12-volt matrix input->output?
in [Design]
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From: John E. on 4 Mar 2007 04:45 Palindrome sez: > My latest little PIC project controls my central heating, hot water and > heat exchangers. It sits on my LAN, so I can monitor and control > everything from anywhere - even the office. Even your office. *That* I want to see (code, interface, all). I'd learn to program with awl on stainless steel if I could do create project like that as my first (c: ... -- John English
From: Palindrome on 4 Mar 2007 05:04 John E. wrote: > Palindrome sez: > > >>My latest little PIC project controls my central heating, hot water and >>heat exchangers. It sits on my LAN, so I can monitor and control >>everything from anywhere - even the office. Even your office. > > > *That* I want to see (code, interface, all). I'd learn to program with awl on > stainless steel if I could do create project like that as my first (c: ... That sort of code is the last thing that I would show someone seriously thinking of learning. It would be like presenting someone who wanted to understand engine design with an F1 racing car engine. Better to start with a one cylinder gas engine. "Education is a process of diminishing deception", springs to mind. I would suggest that the secret of picking up a programming language is to take very small steps, with the current program always understood and working before moving on to the next. There is nothing more demoralising than taking a "Giant Leap" - only to end up not having a clue as to where you have landed and why.. -- Sue
From: John E. on 4 Mar 2007 13:40 Palindrome sez: > That sort of code is the last thing that I would show someone seriously > thinking of learning. It would be like presenting someone who wanted to > understand engine design with an F1 racing car engine. Better to start > with a one cylinder gas engine. I'd look on your project like an art student looks on the Mona Lisa; as something representing the penultimate of the art, something to aspire to. Come on! Show-n-tell time... "Education is a process of diminishing *self*-deception"? (c: -- John English
From: Rich Grise, Plainclothes Hippie on 4 Mar 2007 16:07 On Sun, 04 Mar 2007 09:45:29 +0000, John E. wrote: > Palindrome sez: > >> My latest little PIC project controls my central heating, hot water and >> heat exchangers. It sits on my LAN, so I can monitor and control >> everything from anywhere - even the office. Even your office. > > *That* I want to see (code, interface, all). I'd learn to program with awl > on stainless steel if I could do create project like that as my first (c: > ... That's another thing about PICcies - they always say, "Use a PIC", without ever saying "THIS IS HOW you 'use a pic'" or providing any kind of docs. I say, anybody who says "use a pic", without providing "HOW" or "WHY" to "use a pic" (e.g., how is it cheaper than an astable multivibrator, which is done THIS way) should be deemed a troll. And, for that matter, "use a 555" fits into the same category. It's as if I, who have 20 years' experience slapping together astable multivibrators, were to say, "Use an astable multivibrator" to some newbie (which each and every single one of us [and the married ones too, <rimshot>] was at one time) who hasn't even heard the term "astable multivibrator". Bottom line, I deem myself much too classy to pull that kind of stunt. ;-) Thanks, Rich
From: Palindrome on 4 Mar 2007 16:53
Rich Grise, Plainclothes Hippie wrote: > On Sun, 04 Mar 2007 09:45:29 +0000, John E. wrote: > >>Palindrome sez: >> >> >>>My latest little PIC project controls my central heating, hot water and >>>heat exchangers. It sits on my LAN, so I can monitor and control >>>everything from anywhere - even the office. Even your office. >> >>*That* I want to see (code, interface, all). I'd learn to program with awl >>on stainless steel if I could do create project like that as my first (c: >>... > > > That's another thing about PICcies - they always say, "Use a PIC", without > ever saying "THIS IS HOW you 'use a pic'" or providing any kind of docs. > > I say, anybody who says "use a pic", without providing "HOW" or "WHY" to > "use a pic" (e.g., how is it cheaper than an astable multivibrator, which > is done THIS way) should be deemed a troll. > > And, for that matter, "use a 555" fits into the same category. It's as if > I, who have 20 years' experience slapping together astable multivibrators, > were to say, "Use an astable multivibrator" to some newbie (which each and > every single one of us [and the married ones too, <rimshot>] was at one > time) who hasn't even heard the term "astable multivibrator". > > Bottom line, I deem myself much too classy to pull that kind of stunt. ;-) > Erm, can point out anywhere in this thread that I have proposed using a PIC for this project, or indeed anything electronic? I wrote purely in response to a self-confessed PIC Virgin, who seemed to want to develop skills in using them. I wrote purely about the learning process. It is extremely unlikely that a PIC will be the most appropriate solution for a one-off project being undertaken by someone who has never used one. It's much the same as suggesting that a "welding virgin" welds two bits of aluminium together, when a pop rivet will do. However, just as spending a bit of time learning to weld aluminium can come useful in project after project after project, spending the time learning to program PICs can pay off, if you have project after project after project to complete. I notice that, in another thread, when I suggested the poster considered using a portable generator instead of an inverter + batteries, you didn't complain about me not describing in detail how to spec the generator. Yet you seem to think that a PIC solution can't be suggested without that level of detail included... There is an advantage to mentioning the possibility of using a PIC in a thread - even when the OP clearly hasn't got the necessary skills. I am sure that the OP, and other readers unfamiliar with PICs, will see the number of times that they are suggested and get to maybe start thinking that they are missing out and it might be worth spending a bit of time adding them to their skill set. BTW, it is extremely easy to give you an example of where a PIC will be cheaper than using a standard astable. A PIC "astable" circuit board can be reprogrammed in situ to change parameter over a huge range - with no change in physical components. Or the same board can be reprogrammed to an entirely different functionality, with no change in physical components. Rather than develop and stock a large number of boards for different applications, you just develop one, stock one and just program it for the application, when it is put into use. -- Sue |