[neonixie-l] 74HCT595 shift register in DIP package?
Hi all, My reacquaintance with Nixie's is progressing well and I'm looking at experimenting with driving them via a Raspberry Pi. I know this is complete overkill but it makes for a nice experimentation platform and I'm comfortable with Python (so eases the learning curve!). With this in mind and given the Pi's low GPIO pin count, I want to experiment with shift registers and I believe that the 74HCT595 is suitable for driving via from the Pi's 3.3v logic. However, I'm having difficulty finding this chip in a DIP package. Does anyone know of a source of these shift registers in DIP form (or indeed any equivalents)? Many thanks Matt -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/9f062d91-8dea-4061-a24a-325ea5e33b5f%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] 74HCT595 shift register in DIP package?
Thanks all for the replies, Research on the web highlighted a couple of people who say they had trouble driving 74HC595 chips from the 3.3v logic outputs on the Pi however this may well be inaccurate - I am get hold of a few and give them a try. They are easily available from Farnell here in the UK. Thanks for the Digikey pointer - if it turns out that I do need 74HCT's then that's a good option although shipping to the UK is a bit of a killer. Matt -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/-8262369312823280610%40unknownmsgid. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] 74HCT595 shift register in DIP package?
On 29 Nov 2013, at 16:15, David Forbes dfor...@dakotacom.net Matt, You won't have a problem if you drive the 74HC595 from 3.3V also. It works down to 2V! -- David Forbes, Tucson AZ -- Thanks David, I just took a look at the spec sheets and you are of course absolutely right! That'll teach me to believe random stuff I read on the Internet - doh! Matt -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/-5367200587241146022%40unknownmsgid. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] Quick hello
On Wednesday, 27 November 2013 00:14:58 UTC, NeonJohn wrote: On 11/26/2013 06:06 PM, Matt Wetherill wrote: I thought I might try something driven by an Arduino - it'll be quite a learning curve but should keep me busy ;) Hi Matt, Welcome back. Mine may not be a real popular opinion but I do NOT like the Arduino. It's mangled sorta-C++ is a pain, though you can program in C except for some libraries. It's expensive for what you get and quite short on I/O pins. Incidentally, if you just want to play with the Arduino style of doing things, Digikey sells the programmed chip for $5. Just add 5 volts, a TTL serial interface and a clock and there you go. I suggest looking at one of the several chips that have battery-backed RTCs built-in. Get one in DIP format and assemble something on a proto board. BTW, in the next week or two I'm going to be open sourcing (hardware and software) a nifty little count-down counter that I designed for one of our products. It uses the ATmega8515 which isn't a very interesting chip but it has lots of I/O pins which is what I needed. I heavily document my code, especially that which gets released so it would be a good starting point. I'll announce here when I get it finished (boards to be here on Black Friday :-) John Hi John, Thanks for the reply - good to have your advice on this. I'm very new to electronic / microprocessor design - not so bad with coding (I come from an IT background) but I've got a lot of learning to do with regards to hardware :) I guess I'll look out some reference designs and try to build enough understanding to start hacking some stuff together on proto boards. The countdown counter you mention above sounds very interesting - I look forward to reading more about it. cheers Matt -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/ae7f89c9-691f-4ce0-a23e-9e9e25db682b%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] Quick hello
On 27 Nov 2013, at 14:03, John Rehwinkel jreh...@mac.com wrote: If I were you, I'd go a step at a time. Looks like you have all you need, aside from an HV supply. First, I'd grab a tube, anode resistor, and one of those driver chips, and try direct driving a single digit. Then I'd add more digits until I ran out of I/O pins. Then I'd either try a shift register as an I/O expander, or look into a multiplexed design using anode switches. But getting that first digit lit is a real thrill! Here's a pic of my first try with an Arduino: http://www.vitriol.com/images/tech/nixies/nixie-firstlight.jpg - John Many thanks John - sound advice about walking before I run! As you say, I'll find an HV powersupply design / schematic, get it built and work on that first digit! Cheers Matt -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/-6785252363072483065%40unknownmsgid. For more options, visit https://groups.google.com/groups/opt_out.
