home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!mcsun!uknet!cam-eng!cmh
- From: cmh@eng.cam.ac.uk (C.M. Hicks)
- Newsgroups: sci.electronics
- Subject: Re: Good way to prototype analog circuits?
- Message-ID: <1993Jan4.205631.5184@eng.cam.ac.uk>
- Date: 4 Jan 93 20:56:31 GMT
- References: <1993Jan3.231733.15225@ee.ubc.ca> <686@esun179.gdc.com>
- Sender: cmh@eng.cam.ac.uk (C.M. Hicks)
- Organization: cam.eng
- Lines: 38
- Nntp-Posting-Host: club.eng.cam.ac.uk
-
- kurdzo@gdc.com (Jim Kurdzo) writes:
-
- >John Paul Morrison (jmorriso@ee.ubc.ca) wrote:
- >>
- >> Does anyone want to share their tips on prototyping analog circuits?
- >> Specifically: sensitive, high gain circuits; RF circuits etc.
- >>
- >> These kind of circuits work well with PC boards with ground planes,
- >> but are there any simple, easy to make changes, techniques for this?
- >> Are there any pre-made boards with a ground plane, and holes with solder
- >> contacts on them?
- >>
-
- >I always use the pre-punched vector board with copper clad on one side.
- >Vector p/n 169P84WEC1 is 8.5" x 17" and available from Digi-Key for around
- >$20. Just cut it up into smaller pieces with tin snips. Wherever you
- >DON'T want a ground connection, ream out the ground plane with a 1/4" drill
- >bit.
-
- I have come across this stuff, but with clearance round the holes on the
- ground-plane side so you don't have to remove copper from individual holes.
- Unfortunately I have no idea where to get it, since the few bits I have were
- salvaged from a skip and have no markings. It is excellent for building
- one-off audio circuits.
-
- For high RF (eg 100MHz and up) a good method is to use single-sided board,
- copper side up, as a ground plane, and stick components to it with
- cyano-acrylate glue. Connections are then made in mid-air, using their own
- stiffness as the only support. This works *really well* despite sounding
- ludicrous, but is only suitable for developmental work.
-
- Christopher Hicks
-
- --
- ==============================================================================
- Christopher Hicks | If it doesn't fit...
- cmh@uk.ac.cam.eng | ...you need a bigger hammer.
- ==============================================================================
-