacks. There are many other similar chips, in particular > the HV3418, which has 64 outputs at 180V and 5mA, with 5V digital inputs. > So, at least from that perspective, it looks like a very good match for > driving 6 nixies. > > I don't know enough to understand the rest of the data sheets for these > devices, so I don't know how to determine their suitability for driving > nixies. Can anyone help? > > Thanks > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/1092f756-bf8f-4ecc-9484-b6b88ab686e5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
