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Andy Halmshaw

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  1. Andy Halmshaw
    Hi David, I took copies of the magazine articles and have them in PDF format if you are interested. Let me know your email address and I can email them to you. Andy
  2. Andy Halmshaw
    Hi David I think that the flashing stars as you call them is when the telemetry data going to the Taranis changes. If the data is very stable no flash, when the value changes they flash. Andy
  3. Andy Halmshaw
    I may be able to help here. If you go to the Telemetry screen on your Taranis transmitter and copy "Cels" (in this case) three times, then edit the first line as per the second photo. Then edit the second line as per the third photo, you will have the individual cell votages, and obviously the third line the same but inserting 3 . This will work for any number of cells in a pack (only four with Chris's telemetry module), just keep copying for the number of cells line. You next need to edit the display page on your Taranis. Then when you long press page on your Taranis transmitter you can display your telemetry data as per the fourth photo, as you can see this is an old pack where the cells are slightly out of balance even though I use a balance charge every time. Hope this is of help. Andy Photo 1 Photo 2 Photo 3
  4. Andy Halmshaw

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  5. Andy Halmshaw

    Andy Halmshaw posted a gallery image in Member Albums

  6. Andy Halmshaw

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  7. Andy Halmshaw

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  8. Andy Halmshaw
    Hi Mike, Thank you for your post, entering the figure you had suggested helped but after experimenting I found that a figure of 1595 gave a more accurate reading. I used another meter in series and compared the readings and adjusted the number until I got the best match. Andy
  9. Andy Halmshaw
    Thanks for all the advice and help guys. As you can see from the photo below I now have the current at zero and the VFAS voltage correct, the zero current I obtained by editing the current line in the telemetry screen on the transmitter and setting an offset value. It may not be correct in your view but it is working and is consistent. I have added two photos of the soldering of the current sensor and leads and I feel that these are good well made connections, it may be just the combination of wire, connectors, soldering and device that gives the variation I am seeing. You and Mike probably would have an explanation or do I have to change a value in the software so that I do not have to do the offset in the transmitter? Thanks Andy
  10. Andy Halmshaw

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  11. Andy Halmshaw

    Andy Halmshaw posted a gallery image in Member Albums

  12. Andy Halmshaw

    Andy Halmshaw posted a gallery image in Member Albums

  13. Andy Halmshaw
    Hi Chris & Mike, Things are getting better as you will see from the photo below, I checked over the PCB to make sure there were no solder bridges and everything was okay and it was. I noticed that I had no sensor ID so I deleted the sensor and then discovered the sensor again and it appears to be working. What is being displayed is not correct but this seems to be the zero point and when I advance the throttle it goes up by about 1.5A (no prop fitted), I just need to find out how to set this to zero. At 47A the device would be getting very hot but it is quite cold. Do I need to edit the current sensor line in my Taranis as I notice it has an "Offset " option or is something still incorrect? You are correct Chris I do have the battery connected to the right and the ESC to the left, I notice that the VFAS voltage has come down ( not sure if this is the expected voltage). I found an error in one of the lines of code "#define RESISTOR_TO_GROUND 2700,2700,2700,2700,2700,2700" I had 2200 as the first number so was that causing part of the problem? I would like to calibrate the device but am not sure where to take a measurement and then which line to add it into. Can you give some help here please? I may give your values a go in the next one I build Mike and just see how they compare, as I have said this is all new to me, as the only programming I have done is GW Basic many years ago. Thanks Andy
  14. Andy Halmshaw

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  15. Andy Halmshaw
    Hi Chris, I have built my first Multi Function Telemetry sensor using your PCB and am chuffed to bits with the results. After reading Mikes message and remembering a problem we had at work I have left the LiPo negative wire off, it all appears to be working fine apart from the fact the Curr is reporting 0.0A. As you can see from the photo everything else looks correct. Any help or ideas would be gratefully received and what settings to use? Thanks Andy
  16. Andy Halmshaw

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  17. Andy Halmshaw

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  18. Andy Halmshaw
    Hi Chris I have found this Sensor Module on BangGood and EBay and was wondering if it could be used as an alternative to the ms5611. It only seems to accept 3.3V, but I do not see this as a problem as you suggest using the 3.3V Arduino. Below is the description and site link. What do you think? Andy GY-BMP280-3.3 High Precision Atmospheric Pressure Sensor Module For Arduino https://www.banggood.com/GY-BMP280-3_3-High-Precision-Atmospheric-Pressure-Sensor-Module-For-Arduino-p-1111135.html?cur_warehouse=CN
  19. Andy Halmshaw
    Hi Chris You are correct I do let the vario settle down after switching on and then do a reset before flying. Since mounting the Vario in a model and adding the foam it does appear to be much more stable. Hopefully in the coming weeks the weather will get better and there might even be a chance of some thermals, it will be interesting to see the flight logs then and how stable the Vario is over a longer time. I think I understand what you said about leaving the currect sensor off, but I am currently walking upright and hopefully as I play around and understand more I should get to the running stage! Andy
  20. Andy Halmshaw
    Below is a photo of a Alt/Vario Telemetry Sensor that I have built form the OpenXsensor web site, it is installed in an Easy Pigeon glider. Flying last night it all worked very well as you can see from the telemtry log printed. Looking forward to building up the PCB that Chris has designed and all the extra functionality it has, just waiting for some parts to arrive ( ordering from China was cheap but a mistake). Chris how easy would it be to have a Vario/Alti/Cell telemetry without the Current sensor and can you connect the receiver lead to a Y lead to piggyback sensors?
  21. Andy Halmshaw

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  22. Andy Halmshaw

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  23. Andy Halmshaw

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  24. Andy Halmshaw
    I have now put heat shrink over the unit and as advised cut the sleeving away so that the two holes are not blocked. As you can see I have added a piece of "Open Cell Foam Rubber" because on the ground it was fluctuating up and down. Did seem to help but it did still fluctuate. Can anybody with experience say if this is normal or am I expecting too much and do you have to mount the unit horizontal or is vertical ok? When the wind subsides and I can go flying I will see how it works in a model.
  25. Andy Halmshaw

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