You can comment about it here, and post any of your graphics online with a link here, as a workaround.
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
She has my sympathy. OTOH, she didn't have to put up with Fred's attempts to add to her pain. :)
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
Ouch. Our health care plan here doesn't cover dentistry (a lot of families have Blue Cross or whatever supplemental coverage through employers) but it does cover dental surgery (non cosmetic) and pathology type stuff done by specialists. As part of cost-cutting they've been dropping little things (like annual eye examinations for people without diabetes/glaucoma etc) but so far nothing major. I don't mind paying a few hundred now and then for routine things.
Best regards, Spehro Pefhany
-- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
True but so far I have never come across a situation where this was a problem for me.
As long as you make something that is really more useful in practice, not simply motivated by the "Not Invented Here" instinct, then fair enough and good luck.
Chris
:-) Maybe all of them!
But you know, it's like JL said: it seems whatever idea gets posted, someone objects to it. Your idea, zany as it might seem, could actually be good. The meter "talks" to you when you do the bonehead move. I'm not suggesting "voice output" for all readings, but an "extended" audible indication that the cap was charged should get one's attention. The "bang" might be too brief or not loud enough.
Ed
Good point. So your idea is to add a resistor, or to abandon the switch or ?
Ed
I had to rewrite some test software (In Qbasic, of all things) for an automated test fixture. If the board was good, it was done before you could fill in the job and serial numbers on the test data sheet. (They let us build and use an automated test fixture, but refused to change the test data sheet. that meant you still had to check off 25 'passed' boxes, instead of one.)
As the software evolved, I added troubleshooting instructions, and finally two sound effects. If it failed, it sounded like a fog horn, and paused for troubleshooting. If it passed, it sounded like the old Atari video games, with the rising notes. The boss freaked out, when he heard it one day. he was yelling, OK! Who is playing games! When he found out what it was, he just shook his head and walked away. :)
If it passed, you put in the next board and started the test while you finished the first data sheet and started the next test data sheet.
The idea I had for a computer interfaced ESR test set had the option of saying pass or fail, when used for incoming inspection. I don't know where my notes and software are. There are about 35 used, low capacity hard drives stuffed into boxes. One might still have my notes and preliminary circuit. The GUI allowed you to select brand, then series, voltage and capacitance. That called up the specifications for the part, and included tolerance for either repair work or go/nogo testing. In that mode it could be used standalone, after programming it. If I was doing it today, I would probably add some flash memory to store all the capacitor data I could, and use a small LCD display for setup and testing.
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
Now, *that* would be an esr meter!
It would probably not appeal to a wide market segment, so it was being designed for personal use. It would be great in a small shop where you could program it and have someone check a box capacitors before putting them into inventory, or to check stock that has been on the shelf for a while. I even considered a jig to put reeled parts on to automatically test and advance to the next cap, till it ran out or encountered a bad part.
-- Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
To make it accept working under the cap bias. Not that difficult.
-- Thanks, Fred.
How fast do you need a reading?
Just use an AC/DC power supply and a calorimeter.
-- Paul Hovnanian mailto: snipped-for-privacy@Hovnanian.com
------------------------------------------------------------------ SHIFT TO THE LEFT! SHIFT TO THE RIGHT! POP UP, PUSH DOWN, BYTE, BYTE, BYTE!
You forget this is a public forum. Those who actually read your post, or read the project FAQ, or such, may agree to the silence thing. Others, like hecklers wandering by the "soap box" corner of the park, will interrupt or flame whenever they feel the need, without hesitation.
But I agree, creativity flourishes best in a "no flame" environment. That was the way it was at Apple, at least when I was there -- a lowly tech writer at the time.
It's great watching the neurons fire, left and right.
-- DaveC me@bogusdomain.net This is an invalid return address Please reply in the news group
To put the meter into practice, in a service bench environment, you're typically using test probes with both hands.
How to operate such a switch? A foot switch maybe?
-- DaveC me@bogusdomain.net This is an invalid return address Please reply in the news group
And so goes another great idea (the *meter*, in case you forgot), sunk in port by petty arguing.
It's astonishing that anything gets accomplished in the world, really, with such an epidemic of the 5-year-old complex.
-- DaveC me@bogusdomain.net This is an invalid return address Please reply in the news group
I have Indian friends who go back to India and get dental done at a fraction of the cost. They not only survive, they seem to "thrive".
Ask around. You may already know someone who has a family willing to "host" you for the duration of your "repairs".
-- DaveC me@bogusdomain.net This is an invalid return address Please reply in the news group
[snip]
IMO restrictive early design decisions can cripple the final performance of any system, and (imo again) this design should go for best performance as the primary aim. In this case an early design decision of battery power is already compromising the applied signal, and leading to the requirement of special opamps.
Suggestions:-
Have built in rectifiers/regulators that develop single or bipolar rails, as finally required.
This allows much more freedom for stimulus design, and indeed for the whole circuit design.
Just go for a circuit design on a pcb (that can even be laid out within the group).... 2-layer only, whatever size is needed, jelly-bean and non-smt components as far as possible.
This makes it easier for anyone to obtain components and assemble. The pcb can be mounted in whatever box is convenient. A built-in display can be used if wanted, otherwise 4mm sockets for a DMM or DVM to plug into.
-- Tony Williams.
Hmm.
Right, the thread has been hijacked by the usual bunch of troublemakers and non-producers. My meter will not be posted here...
There are all kinds of cheap plans available. These people will pull a tooth for $30.
A year ago I would probably have wholeheartedly agreed about the non-SMT components thing. Having spend a few days doing a lot of SMT assembly with nothing more sophisticated than a pointier tip on my trusty old Weller TC iron, a good pair of tweezers, and a half-decent set of magnifying glasses - it's not so hard. Plain old skinny solder, no paste, no reflow. Plenty of light helps.
For rework either a small hot air gun or a pair of hot tweezers would be helpful, but I have managed with just the old-fashioned iron thus far on a small amount of rework. I'll likely invest in something along that line eventually, either a cheapy from Marlin P Jones, et al. or something a bit pricier if there's some actual reason to spend more for it.
-- Cats, coffee, chocolate...vices to live by
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