X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-OWM-Source-IP: 86.184.235.117 (GB) X-OWM-Env-Sender: ashton DOT models AT btinternet DOT com X-Junkmail-Premium-Raw: score=9/50,refid=2.7.2:2017.9.13.113016:17:9.975,ip=,rules=__HAS_REPLYTO, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __TO_MALFORMED_2, __TO_NO_NAME, __REFERENCES, __HAS_FROM, __HAS_MSGID, __SANE_MSGID, __USER_AGENT, __MOZILLA_USER_AGENT, __MIME_VERSION, __IN_REP_TO, __CT, __CT_TEXT_PLAIN, __CTE, __REPLYTO_SAMEAS_FROM_ADDY, __REPLYTO_SAMEAS_FROM_ACC, __TO_IN_SUBJECT2, __REPLYTO_SAMEAS_FROM_DOMAIN, __ANY_URI, __URI_WITH_PATH, __URI_NO_WWW, __CP_MEDIA_BODY, __CP_URI_IN_BODY, __FRAUD_INTRO, __FRAUD_MONEY_CURRENCY_EURO, __SUBJ_ALPHA_NEGATE, __URI_IN_BODY, __URI_NOT_IMG, __FORWARDED_MSG, __NO_HTML_TAG_RAW, BODY_SIZE_1900_1999, BODYTEXTP_SIZE_3000_LESS, __MIME_TEXT_P1, __MIME_TEXT_ONLY, __URI_NS, HTML_00_01, HTML_00_10, __FRAUD_MONEY_CURRENCY, __PHISH_SPEAR_GREETING, BODY_SIZE_5000_LESS, IN_REP_TO, MSG_THREAD, LEGITIMATE_SIGNS, __SINGLE_URI_TEXT, SINGLE_URI_IN_BODY, BODY_SIZE_2000_LESS, TO_IN_SUBJECT, __MIME_TEXT_P, REPLYTO_SAMEAS_FROM, REFERENCES, NO_URI_HTTPS, BODY_SIZE_7000_LESS, URI_WITH_PATH_ONLY Subject: Re: [geda-user] gshem 1.8.2 Bug? Slotting fails for a custom BPX85 photo-transistor array To: geda-user AT delorie DOT com References: <7b205135-7b91-e8f0-a5d8-efc4cb0b787d AT zen DOT co DOT uk> <01968e6b-14de-7e0e-bcbd-93b35a17a6c7 AT zen DOT co DOT uk> <59B80209 DOT 7000104 AT xs4all DOT nl> From: "Barry Jackson (zen25000 AT zen DOT co DOT uk) [via geda-user AT delorie DOT com]" Message-ID: Date: Wed, 13 Sep 2017 12:54:50 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <59B80209.7000104@xs4all.nl> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On 12/09/17 16:49, Bert Timmerman (bert DOT timmerman AT xs4all DOT nl) [via geda-user AT delorie DOT com] wrote: > Hi Barry, > > Thanks for sharing the symbol and footprint ... much appreciated. > > The second pin defined in the slot could be pinseq=2 ... pinseq --> pin > sequence = 2. > > Have a look at the section "Symbol Requirements" at > http://wiki.geda-project.org/geda:gschem_symbol_creation > > > Another thing: looking at the Osram datasheet I see pins with a > rectangular sectional area of 0.5 mm by 0.15 mm (least) varying to 0.7 > mm by 0.25 mm (most), depending on the use of the under side of the > package as a mounting surface. > > This would require a drill size of 29.26 mil ... round up at 30 mil ... > and add 2 mil to be on the safe side when pin pitch varies and/or pins > are misaligned in the package (bended pins ... YMMV) giving a drill size > of 32 mil. > > In your footprint I see drill holes of 20 mill, either way too small. > > Caveat: post drill the plated through holes into unplated through holes, > and solder on top layer as well ;-) > > One could do a "Least" and a "Most" variant of the footprint for both > use cases. > > Just my EUR 0.02 > > Kind regards, > > Bert Timmerman. > Hi Bill, Thanks for your input, yes I had read that section which does indeed say that the pinseq should increment by one, but with all the other rather confusing docs I was reading at the time it somehow did not sink in. Regarding the hole sizes, thanks for your review. I never intended this for public consumption, nor for use by a commercial board fabricator, so did not really pay attention to exact hole sizes. In my application it will be single or maybe double sided, manually drilled and soldered top-side where needed. However thanks for your lesson on tolerances and attention to detail, all noted ;) Cheers, Barry