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Orphaned configuration.

bel038 — Mon, 13 Sep 2021 11:45:53 GMT

I've got the same issues like Marks Willams

Orphaned configuration. No base extension cfg exists for com.renesas.cdt.rxc.release.win32.configuration.Id.382635110.1527953263.1804331052

Could you help me please?

RE: Orphaned configuration.

colporteur — Mon, 13 Sep 2021 14:11:51 GMT

I see by your profile information you are a new member to the E14 Community. Welcome. Most new people to this site think, with all this engineering talent in one place they will know what I am talking about. We appreciate the vote of confidence but need a little help.

There are a considerable number of people at this site that are willing to answer questions. The important thing to remember is, how the question is asked. You can get answers to questions fairly fast or you can spend considerable time in the cycle of post-reply-repeat. The key is the amount and quality of information provided in your question.

Present your question with as much detail as possible. Think of the details like bait for fishing. You want to catch a fish but you don't know what they fish like to eat. If you provide on your hook as many food delicacies fish normally eat you increase your chances of a fish taking a bite.

Your question needs to have all the details (bait) so that when someone passing by reads it, you have increased your chances they recognize (like) what you are talking about and can respond (bite). You don't want the person answering the question to do more work, request details, than is needed to answer the question. By giving them lots of information that they can process, you greatly improve your chances of a correct response the first time.

The unfortunate downfall of a good question is, the onus is on you. You have to do the work. It takes time and effort on your part and all you want is just an answer. The other downside after you do all that work is, no one has the answer. Augh crap, I did all that work and didn't get an answer. The flip side is that all that work does increase you chances of a first time answer when someone responds.

RE: Orphaned configuration.

Jan Cumps — Mon, 13 Sep 2021 12:33:59 GMT

I tried to search Marks Willams, and the error message you posted. I don't find anything back.

Do you have a link or some context related to your question? And what test instrument it's related to.

Is anyone tested Analog Discovery Pro series ?

kk99 — Wed, 14 Jul 2021 14:37:49 GMT

Can anybody share your opinion or review of new Analog Discovery Pro series ?

Is there any instrument available to measure BL factor in curve form? BL (N/Amp)

shalinisri — Thu, 10 Dec 2020 10:56:22 GMT

Is there any instrument available to measure BL factor in curve form? BL (N/Amp)

RE: Is there any instrument available to measure BL factor in curve form? BL (N/Amp)

shalinisri — Tue, 05 Jan 2021 07:20:14 GMT

Thank you for sharing this information!

RE: Is there any instrument available to measure BL factor in curve form? BL (N/Amp)

michaelkellett — Fri, 18 Dec 2020 14:38:00 GMT

There isn't a simple thing you can buy to do this.

If you think about the problem - (it's the force on a loudspeaker voice coil per amp of current through it) then you would need to know the length of the coil and the mean flux density.

No simple instrument can measure these.

You can measure it statically with some simple equipment (on bass and mid range speakers, not so easy on tweeters).

You need a way of accurately measuring the position of the speaker cone (a dial gauge will be fine but you could use reflective tape and a laser pointer or even a microscope).

Put a non magnetic weight on the cone - ideally an annular shape so that the cone deflects as much as you feel safe with.

Apply current to the coil until the cone comes back to its original position.

You know the weight, gravity, and the current - so you can work out the force per amp.

There is another way with many descriptions on the web:

https://www.roomeqwizard.com/help/help_en-GB/html/thielesmall.html

This is just one i found, don't know if its very good or not.

RE: Is there any instrument available to measure BL factor in curve form? BL (N/Amp)

shalinisri — Fri, 18 Dec 2020 07:26:17 GMT

If anybody can share any input on same. Its used for speaker testing.

Demo for Ken

john.scully — Thu, 12 Nov 2020 17:07:24 GMT

Line 1

Description 2

RE: Project PITS Problem

three-phase — Thu, 08 Nov 2018 22:19:25 GMT

Thans for the suggestion Doug, playing about with the circuit given to me by Jon has brought the gate voltage up to 4.51V, so I don't think I need to convert to a pull up resistor, but is still useful to know.

Kind regards.

RE: Project PITS Problem

three-phase — Thu, 08 Nov 2018 22:17:58 GMT

With the helpful answers, I have made some adjustments and have a rudimentary system functioning.

I have increased the pull down resistor to a 680k in series with 300k. Testing this, the resistance of the MOSFET dropped to 22.1 Ohms with the comparator turned on. So I think for a more final version, I will get a 1M resistor as suggested by Rod.

I then utilised the circuit identified by Jon and can get the LED to light when the comparator is turned on. An added bonus is that the voltage to the gate on the MOSFET has now increased to 4.51V from 3.38V and the resistance of the MOSFET is down to 1.3 Ohms when it is on.

Many thanks to jc2048 and 14rhb for your timely assistance, much appreciated.

Kind regards.

Project PITS Problem

three-phase — Tue, 06 Nov 2018 20:32:15 GMT

I have been trying to build up a Pick-up Indicator Test System (PITS) to detect the overcurrent indicator on protection relays I test, for the project14 test instrumentation.

Once I figured out that there are some photo diodes that respond better to green LEDs than others, I managed to get the circuit working. However, I then decided to add an output indicator off the negated output of the AD8561 comparator chip I was using. After adding this, both outputs of the comparator remain low and the LED is on all of the time.

When I drop out R6, the 10k resistor to the pnp transistor base, the circuit starts to work again.

Anybody have any ideas what I am doing wrong? The only thing I can think of doing is to increase the size of R6, I had originally calculated this as 14k for a 1mA base current, but from my limited selection, 10k was the closest I had.

I also find that when turned on, the MOSFET has a resistance of 780 ohms, which seems a little high to me?

[View:/resized-image/__size/620x427/__key/communityserver-discussions-components-files/223/2671.contentimage_5F00_104518.png:620:427]

[View:/resized-image/__size/616x411/__key/communityserver-discussions-components-files/223/6866.contentimage_5F00_104519.jpg:616:411]

Kind regards

RE: Project PITS Problem

14rhb — Thu, 08 Nov 2018 19:33:59 GMT

Very kind but I'd give it to Jon for his great schematic and circuit knowledge

Or if you still can't decide, perhaps just forget marking any comments as correct, most readers should be able to follow the thread.

Rod

RE: Project PITS Problem

dougw — Thu, 08 Nov 2018 05:02:18 GMT

I would flip Q2 (emitter to +5).

That opamp may not drive high enough to fully turn on the FET.

Switching R5 to be a pull-up instead of a pull down should help, but it may need to be adjusted to get the optimum thresholds.

RE: Project PITS Problem

dougw — Thu, 08 Nov 2018 04:46:09 GMT

Yes thanks...

RE: Project PITS Problem

jc2048 — Wed, 07 Nov 2018 23:14:20 GMT

If it turned out you did need the hysteresis, the datasheet has a section explaining how to implement it.

BTW there's nothing wrong with having the LED drive and MOSFET drive separate, indeed from a design point of view it's probably better - I just thought it was neat that with a 5V rail you could use the 3V drop of the LED to do the level translation up to the transistor and combine the two.

RE: Project PITS Problem

jc2048 — Wed, 07 Nov 2018 23:07:39 GMT

I think it can only be one. I'd give it to Rod - he got there first.

RE: Project PITS Problem

three-phase — Wed, 07 Nov 2018 21:50:55 GMT

Now I am stuck, can I mark two answers as correct as Rod and Jon have both helped me out?

RE: Project PITS Problem

three-phase — Wed, 07 Nov 2018 21:49:16 GMT

Many thanks for the information, I believe the led I fitted was high intensity so I can look to rework the circuit and get the transistor connected the correct way around.

The circuit shouldn't transition slowly. The photodiode will sit enclosed over an LED on the protection relay and conducts when that LED is lit. I haven't noticed any chatter whilst testing the circuit.

Unfortunately, I haven't given all the details of how it will be used, so you wouldn't have known any of this.

Kind regards.

RE: Project PITS Problem

three-phase — Wed, 07 Nov 2018 21:21:06 GMT

The 4mm output jacks will connect into the timing circuit of an injection test set, very low current but the voltage from the test set can vary depending on its setup or the the of tester used and I wanted to keep the circuit usable on as many testers as possible.

I will try an npn transistor over the weekend and see what happens.

Thanks for the help.

RE: Project PITS Problem

three-phase — Wed, 07 Nov 2018 21:17:37 GMT

The photo is a jpeg but the schematic was saved as a png - maybe that is the reason?

Kind regards

RE: Project PITS Problem

jc2048 — Wed, 07 Nov 2018 12:02:15 GMT

Your transistor is upside down - you've got the collector and emitter swapped. A transistor will work like that, but the gain is very much less than if you use it the right way round so you'd only ever do it in a circuit if you specifically wanted the very low saturation voltage it gives [in the old days, people used to build chopper amplifiers with transistors in 'inverse mode' for that reason].

The comparator outputs are designed to drive TTL inputs where the threshold would be around 1.5V and the high output only needs to be (at least) 2.8V.

If you've got a high-brightness white, green or blue LED, where the forward voltage would be a little over 3V and it would illuminate on a couple of milliamps, you could consider something like this

The comparator is very fast. Make sure you have the decoupling they recommend, close in to the part's supply pins, and be careful with the layout. You might also want some hysteresis - the input will only move slowly when there's no photodiode current [the reverse capacitance of the diode is quite high and there's only 5M to charge it], so when you slowly transition past the switching point there's a real possibility that noise will cause the output to chatter.

RE: Project PITS Problem

14rhb — Wed, 07 Nov 2018 10:23:26 GMT

I should have said, Donald's schematic didn't open for me either (Firefox/Windows10) but I zoomed my browser to see the details instead.

Rod

RE: Project PITS Problem

Dudley — Wed, 07 Nov 2018 10:17:48 GMT

better now?

RE: Project PITS Problem

14rhb — Wed, 07 Nov 2018 08:10:57 GMT

Hi Donald,

You are more than welcome. Sounds like you are making headway - which is always good to hear.

I'm not sure how you intend to use the output 4mm or how much current you want out; is 30 ohms a low enough resistance? I looked up the MOSFET you are using and the device conducts completely when Vgs is 10v, although the Vgs threshold is 2-4V. You could perhaps find a device that saturates at a lower Vgs ? There seems to be a handful of MOSFETS that have much lower "Rds(on) Test Voltage Vgs" which is a parameter you can select and filter via on the Farnell/Newark website...but most devices seem to be SMT

I think you should be all right taking the transistor and MOSFET off the same output. The MOSFET gate will be high impedance so won't affect the output. The transistor will be fed via its base resistor to derive the base current. [Famous last words ]

Nice Veroboard layout by the way.

Rod