voltage divider calcs
in [Design]
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From: Jan Panteltje on 24 Apr 2010 15:43 On a sunny day (Sat, 24 Apr 2010 14:05:33 -0500) it happened "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote in <11g6t518iem9jlftq71j2qgso4slp59crp(a)4ax.com>: >On Sat, 24 Apr 2010 18:57:09 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> >wrote: > >>On a sunny day (Sat, 24 Apr 2010 13:42:04 -0500) it happened >>"krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote in >><tqe6t598fddfg8feih0pmp90nfelhfnmct(a)4ax.com>: >> >>>On Sat, 24 Apr 2010 18:09:58 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> >>>wrote: >>> >>>>On a sunny day (Sat, 24 Apr 2010 12:12:01 -0500) it happened >>>>"krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote in >>>><bi96t5lr4mbbvqpcadtboii5anp48l7cc6(a)4ax.com>: >>>> >>>>>On Sat, 24 Apr 2010 09:43:00 -0700, John Larkin >>>>><jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>>>> >>>>>>On Sat, 24 Apr 2010 15:12:19 GMT, Jan Panteltje >>>>>><pNaonStpealmtje(a)yahoo.com> wrote: >>>>>> >>>>>>>On a sunny day (Sat, 24 Apr 2010 05:23:16 +0200) it happened Sjouke Burry >>>>>>><burrynulnulfour(a)ppllaanneett.nnll> wrote in >>>>>>><4bd26424$0$14132$703f8584(a)textnews.kpn.nl>:am still using WIN3.11 for workgroups, have not needed any >>>>>>>>bugs fixed by M$. >>>>>>>>You dont need a new or refurbished OS or computer every 2 years. >>>>>>> >>>>>>>Exactly >>>>>>>Still running a 10 year old Duron 950 Mhz as server, and Linux of course. >>>>>>>All backuped 2 x. >>>>>>>When all applications run, there is no reason in the world to upgrade OS. >>>>>>> >>>>>>>To be honest, nothing really new, a killer application one *must* have, >>>>>>>has happend in the last 10 years.... >>>>>> >>>>>>Google Earth. >>>>> >>>>>FPGA tools that actually work. >>>> >>>>You could have switched to Altera in 2000 :-) >>> >>>No, hardware that works is always the priority. >> >>OK, 1999 > >A year (backwards) doesn't make a difference. Altera crappy I/Os weren't >fixable. Xilinx software was easily fixed by using Synplify. I dunno about 'crappy I/O', but Synplify is not free. Xilinx could not even be bought, lost of vaporware, expensive too.
From: krw on 24 Apr 2010 16:09 On Sat, 24 Apr 2010 19:43:15 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >On a sunny day (Sat, 24 Apr 2010 14:05:33 -0500) it happened >"krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote in ><11g6t518iem9jlftq71j2qgso4slp59crp(a)4ax.com>: > >>On Sat, 24 Apr 2010 18:57:09 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> >>wrote: >> >>>On a sunny day (Sat, 24 Apr 2010 13:42:04 -0500) it happened >>>"krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote in >>><tqe6t598fddfg8feih0pmp90nfelhfnmct(a)4ax.com>: >>> >>>>On Sat, 24 Apr 2010 18:09:58 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> >>>>wrote: >>>> >>>>>On a sunny day (Sat, 24 Apr 2010 12:12:01 -0500) it happened >>>>>"krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote in >>>>><bi96t5lr4mbbvqpcadtboii5anp48l7cc6(a)4ax.com>: >>>>> >>>>>>On Sat, 24 Apr 2010 09:43:00 -0700, John Larkin >>>>>><jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >>>>>> >>>>>>>On Sat, 24 Apr 2010 15:12:19 GMT, Jan Panteltje >>>>>>><pNaonStpealmtje(a)yahoo.com> wrote: >>>>>>> >>>>>>>>On a sunny day (Sat, 24 Apr 2010 05:23:16 +0200) it happened Sjouke Burry >>>>>>>><burrynulnulfour(a)ppllaanneett.nnll> wrote in >>>>>>>><4bd26424$0$14132$703f8584(a)textnews.kpn.nl>:am still using WIN3.11 for workgroups, have not needed any >>>>>>>>>bugs fixed by M$. >>>>>>>>>You dont need a new or refurbished OS or computer every 2 years. >>>>>>>> >>>>>>>>Exactly >>>>>>>>Still running a 10 year old Duron 950 Mhz as server, and Linux of course. >>>>>>>>All backuped 2 x. >>>>>>>>When all applications run, there is no reason in the world to upgrade OS. >>>>>>>> >>>>>>>>To be honest, nothing really new, a killer application one *must* have, >>>>>>>>has happend in the last 10 years.... >>>>>>> >>>>>>>Google Earth. >>>>>> >>>>>>FPGA tools that actually work. >>>>> >>>>>You could have switched to Altera in 2000 :-) >>>> >>>>No, hardware that works is always the priority. >>> >>>OK, 1999 >> >>A year (backwards) doesn't make a difference. Altera crappy I/Os weren't >>fixable. Xilinx software was easily fixed by using Synplify. > >I dunno about 'crappy I/O', I do. That's the point. > but Synplify is not free. Nothing is free. Want to do the job? Here's the cost. >Xilinx could not even be bought, lost of vaporware, expensive too. I had no problems, at least after they got the Virtex line out (they bought the company I was going to use and killed that product). Do you want to do the job? Here's the cost.
From: Jamie on 25 Apr 2010 04:28 Nico Coesel wrote: > John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: > > >>I have to confess: I used a 555 once. Just once, honest. It ran off 12 >>volts and ran a charge pump diode thingie to make -5. Forgive me. > > > I've used an NE555 as a crude PWM controller on several occasions. > Going from -48V to +140V was the most extreme. > I don't care what they say about 555's , I find them one of the most versatile devices out there. They're great for the basic timer functions of various configurations along with being used for RS FF/latch, schmitt trigger, Power monitoring etc... The list goes on!
From: -jg on 24 Apr 2010 19:26 On Apr 25, 5:35 am, John Larkin <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: > On Sat, 24 Apr 2010 12:12:01 -0500, > My guys are seriously pushing me to go to Lattice or Altera. The > silicon may not be as advanced, but the tools may be better. Dumping > NuHorizons certainly didn't help. So this thread is called "voltage divider calcs" as a cloak then ;) If you do not NEED the advanced silicon, why choose it ? It's nicknamed the bleeding edge for a reason.. -jg
From: John Fields on 24 Apr 2010 20:08
On Sun, 25 Apr 2010 04:28:12 -0400, Jamie <jamie_ka1lpa_not_valid_after_ka1lpa_(a)charter.net> wrote: >Nico Coesel wrote: > >> John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >> >> >>>I have to confess: I used a 555 once. Just once, honest. It ran off 12 >>>volts and ran a charge pump diode thingie to make -5. Forgive me. >> >> >> I've used an NE555 as a crude PWM controller on several occasions. >> Going from -48V to +140V was the most extreme. >> >I don't care what they say about 555's , I find them one of the most >versatile devices out there. > > They're great for the basic timer functions of various configurations >along with being used for RS FF/latch, schmitt trigger, Power monitoring >etc... The list >goes on! --- Indeed. One of the more unusual applications was worked out in a thread here, where the OP asked for a way to get more audio output from a passive buzzer and the solution was to use two cross-coupled 555's with their outputs in bridge mode across the transducer. Clever. :-) And kudos back from the OP, BTW. JF |