The other part was that the sensitivity on the smart effector was too low. It would also be worth posting a full circuit diagram seeing as we seem to have moved on from where we started. I can’t get your readings from Post #30 to correlate with the resistances you are reading … I may be able to help there, but a prerequisite is proving your readings are what one would expect. If they aren’t then any attempted implementation to reverse those reading is simply wasted effort.


I seem to get about half of my bed to probe before one of the connectors wiggles loose, causing the effector to crash into the bed until the belt skips. Usually this happens a few times, and then the 6-blink pattern shows up once on the LED. At this stage I feel totally lost trying to programmatically extract the conversion result and then turn it into the desired figures to display on the LCD.

NCC 200 discontinued components

If the RS one isn’t a perfect match but fits, you can always change the set of them. I have the single supply psu, will check size and see what I have later today. LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you’re in the right place.


From your post, it seems you have a flat linearization for the K-Type sensors, correct? If not, please make sure to set the EGT sensor linearizations to “0” throughout. Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. There is a huge opportunity for 3D printing to offer teachers a new way to engage any and every student, no matter what their own challenges or their ages are. That’s why we’ve partnered with Kitronik to bring 3D printers to 5,000 classrooms in the UK. I believe that 3D printers should be usable by kids of all ages so that pupils have the opportunity to learn and realise their creative potential.

It has a maximum current of 40 Amps, 100 pulses per kWh,and is Din rail mounted. I can’t remember if you need to change the socket, as well. As a result, your viewing experience will be diminished, and you have been placed in read-only mode. Designed to provide the ultimate in accuracy, ensuring fasteners are tightened to correct specifications. Because of this I have now started working on writing a STD PIC program to be a dedicated math co-processor for this one purpose that also communicates on the I2C bus. I am getting there, but doing it this way is adding cost to the project.

My problem is that my watermeter, gasmeter end government-installed electricity fusebox are in one place, and from there I got a thick XVB cable to my personal fuse box at another location. I’ll make sure i take a better photo of which screw terminals ended up being 13 and 15 when i get home tonight. It will also give me a chance to hook up my single phase hyperion xr price solar meter in the same way and hopefully my Flukso graph will populate with another line. Had meters installed this morning so I will take a few photos and hook up the pulse outputs to the Fluxso when I get home tonight. I went with the equivalent for my single phase meter. As with most issues that take a while to fix, it was a combination problem.

RS Components

This is true, however in this case is resolved by taking feedback from the output side of the current limiter in turn creating an offset to compensate any error. I don’t know exactly what you are doing but it sounds on par with measuring the resistance of a detonator coil inside a brick of C-4, something medical related, something with massive adverse consequences when it goes wrong. The responses are greatly appreciated and I am eternally grateful for the loan of your brain’s. I am still of the view that charging up a capacitor and timing how long that takes may be a better way to increase resolution and accuracy.

  • Bits 31 & 30 are essentially STATUS bits and bit5 to bit0 are sub LSB’s that are ultimately insignificant noise.
  • It would also be worth posting a full circuit diagram seeing as we seem to have moved on from where we started.
  • The conversion result I need to work with is from bit6 to bit29 from what I read in the datasheet.
  • I have the single supply psu, will check size and see what I have later today.
  • For me, Thevenin’s theorem is probably the second most useful formula after Ohm’s Law.

It may not display this or other websites correctly. RS components has all manner of pre crimped cables of various lengths. Only users with topic management privileges can see it.

Pulse output 100imp/kWh

I am pretty sure (although still browsing the finer details of numerous datasheets, now inclusive of Hippy’s suggestion of HX711) I am going to go with an external ADC. Thus far the MCP3421 in singled-ended mode appears to be one of the best fits regards to the math and truly achieving the 0.1 ohm resolution I am looking for. This will then leave the accuracy coming down to my electronic design. Reference to the image I posted in POST #1, R1 will be raised to 1K or in practice at worst I may end up having to suffer with the current expense of using 510R and R2 shall be the resistor under test. Of course anything you attach to the circuit must reach the same standards.


There are a few thing you can do to get better results, before you get into multi-word maths. I have researched pretty hard trying to find the clever answer to my current query. I have semi found the answer, but can’t find how I can implement my values. The other possibility is Cliff or Elma, as other have suggested it is some times easier to buy a new set that match. Read more posts like this from Chris and other guest bloggers on the TCT Blog and visit CEL Technologies at TCT Show + Personalize at the NEC Birmingham, September 30th-October 1st . “There is a huge opportunity for 3D printing to offer teachers a new way to engage any and every student, no matter what their own challenges or their ages are.”

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It might be easier to determine the R from a lookup table rather than a reverse calculation, though that view might be because I’m struggling with the maths. I’m with AllyCat; putting the resistor under test at the bottom and using FVR for Vref+ you should be able to get down to +/- 0.5 ohm. Another method, depending on which PICAXE you are using, is to set the bottom of the ADC range to a different value than 0v. If you make R2 significantly smaller, say 51ohm, then the range is 0.7v to 5v. The linearization table or voltage curve is not used when you select K-Type as the input. Failure to heed this warning may result in death or serious injury to yourself and/or others.

The beauty of all these features is also that it makes 3D printing accessible to anyone. For example, students with dyslexia or other learning difficulties are able to engage with lessons fully and create the object they imagine. When a person struggles with traditional learning skills like reading and writing, the key to success is often found in alternative methods to help with comprehension and inspire creativity. Over the last few years, 3D printers have become significantly more affordable for schools, not least because they offer an all-in-one package for increasingly squeezed academic budgets. This increased safety means that lessons of creative design using 3D printers could be offered as early as Key Stage 1.

This allows children to simply click and drag to build their designs, then go on to quickly print them to see if they actually work. These tools mean a student to create 3D printer-ready objects for themselves, beginning to bridge the gap between a child’s imagination and what they’re able to create. I’m using the pulse sensor for the watermeter at a distance of more then 10 meters on a phone cable. So my problem is that I don’t have access to seperate phase cables in the location where the other meters are. Unless I cut open the isolation of the XVB to place the clamps. Totally programmable pulse frequency and length and 100% compatible with the Flukso.

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Along with a protection zener ‘crowbar’ eliminates any of those concerns. Any adverse effect any implemented protection may have can always be software or otherwise compensated. With the “unknown” resistor on the earthy side, the measurement becomes much easier; You can use the the FVR2048 reference for the ADC and remove any need to raise the Lower Reference voltage.

I am very confident this setup is mathematically more than capable of achieving 0.1 ohm resolution and coupled with my appropriate reference circuit is demonstrating stable accuracy. Bottom line is that in this case error/failure stands to potentially put me to substantial expense and this is why I personally oversee and orchestrate designs and operations myself thus placing the onus solely on me. So I am confident and have the desire and mindset to just get things right upfront. Achieving 0.1 ohm resolution when measuring a one ohm resistor is relatively easy. But getting 0.1 ohm resolution of a 300 ohm resistor will be difficult, even with a 12 bit ADC.