On Thu, 4 Feb 2016 20:09:36 -0600, Les Cargill <lcargill99@comcast.com> wrote:>John Larkin wrote: >> On Thu, 4 Feb 2016 02:16:53 +0000 (UTC), spope33@speedymail.org (Steve >> Pope) wrote: >> >>> John Larkin <jjlarkin@highlandtechnology.com> Wrote in message: >>> >>>> If a regular contributor here needs some work, there's nothing wrong >>>> with posting that fact. Might help someone else out, in fact. >>> >>> I think this is okay too. But I'll add that given the egalitarian >>> nature of Usenet, such privileges, if allowed at all, cannot be confined >>> to regular contributors. >>> >>> There is an old, possibly long-forgotten Usenet rule that says >>> that self-promotion of any sort must be limited to no more than >>> one post every two months. >>> >>> Steve >> >> In an un-moderated group, there are no rules. >> >> > > >That sounds like a rule.Of course. I make the rules. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
[OT] I'm Available for Work
Started by ●February 1, 2016
Reply by ●February 5, 20162016-02-05
Reply by ●February 5, 20162016-02-05
On Fri, 05 Feb 2016 12:35:11 -0500, rickman wrote:> Tim, > > I was chasing some of the articles you have written and noticed > "Sigma-delta techniques extend DAC resolution" is supposed to be in the > June 2004 issue while it is really in the July 2004 issue. They aren't > making it easy to reach the articles in ESP. If you could fix your web > page it would be a help. Just in case you didn't know, the entire > archive portion of the embedded.com site has been redone and your direct > links to the articles are broken.It's on my to-do list to just post the pdfs on my web page. Thanks for the reminder. Maybe I should get to that this weekend -- Joerg (from SED) mentioned that I should put my recent analog experience up in my "capabilities" section, as well. Shortly after posting my plea, and entirely independent of it, a whole bunch of short-term work fell into my in-basket. It's that whole Murphy thing -- I'm sure that if I'd kept my fingers off the keyboard that I'd still be looking an one-and-only-one customer right now. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●February 5, 20162016-02-05
On Fri, 05 Feb 2016 17:52:32 +0000, Paul wrote:> In article <n8vnmb$llf$1@dont-email.me>, gnuarm@gmail.com says... >> >> On 2/4/2016 5:01 AM, Paul wrote: >> > In article <thr2bbdtvrtf39kqkfvrvo89iafhnobm5b@4ax.com>, >> > jjlarkin@highlandtechnology.com says... >> >> > .... >> >> I've noticed lately that people are harassing us, practically >> >> begging us, to do analog stuff. But too many are small-scale physics >> >> fads, which are unlikely to be enough volume to be profitable. >> > >> > Get several silly requests one of the silliest that did not want >> > redesign but just layout the PCB had >> > >> > 1/ Bluetooth chip in 6 x 6 mm QFP (had to be QFP) with NO tracks >> > under >> > the device (data sheet requirement to avoid interference) >> > >> > 2/ PCB had to be 8 x 40 mm (remember that 6mm wide QFP) >> > >> > 3/ several wire points for power >> > >> > 4/ somewhere for the antenna >> > >> > 5/ Several other devices that really needed to be aligned to get >> > magnetic/gyro/compass axis aligned >> > >> > 6/ Best of all using a latching Hall effect switch device and its >> > Open Drain output to drive the 3V3 rail for all devices. >> > >> > As NO redeign or change of packages were permitted I said No Quote >> > could just see the blame trail game on that one a mile off. >> > >> > I have seen too many that want to break the lawa of physics >> >> You didn't explain any of the difficulties to them, you just washed >> your hands of it? > > Repeatedly but they kept saying it would fit and work, so I said NO > quote. > > So as not able to change package or do any other redesign I did not want > to be caught in blame trail etcI could see, if I were hurting for work, writing a clause into the contract that states that inasmuch as the project is technically risky, as long as I follow their specifications they assume all risk. Then I'd ask for money up front... -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●February 5, 20162016-02-05
On Thu, 04 Feb 2016 19:46:57 -0800, sean.c4s.vn wrote:> Ha, ha, ha. Unemployed. Get a job in the service sector! Flip those > burgers dude and live in a trailer park.Technically I am in the service sector, as are nearly all the regulars in this group. I was surprised to find out a couple of decades ago that even if you're working at a manufacturing company designing stuff that'll be put together less than 200 feet away from your desk, if you're doing design work it's considered "service" work. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●February 5, 20162016-02-05
Tim Wescott <seemywebsite@myfooter.really> wrote:>I could see, if I were hurting for work, writing a clause into the >contract that states that inasmuch as the project is technically risky, >as long as I follow their specifications they assume all risk. > >Then I'd ask for money up front...Contracting can be tricky, and very often the customer expectations are largely uncorrelated to the wording of the contract. Still trying to figure out what the purpose of the open-drain Hall-effect latch is... S.
Reply by ●February 5, 20162016-02-05
On 2/5/2016 3:08 PM, Steve Pope wrote:> Tim Wescott <seemywebsite@myfooter.really> wrote: > >> I could see, if I were hurting for work, writing a clause into the >> contract that states that inasmuch as the project is technically risky, >> as long as I follow their specifications they assume all risk. >> >> Then I'd ask for money up front... > > Contracting can be tricky, and very often the customer expectations > are largely uncorrelated to the wording of the contract.My brother is not an engineer and has an interesting project where he is taking a government designed system and commercializing it. He has a mechanical engineer but the electrical engineer isn't working out because he has a full time job plus is moonlighting other projects too. I was talking to him about the project and at one point he said that the board which needs to be redesigned due to parts obsolescence has to amplify the signal, "so the software doesn't have any problems with it", meaning to not distort the signal. But that is a bit of a difficult way to spec it for the engineer designing it. The acceptance test is whether the software has bugs or not! lol I think the reality is they don't even need the extra amplifier. There are two systems and I only see the amplifier board in the one, not the other that they wish to get in production. That's how poor the documentation is, we can't tell what the system is made of. -- Rick
Reply by ●February 5, 20162016-02-05
rickman <gnuarm@gmail.com> wrote:>On 2/5/2016 3:08 PM, Steve Pope wrote: >> Tim Wescott <seemywebsite@myfooter.really> wrote: > [...] There are two systems and I only see the amplifier board > in the one, not the other that they wish to get in production. > That's how poor the documentation is, we can't tell what the > system is made of.Perhaps this is a situation where they demo'ed one design but hope to productize a lower-cost variant. Cost-reduction algorithm: "Remove components until the system fails, then add back in the last component you removed." S.
Reply by ●February 5, 20162016-02-05
> >>> > >>> Steve > >> > >> In an un-moderated group, there are no rules. > >>if someone clearly labels the subject as OT and has a clear subject description, as Tim did, then I don't see any issue. If you don't want to read that, you don't have to. I get annoyed by subjects like " I have a DSP question, can anyone help" It provides no information. In general I'm sorry to see that usenet appears to be dying. It is a good source of information and entertainemnt. Mark
Reply by ●February 5, 20162016-02-05
In article <n92vfl$iec$1@blue-new.rahul.net>, spope33@speedymail.org says...> > Tim Wescott <seemywebsite@myfooter.really> wrote: > > >I could see, if I were hurting for work, writing a clause into the > >contract that states that inasmuch as the project is technically risky, > >as long as I follow their specifications they assume all risk. > > > >Then I'd ask for money up front... > > Contracting can be tricky, and very often the customer expectations > are largely uncorrelated to the wording of the contract. > > Still trying to figure out what the purpose of the open-drain > Hall-effect latch is... > > S.Speed or RPM sensing sensing North pole turns on south pole turns off (Honeywell SS361). Position sensing from two small magnets (electric windows or soft tops) etc.... In this case they were trying to use it as the power switch to supply 3V3 to ALL devices as in the actual 3V3 not an enable or anything like that. -- Paul Carpenter | paul@pcserviceselectronics.co.uk <http://www.pcserviceselectronics.co.uk/> PC Services <http://www.pcserviceselectronics.co.uk/pi/> Raspberry Pi Add-ons <http://www.pcserviceselectronics.co.uk/fonts/> Timing Diagram Font <http://www.badweb.org.uk/> For those web sites you hate
Reply by ●February 5, 20162016-02-05
On 2/5/2016 5:08 PM, Steve Pope wrote:> rickman <gnuarm@gmail.com> wrote: > >> On 2/5/2016 3:08 PM, Steve Pope wrote: >>> Tim Wescott <seemywebsite@myfooter.really> wrote: >> [...] There are two systems and I only see the amplifier board >> in the one, not the other that they wish to get in production. >> That's how poor the documentation is, we can't tell what the >> system is made of. > > Perhaps this is a situation where they demo'ed one design but > hope to productize a lower-cost variant. > > Cost-reduction algorithm: > > "Remove components until the system fails, then add back in the > last component you removed."Hardly! This was developed by the government with no written use cases or any other project management goals. They had two different systems for two different applications (one which required more gain and so the extra amplifier board) and no "customers" asking for the system with the amplifier board. The first system works well enough that it is being used in both military and civilian applications as we speak. They need more of them pumped out though. -- Rick
