some breadboards
in [Design]
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From: John Larkin on 11 Apr 2010 15:36 On Sun, 11 Apr 2010 10:39:48 -0700, Fester Bestertester <fbt(a)fbt.net> wrote: >> No, it's just a one-sided insulator, but it stands up to solder. >> >> Kapton tape+copper tape = capacitor or transmission line >> >> Glues (hot melt, CA, epoxy) tend to not stick to copper for long. >> Solder is the best adhesive for copperclad. >> >> John > >You don't use any adhesive? Just anchor the GND pin to copper? (And, I >presume, some N/C and unused inputs, too...) That's the best way. Keeps everything planar. Double-stick (picture-mounting-type) foam tape does stick to copper forever, but is too thick for picosecond stuff. I use foam tape to paste down the Bellin surface-mount adapters. Just be careful to not solder through it to the copper. John
From: Joel Koltner on 12 Apr 2010 13:47 "brent" <bulegoge(a)columbus.rr.com> wrote in message news:35946de7-0159-4da6-a292-1e7fee70dd0a(a)b33g2000yqc.googlegroups.com... > Have you thought about getting one of these ? I would love one > http://www.lpkfusa.com/ We have one at work here, and IMO it's not nearly as useful as you'd think: Its capabilities are nowhere near what commercial board houses can provide, and the coast of making a board are generally just as much if not more when you're paying people for their time (particularly if you want, e.g., plated-through holes). Its saving grace is that you can have a board cut in a hours if you really need some relatively simple board right *now* -- while the commercial board houses can do work overnight, it commands a very significant premium, and you're still looking at at least 1 day and usually 2 or 3 depending on the exact timing. With a good engineering process those situations should be pretty rare, though. (I've often felt that a good measure of how good a company's engineering process is would be to count the percentage of FedEx/UPS overnight orders they place from distributors...) ---Joel
From: Winston on 14 Apr 2010 09:33 On 4/10/2010 5:55 PM, John Larkin wrote: (...) > Some sort of dremel circle cutter, like a tiny hole saw thing, would > be cute, to cut isolated circles. A while ago there was the 'iso pad' cutter tool made just like that for that purpose. Haven't seen one in years. --Winston
From: Jim Thompson on 14 Apr 2010 10:54 On Wed, 14 Apr 2010 06:33:44 -0700, Winston <Winston(a)bigbrother.net> wrote: >On 4/10/2010 5:55 PM, John Larkin wrote: >(...) > >> Some sort of dremel circle cutter, like a tiny hole saw thing, would >> be cute, to cut isolated circles. > >A while ago there was the 'iso pad' cutter tool made just like that >for that purpose. Haven't seen one in years. > >--Winston I still have one, from the mid '70's :-) ...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 | The only thing bipartisan in this country is hypocrisy
From: Grant on 14 Apr 2010 18:08
On Wed, 14 Apr 2010 07:54:10 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: >On Wed, 14 Apr 2010 06:33:44 -0700, Winston <Winston(a)bigbrother.net> >wrote: > >>On 4/10/2010 5:55 PM, John Larkin wrote: >>(...) >> >>> Some sort of dremel circle cutter, like a tiny hole saw thing, would >>> be cute, to cut isolated circles. >> >>A while ago there was the 'iso pad' cutter tool made just like that >>for that purpose. Haven't seen one in years. >> >>--Winston > >I still have one, from the mid '70's :-) I bought a hobby rotary engraver, cutting a rectangular island is easy. Built a small rectifier / switcher yesterday using the engraving tool to isolate some power traces. Much better than chopping up small bits of blank PCB for islands, no glue. Grant. -- http://bugs.id.au/ |