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Topic: daisy chaining 74HC595's (Read 2 times) previous topic - next topic


... you get told different things by different people and when you look at tutorials ...

That's the nature of the Internet, I'm afraid. However on the "official" support site (here), you can expert good advice, and if someone does suggest something that may not work, someone else will likely correct it.

If somebody posts garbage here, they usually get corrected in no time (and if you're sensible you'll thank them for correcting you, not start arguing!)

You can't say the same for some random page on the Internet, or even the official tutorial pages on this site (there's some major errors in some of the tutorials and apparently no way to get anybody to correct it).

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)


Quote from: fungus

even the official tutorial pages on this site (there's some major errors in some of the tutorials and apparently no way to get anybody to correct it).

and that's a good way to run an official site/forum? surely there must be a way to correct the tutorials..

Nick Gammon

There are a lot of tutorials in the Playground. Some were written for older versions of the IDE, and prior to some function call changes. Plus, some were written before newer hardware was released and may not mention something like "does not work on Leonardo" or something like that.

Some authors may have moved on, and you can appreciate it would be a lot of work for someone to make sure every tutorial is absolutely correct, for all available hardware, operating systems, versions of the IDE and so on. It's a moving target, after all.

To be honest, I don't understand where all this anger is coming from. In your first post in this thread you said:

so can someone please explain (and show if possible) the right way of doing it as far as pnp's and capacitors go.

What PNPs? Do you mean transistors? There aren't any in the circuit. On the bildr page you linked (http://bildr.org/2011/02/74hc595/) there is no reference to PNP at all.

So, your question doesn't make a lot of sense. And, if I may ask, why not ask at the bildr page? Surely it's not our fault you are having trouble with a circuit on another web site?

Your posts are coming across as very negative. You ask again: "i just want to know where the freaking pnp's and capacitors go! that's all i'm asking for!!! damn..".

Well, swearing aside, again, what PNPs?

Then: "glad i won't let my son join this forum... i can imagine how he would be treated".

Sorry you feel like that. Perhaps find a friendlier forum ... if you can.

In any case, you might want to "let" your son join and form his own opinions.


These were both posted already and clearly show where the PNP and capacitors go.
You can re-draw them in fritzing if you want.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

Papa G

that's not very helpful.. i have 74HC595's from different sources.. i don't know who the actual manufactures are nor am i going to track them down... (like i don't have other things to do)... and honestly, i don't know your skill level, but i'm not going to take advice from someone new who has less posts than i do.. no punt intended.

Fortunately, 74HC devices are supposed to meet certain specifications no matter who the manufacturer is. Therefore, just about anyone's data sheet will do. That may not be true for other devices so if someone tells you to get a data sheet, then it's probably good advice. Nevertheless, it is your responsibility to either look up the data sheet or reveal the manufacturer's name when designing with a part or asking for help with that design... whether or not you're too busy doing other things.

You can take that advice or leave it as I probably don't have enough posts to be relevant. This is the Internet and anyone can have any qualifications they can type but if we're counting, I have been designing and building electronic circuits since I was ten (57 years), and have had a degree in electrical engineering (electronics not power) for 46 years. When I have 15,000 posts I will have skill as well I guess. :)

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