Finally success! After wiring the right connections to the right signals I
finally got it working as I wanted. A 0 bit is off, a 1 bit is on. POL is
pulled high and BL is pulled high. I can blank the tubes (leds ATM) by
pulling BL low, or dim them by using PWM.
Here is some code for the Arduino (uno). CLK is connected to pin 13 (SCK),
DATA IN is connected to pin 11 (MOSI) and LE is connected to some output
pin. Pin numbering in the comments is for the PLCC package:
void display() {
SPI.beginTransaction(SPISettings(SPI_CLOCK_DIV2, MSBFIRST, SPI_MODE1));
// Output alternating on and off. Highest output is transfered in
first
SPI.transfer(0xAA); // HVout 32 through 25 = pins 17 through 10
SPI.transfer(0xAA); // HVout 24 through 17 = pins 9 through 2
SPI.transfer(0xAA); // HVout 16 through 9 = pins 1 and 44 through 38
SPI.transfer(0xAA); // HVout 8 through 1 = pins 37 through 30
digitalWrite(LEpin, HIGH); // Transfer data from shift register to
latches.
digitalWrite(LEpin, LOW); // Latch data
SPI.endTransaction();
}
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
>
>
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