Sajuuk
1
Hello,
A quick question about ... Numitrons and driving them with an arduino.
I ordered 6 IV-9 numitrons from ebay.
I plan to build a clock with them of course.
What I was thinking is to use a 74HC595 and ULN2803 to drive the Numitron. this is for each tube.
That means that I would have 6x 74HC595, 6xULN2803 and 1 328p.
I want to use arduino at 5V and the tubes will be powered from a 3.3V(probably built with an LM317 in lack of other IC) source...
Can you tell me if this plan is ok? Will the numitrons be powered correctly and if I am missing other parts?
Thank you.
Paul_B
2
Sajuuk:
What I was thinking is to use a 74HC595 and ULN2803 to drive the Numitron. this is for each tube.
Don't!
Use a TPIC6B595 - they are designed for the purpose.
(ULN2803s are essentially obsolete.)
Sajuuk
3
Hmm... the problem is I cannot find TPIC6B595 in my region. What other options do I have ?
Paul_B
4
Wait the three weeks to get them from China.
Sajuuk
5
I guess that should be the best option.
Can you tell me what is the difference between TPIC6B595 and TPIC6B595N ?
Thank you.
Paul_B
6
Sajuuk:
Can you tell me what is the difference between TPIC6B595 and TPIC6B595N?
According to the datasheet, the "DW" is the SOIC package, and the "N" is the PDIP - that is, through-hole version.
IV-9 tubes are "essentially obsolete", too.
If you have 2803s and know how to use them - then use them.
Sajuuk
8
Paul__B:
According to the datasheet, the "DW" is the SOIC package, and the "N" is the PDIP - that is, through-hole version.
Ups... missed that line. Thanks.
I took Paul__B's advice and ordered some TPIC6B595's from China. And some other parts also.
Thank you for information.