Yes you can read the output of the serial chain then... It's kinda like
connecting your last smartsocket serial back to the Arduino or raspberry pi.
Same idea.
Bill
--
You received this message because you are subscribed to the Google Groups
"neonixie-l" group.
To unsubscribe from this
If I was going to serially connect a bunch of HV5530's, then I would place
a rising-edge flip-flop between each serial-out to serial-in path. This
guarantees 1/2 cycle hold-time margin. Then I would run the last serial
output back into my microcontroller. That way, you can run diagnostic tests
Thanks for your reply, Greg.
The CD4504 is used on all signal lines to the HV5530s.
Initially only the first HV5530 operated correctly.
I did not even think to run clock and data lines in opposite directions. I
did experiment using microsecond delays to slow the data transfers on all
GPIOs
I'm suspecting a hold-time violation on the serial-data input pin.
Some questions:
1. Are you running all supply (12V +/- 10%) and signal voltages (Vih > 10
volts, Vil < 2 volts) within datasheet specs. Some people have reported
using the HV5530 outside these requirements. Since you are using
Continuing the discussion on this old thread...
My 24 digit binary clock design had two, HV5530s separated by 12". The
first in the data series worked perfectly, but the second would not because
of too much noise on the data line. I had two unused level converters on
the CD4504 so I separated
Very nice. I have a board full of IN-12s that would look great lit up like
that.
Ron ...Semper Fidelis...
On Wednesday, October 10, 2018 9:23 PM, Kevin A.
wrote:
Guess what boys, got it working!
I'll post the code once I make it a little nicer to look at. Good ol bit
banging!
--
Some of the chips have internal latches, wouldn't this feature counter
flickering? HV5522/HV5622 seem to be similar to chips you're using,
differing mostly in presence of latches (and some differences in pinout,
too).
W dniu poniedziałek, 8 października 2018 20:31:21 UTC+2 użytkownik
I was surprised, and definitely pleased, that I could get several
Mbytes/sec thru a virtual 8-bit I/O port I implemented on my RasPi
(basically, an arbitrary collection of GPIO pins) to connect to a local
FPGA using the WiringPi library, and compiled-C as the software. No
glitches found on
This is an area that can use some optimization,
I bit banged the 96 bits I needed on the atmega168.
I think it was actually faster than the spi hardware, and I could use any
GPIO pin i wanted.
On a more modern processor using the SPI HW with DMA or fifo would almost
certainly be better.
I did
Interesting. Using SPI on arduino works really well, but I've just realized
that the MISO/MOSI/SS/SCK pins are fixed on that platform(?) - I have been
using ESP8266 for a long time now and go to some lengths on that platform
to avoid interrupts while shifting data out.
I assume that it would
I'm using HV5122/HV5222 in all my applications, and im pretty sure most of
the microchip HV series are identical only differ in voltage and some
protocol types.
They can be driven at 5V, but 'm using a Level Shifter (CD4504) to shift
from 5 to 12V
How ever, one major issue with these IC's is
What Greg says (i.e. output a known fixed pattern), but also try getting it
working for just the first HV5530 in the chain initially. Then expand it to
two. Etc. etc. Do you have a scope? If so, look at the signals on the pins
from the Arduino and from the 12V side of the level shifter. Are
Sounds like this is trending to be a software issue, rather than a hardware
issue, but to be sure I have 1 simple suggestion:
Write a simple chunk of code to display a static number; there are 10 tubes
so I would display 0123456789. I cant tell from the video you posted what
is being displayed
I tried cleaning up the code a little and accounting for the unused bits
corresponding to the unoccupied high volage outputs corresponding to each
HV chip, but it still doesn't work as intended. I feel like im crawling
closer but i'm sure im making a big noob mistake:
#define PIN_LE10
Also, I have a discussion going on in the Arduino forums, since I also
think this is a good place for such a discussion:
https://forum.arduino.cc/index.php?topic=571891.0
On Friday, October 5, 2018 at 3:48:33 PM UTC-4, gregebert wrote:
>
> I'm starting a separate thread on this topic that was
15 matches
Mail list logo
