MsPacMan
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From: John Larkin on 16 Jul 2010 13:29 This is cool, a nanograbber for clipping onto fine-pitch parts. ftp://jjlarkin.lmi.net/MsPacMan.JPG As you squeeze it to open the little wire clamp things, it looks just like the PacMan thing gobbling up dots. Flip the image over, and it looks like some fancy Israeli assault rifle. These cost $14 each, by the dozen. But to be serious for a second: We seed our boards with "test points", really just unmasked vias with 42 mill drills, a nice size to jam a scope probe tip into. What I really need is a thing that I can solder to the end of a wire, like a scope ground clip or a test lead, that will plug into such a hole and stay put and make contact. It would be a little metal tube with a bustle of curved, springy wires, 2 or more, poking out the end... springy wires jam into via tube =========== /------\ wire ----- \ ===================== -----\ / =========== ------- Google's no help. Does anybody know if someone makes these things? John
From: Nunya on 16 Jul 2010 13:58 On Jul 16, 10:29 am, John Larkin <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: > This is cool, a nanograbber for clipping onto fine-pitch parts. > > ftp://jjlarkin.lmi.net/MsPacMan.JPG > > As you squeeze it to open the little wire clamp things, it looks just > like the PacMan thing gobbling up dots. Flip the image over, and it > looks like some fancy Israeli assault rifle. These cost $14 each, by > the dozen. > > But to be serious for a second: We seed our boards with "test points", > really just unmasked vias with 42 mill drills, a nice size to jam a > scope probe tip into. What I really need is a thing that I can solder > to the end of a wire, like a scope ground clip or a test lead, that > will plug into such a hole and stay put and make contact. It would be > a little metal tube with a bustle of curved, springy wires, 2 or more, > poking out the end... > > springy wires jam into via > tube > =========== /------\ > wire ----- \ > ===================== > -----\ / > =========== ------- > > Google's no help. Does anybody know if someone makes these things? > > John I used to sit and make little test points myself that were tiny pieces of Teflon sheathed SPC wire which I stripped a bit, then quick tinned to stiffen the stripped segment a bit, then form that into a tiny loop, then re-tin that with it against the non-looped part of the bared wire making a closed, round, non-emissive loop. Then strip the other end carefully so that you get some wire below the loop, but no so long as to be overtly emissive, and tin what is below that, and cut it for PCB insertion. One can choose a gauge that makes for an interference fit on the via so that inserted test points remain during reflow or wave operations.. I would personally hand solder them. Scope probes and meter probes hook right on to the little loops just fine at that point.
From: oparr on 16 Jul 2010 14:34 > But to be serious for a second: We seed our boards with "test points", > really just unmasked vias with 42 mill drills, a nice size to jam a > scope probe tip into. I use redundant 32 mil vias for test points. Allows you to press fit a single pin breakaway header when necessary. On Jul 16, 1:29 pm, John Larkin <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: >
From: Jan Panteltje on 16 Jul 2010 14:35 On a sunny day (Fri, 16 Jul 2010 10:29:43 -0700) it happened John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in <615146tnvt2es6ptnqbko6k1t6i71j9tkv(a)4ax.com>: >This is cool, a nanograbber for clipping onto fine-pitch parts. > >ftp://jjlarkin.lmi.net/MsPacMan.JPG > >As you squeeze it to open the little wire clamp things, it looks just >like the PacMan thing gobbling up dots. Flip the image over, and it >looks like some fancy Israeli assault rifle. These cost $14 each, by >the dozen. > >But to be serious for a second: We seed our boards with "test points", >really just unmasked vias with 42 mill drills, a nice size to jam a >scope probe tip into. What I really need is a thing that I can solder >to the end of a wire, like a scope ground clip or a test lead, that >will plug into such a hole and stay put and make contact. It would be >a little metal tube with a bustle of curved, springy wires, 2 or more, >poking out the end... > > springy wires jam into via > tube > =========== /------\ > wire ----- \ >===================== > -----\ / > =========== ------- > I have used normal sewing needles, those come in a pack with differnt sizes for a few cents. the tip is conical shaped and will stick a bit. On the other side you can slide it into an isolated wire, or clip the scope on it.
From: Jim Thompson on 16 Jul 2010 15:18
On Fri, 16 Jul 2010 10:29:43 -0700, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >This is cool, a nanograbber for clipping onto fine-pitch parts. > >ftp://jjlarkin.lmi.net/MsPacMan.JPG > >As you squeeze it to open the little wire clamp things, it looks just >like the PacMan thing gobbling up dots. Flip the image over, and it >looks like some fancy Israeli assault rifle. These cost $14 each, by >the dozen. > >But to be serious for a second: We seed our boards with "test points", >really just unmasked vias with 42 mill drills, a nice size to jam a >scope probe tip into. What I really need is a thing that I can solder >to the end of a wire, like a scope ground clip or a test lead, that >will plug into such a hole and stay put and make contact. It would be >a little metal tube with a bustle of curved, springy wires, 2 or more, >poking out the end... > > springy wires jam into via > tube > =========== /------\ > wire ----- \ >===================== > -----\ / > =========== ------- > > >Google's no help. Does anybody know if someone makes these things? > >John I vaguely remember, from my GenRad days, "pogo" pin ?? ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | Friday is Wine and Cheeseburger Day |