Reply by George Herold May 14, 20152015-05-14
On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Phil Hobbs wrote:
> On 05/14/2015 11:50 AM, John Larkin wrote: > > On Thu, 14 May 2015 04:07:59 -0700 (PDT), Phil Hobbs > > <pcdhobbs@gmail.com> wrote: > > > >>> Oh and I'm fairly certain the non-inverting amplifier is wired up correctly. Between > >>> switching back and forth from the non-inverting to the inverting configuration > >>> several times, I am fairly certain that both configurations were wired up properly. > >> > >> Hmm... "several times" does make it sound like a solderless breadboard, as John suggested. Those things are slabs of misery, for sure. > > > > Someone deserves an IgNobel prize for inventing them. > > They work okay for making a PIC blink a LED, as long as they're new. > > Then of course somebody plugs in a resistor from an old reel without > removing the residual adhesive, and two of the holes become flaky > forever. Then the next resistor is maybe oversize, and bends the crappy > metal fingers apart, and the one after that is corroded, and leaves > semi-insulating dust all over the place.... > > Not to mention a couple of pF of capacitance between adjacent rows, and > many nanohenries in series with all the (nastily daisy chained) grounds. > > Cheers > > Phil Hobbs > > > -- > Dr Philip C D Hobbs > Principal Consultant > ElectroOptical Innovations LLC > Optics, Electro-optics, Photonics, Analog Electronics > > 160 North State Road #203 > Briarcliff Manor NY 10510 > > hobbs at electrooptical dot net > http://electrooptical.net
Grin, I was laying out this little pressure circuit for testing the other day, a few flaky connections later and I grabbed my soldering iron and copper clad. I need to order more (copper clad) any decent sources? George H.