AeroElectric-List Digest Archive

Tue 10/30/18


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 12:11 AM - IVOprop current limiter project (Todd Bartrim)
     2. 07:03 AM - Re: IVOprop current limiter project (Emil Sr)
     3. 08:32 AM - Re: IVOprop current limiter project (Todd Bartrim)
     4. 11:12 AM - Re: IVOprop current limiter project (user9253)
     5. 12:13 PM - Re: Re: IVOprop current limiter project (Todd Bartrim)
     6. 12:50 PM - Re: IVOprop current limiter project (user9253)
 
 
 


Message 1


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    Time: 12:11:03 AM PST US
    From: Todd Bartrim <bartrim@gmail.com>
    Subject: IVOprop current limiter project
    I've successfully completed this IVOprop current limiter project that designed by the collaborative effort of this group. After a bit of tweaking of the code by Paul Fisher and switching the position of the 2 zener diodes, it works perfectly. For those that are unaware of what this project is; The IVOprop as supplied uses a 10 amp circuit breaker to indicate end-of-travel. Now the IVO is a love-it or hate-it prop but even those that are in the love-it category will admit that waiting for a breaker to trip is not a very elegant way to know when the prop has reached it's end of travel. So over several years a project evolved on this list originally being completely hardware based and then evolving into this current micro controller based project. The original design was built by at least 2 individuals but it appeared that despite the work put in by members of this list, the micro controller based version had not been built. I had read with interest while the discussions were ongoing, but due to other commitments at the time, my project was on hold so I did not contribute. As I've recently returned to flight I decided I wanted to pursue this idea so I searched the archives and downloaded the material that Bob had hosted on his site in my efforts to revive this project. But what does it do, you might be asking??? Well it limits the current to 9.5 amps to the propeller pitch drive motor. When the prop blades reach their end of travel and come up against the soft stops, the current begins to sharply rise and when the controller senses that it reaches between 9.1 and 9.5 amps it will cut power to the drive and illuminate an LED on the panel to indicate that it has reached end of travel. The prop can be reversed immediately if required without having to reset the circuit breaker. The function is the same in both directions of travel. It is a far better solution. As always Electric Bob, deserves the lions share of credit for this, Paul Fisher wrote the code, but there were many others that contributed to it as well. Forgive but it's late as I type and I don't have time to search through the archives again to find all of the names of those that contributed to this effort. But I thank you, as I stood on your shoulders to finish this. I've put the marked-up schematic and BOM as well as the hex code and all other pertinent files in a Google Drive folder at https://drive.google.com/drive/folders/1DeszjALTF6-L8dvuiy9jV7BY5q4t3G68?usp=sharing In this file there is everything needed to duplicate this project including the gerber files for having the PCB boards manufactured at far less cost than by ExpressPCB. These files were provided by ExpressPCB who made the boards for me, so they should be accurate. However rather than go through all that trouble, you can buy one of the spare kits that I've put together at cost. I had 6 boards, so I ordered the components for all of them. I built two of them so that I could do the testing on at least 2 to ensure it was going to work. Obviously, I've kept one for myself and I've already sold one of the kits. So I still have 3 kits for sale and one complete project. All of the PIC chips in each of the projects is programmed and as been tested in one of the complete projects on my plane, so there is no need to worry about learning to program these micro-controllers. It ended up costing me about $400 all in for this project due to the cost of getting the prototype boards made and shipped to Canada along with my error in ordering an overpriced and obsolete PIC programmer, before ordering the correct one at a more reasonable cost. So I'm asking $50 for the kits and $70 for the one completed controller. + $7 shipping to the US. The link above includes 3 pictures showing the kit contents, which are all individually labeled, as well as a populated board and a completed controller. I have a shear & brake here and a bunch of scrap aluminum so I banged up some small boxes that I've included free, but you will have to spend a few minutes tweaking them yourselves to make them pretty, or you could buy a real nice extruded aluminum case that is sure to make you faster. Not included is the mating D-sub connector and backshell as well as the panel mounted indicating LED and of coarse the switch, which you should already have with your prop. I already had these items for myself so I would've had to order these items for the extra kits and since some builders prefer crimped pins while some prefer soldered and there is a multitude of LED options to suit your panel, and I'm not getting into any sort of business here, I decided to just leave this to the individual. As this project is the product of this list, I'm offering up these kits here first, before I offer them elsewhere. I have no intentions on making anymore of these so when they are gone, the only way to get another is to use the files in the linked folder to build your own. Thanks, Todd Bartrim C-FSTB RV9 with tundra tires 13B turbo rotary


    Message 2


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    Time: 07:03:28 AM PST US
    Subject: Re: IVOprop current limiter project
    From: Emil Sr <papa11@centurylink.net>
    On 10/30/2018 3:10 AM, Todd Bartrim wrote: > I've successfully completed this IVOprop current limiter project that > designed by the collaborative effort of this group. After a bit of > tweaking of the code by Paul Fisher and switching the position of the > 2 zener diodes, it works perfectly. > For those that are unaware of what this project is; > The IVOprop as supplied uses a 10 amp circuit breaker to indicate > end-of-travel. Now the IVO is a love-it or hate-it prop but even those > that are in the love-it category will admit that waiting for a breaker > to trip is not a very elegant way to know when the prop has reached > it's end of travel. So over several years a project evolved on this > list originally being completely hardware based and then evolving into > this current micro controller based project. The original design was > built by at least 2 individuals but it appeared that despite the work > put in by members of this list, the micro controller based version had > not been built. I had read with interest while the discussions were > ongoing, but due to other commitments at the time, my project was on > hold so I did not contribute. As I've recently returned to flight I > decided I wanted to pursue this idea so I searched the archives and > downloaded the material that Bob had hosted on his site in my efforts > to revive this project. > > But what does it do, you might be asking??? Well it limits the > current to 9.5 amps to the propeller pitch drive motor. When the prop > blades reach their end of travel and come up against the soft stops, > the current begins to sharply rise and when the controller senses that > it reaches between 9.1 and 9.5 amps it will cut power to the drive and > illuminate an LED on the panel to indicate that it has reached end of > travel. The prop can be reversed immediately if required without > having to reset the circuit breaker. The function is the same in both > directions of travel. It is a far better solution. > As always Electric Bob, deserves the lions share of credit for this, > Paul Fisher wrote the code, but there were many others that > contributed to it as well. Forgive but it's late as I type and I don't > have time to search through the archives again to find all of the > names of those that contributed to this effort. But I thank you, as I > stood on your shoulders to finish this. > > I've put the marked-up schematic and BOM as well as the hex code and > all other pertinent files in a Google Drive folder at > https://drive.google.com/drive/folders/1DeszjALTF6-L8dvuiy9jV7BY5q4t3G68?usp=sharing > In this file there is everything needed to duplicate this project > including the gerber files for having the PCB boards manufactured at > far less cost than by ExpressPCB. These files were provided by > ExpressPCB who made the boards for me, so they should be accurate. > However rather than go through all that trouble, you can buy one of > the spare kits that I've put together at cost. I had 6 boards, so I > ordered the components for all of them. I built two of them so that I > could do the testing on at least 2 to ensure it was going to work. > Obviously, I've kept one for myself and I've already sold one of the kits. > So I still have 3 kits for sale and one complete project. All of the > PIC chips in each of the projects is programmed and as been tested in > one of the complete projects on my plane, so there is no need to worry > about learning to program these micro-controllers. > It ended up costing me about $400 all in for this project due to the > cost of getting the prototype boards made and shipped to Canada along > with my error in ordering an overpriced and obsolete PIC programmer, > before ordering the correct one at a more reasonable cost. > > So I'm asking $50 for the kits and $70 for the one completed > controller.+ $7 shipping to the US. > > The link above includes 3 pictures showing the kit contents, which are > all individually labeled, as well as a populated board and a completed > controller. > I have a shear & brake here and a bunch of scrap aluminum so I banged > up some small boxes that I've included free, but you will have to > spend a few minutes tweaking them yourselves to make them pretty, or > you could buy a real nice extruded aluminum case that is sure to make > you faster. > Not included is the mating D-sub connector and backshell as well as > the panel mounted indicating LED and of coarse the switch, which you > should already have with your prop. I already had these items for > myself so I would've had to order these items for the extra kits and > since some builders prefer crimped pins while some prefer soldered and > there is a multitude of LED options to suit your panel, and I'm not > getting into any sort of business here, I decided to just leave this > to the individual. > > As this project is the product of this list, I'm offering up these > kits here first, before I offer them elsewhere. I have no intentions > on making anymore of these so when they are gone, the only way to get > another is to use the files in the linked folder to build your own. > > Thanks, > Todd Bartrim > > C-FSTB > RV9 with tundra tires > 13B turbo rotary -----------I would like your built up controller, Please send address so I can send payment. thank you Emil Radtke


    Message 3


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    Time: 08:32:36 AM PST US
    From: Todd Bartrim <bartrim@gmail.com>
    Subject: Re: IVOprop current limiter project
    Hi Emil and others; Just so we don't clutter up the list with too much of this discussion unrelated to the development, I can be contacted directly at bartrim@gmail.com The easiest way to pay me is through PayPal using bartrim@gmail.com as the recipient. And of coarse I'll need your mailing address to ship it to you. Total cost for the complete controller with shipping is $77. If you would like tracking with it, unfortunately the post office wants an extra $5 more. While this was intended to be a DIY kit, I would be willing to assemble another kit if requested. thanks, Todd Bartrim On Tue, Oct 30, 2018 at 7:14 AM Emil Sr <papa11@centurylink.net> wrote: > On 10/30/2018 3:10 AM, Todd Bartrim wrote: > > I've successfully completed this IVOprop current limiter project that > designed by the collaborative effort of this group. After a bit of tweaking > of the code by Paul Fisher and switching the position of the 2 zener > diodes, it works perfectly. > For those that are unaware of what this project is; > The IVOprop as supplied uses a 10 amp circuit breaker to indicate > end-of-travel. Now the IVO is a love-it or hate-it prop but even those that > are in the love-it category will admit that waiting for a breaker to trip > is not a very elegant way to know when the prop has reached it's end of > travel. So over several years a project evolved on this list originally > being completely hardware based and then evolving into this current micro > controller based project. The original design was built by at least 2 > individuals but it appeared that despite the work put in by members of this > list, the micro controller based version had not been built. I had read > with interest while the discussions were ongoing, but due to other > commitments at the time, my project was on hold so I did not contribute. As > I've recently returned to flight I decided I wanted to pursue this idea so > I searched the archives and downloaded the material that Bob had hosted on > his site in my efforts to revive this project. > > But what does it do, you might be asking??? Well it limits the current > to 9.5 amps to the propeller pitch drive motor. When the prop blades reach > their end of travel and come up against the soft stops, the current begins > to sharply rise and when the controller senses that it reaches between 9.1 > and 9.5 amps it will cut power to the drive and illuminate an LED on the > panel to indicate that it has reached end of travel. The prop can be > reversed immediately if required without having to reset the circuit > breaker. The function is the same in both directions of travel. It is a far > better solution. > As always Electric Bob, deserves the lions share of credit for this, > Paul Fisher wrote the code, but there were many others that contributed to > it as well. Forgive but it's late as I type and I don't have time to search > through the archives again to find all of the names of those that > contributed to this effort. But I thank you, as I stood on your shoulders > to finish this. > > I've put the marked-up schematic and BOM as well as the hex code and all > other pertinent files in a Google Drive folder at > > https://drive.google.com/drive/folders/1DeszjALTF6-L8dvuiy9jV7BY5q4t3G68?usp=sharing > In this file there is everything needed to duplicate this project > including the gerber files for having the PCB boards manufactured at far > less cost than by ExpressPCB. These files were provided by ExpressPCB who > made the boards for me, so they should be accurate. > However rather than go through all that trouble, you can buy one of the > spare kits that I've put together at cost. I had 6 boards, so I ordered the > components for all of them. I built two of them so that I could do the > testing on at least 2 to ensure it was going to work. Obviously, I've kept > one for myself and I've already sold one of the kits. > So I still have 3 kits for sale and one complete project. All of the PIC > chips in each of the projects is programmed and as been tested in one of > the complete projects on my plane, so there is no need to worry about > learning to program these micro-controllers. > It ended up costing me about $400 all in for this project due to the cost > of getting the prototype boards made and shipped to Canada along with my > error in ordering an overpriced and obsolete PIC programmer, before > ordering the correct one at a more reasonable cost. > > So I'm asking $50 for the kits and $70 for the one completed controller. + > $7 shipping to the US. > > The link above includes 3 pictures showing the kit contents, which are all > individually labeled, as well as a populated board and a completed > controller. > I have a shear & brake here and a bunch of scrap aluminum so I banged up > some small boxes that I've included free, but you will have to spend a few > minutes tweaking them yourselves to make them pretty, or you could buy a > real nice extruded aluminum case that is sure to make you faster. > Not included is the mating D-sub connector and backshell as well as the > panel mounted indicating LED and of coarse the switch, which you should > already have with your prop. I already had these items for myself so I > would've had to order these items for the extra kits and since some > builders prefer crimped pins while some prefer soldered and there is a > multitude of LED options to suit your panel, and I'm not getting into any > sort of business here, I decided to just leave this to the individual. > > As this project is the product of this list, I'm offering up these kits > here first, before I offer them elsewhere. I have no intentions on making > anymore of these so when they are gone, the only way to get another is to > use the files in the linked folder to build your own. > > Thanks, > Todd Bartrim > > C-FSTB > RV9 with tundra tires > 13B turbo rotary > > > -----------I would like your built up controller, Please send address so I > can send payment. thank you Emil Radtke >


    Message 4


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    Time: 11:12:29 AM PST US
    Subject: Re: IVOprop current limiter project
    From: "user9253" <fransew@gmail.com>
    Good job Bob Nuckolls and Todd Bartrim and Paul Fisher. _ Todd, I have downloaded the files. One of them, "IVO Prop Current Limiter" does not have a file extension. I was able to open it with MS Word and read what I assume is "C" code. (I am not a programmer) Is Word the best program to use? If not what is the preferred program for opening that file? Also, the gerber files seem to be missing. A note on one of the pictures says to mount Q11 with the heat conducting side down. Does "down" mean that the heat conductive surface is NOT touching the board? If so, then I assume that a separate heat sink in necessary. Or is the aluminum case used as a heat sink? I am happy with PCB boards that I have ordered in the past from Elecrow in China. https://www.elecrow.com/pcb-manufacturing.html -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=484095#484095


    Message 5


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    Time: 12:13:54 PM PST US
    From: Todd Bartrim <bartrim@gmail.com>
    Subject: Re: IVOprop current limiter project
    Hi Joe; The file you refer to is indeed the C code that was written by Paul Fisher. You can read it by opening it with any text editor such as notepad, word and, gedit, etc. Or if you want to try compiling it yourself you can use MPLAB X IDE, from microchip.com (its free), bit you don't need to as Paul has already compiled it into a hex code for us. That is the code that needs to be programmed to the PIC12F683 microcontroller chip using MPLAB X IPE (also free) and a PIC3 programmer (not free). The Q11 mosfet is indeed mounted on the bottom side of the board with the heat conducting surface facing away from the board so that it conducts heat away into the aluminum case. Included in the BOM is a heat conduction pad that is sandwiched between the mosfet and the case. I used a #4 screw through the board, Q11, pad and the case. This is probably overkill, as I find there to be no detectable heat on the outside of the case when in operation. I think you would have to be constantly adjusting the prop pitch to see any heat build-up. Is there not a sub-folder showing called "PCB board Gerber files"? It is showing for me. If you can't see it then maybe it didn't get the same sharing permission as the root folder did? In that files are the Gerber files exactly as supplied by ExpressPCB, along with the original .PCB file. I had looked at elecrow ro build the boards bit I'm not familiar with Gerber files enough to ensure I could correctly convert the .PCB file. I didn't get these files until after I paid ExpressPCB for the batch of boards. I think the reason they supply them with each order is that they recognize that their service is uneconomical to use for production beyond prototypes. Todd On Tue, Oct 30, 2018, 11:18 user9253, <fransew@gmail.com> wrote: > > Good job Bob Nuckolls and Todd Bartrim and Paul Fisher. > _ > Todd, > I have downloaded the files. One of them, "IVO Prop Current Limiter" does > not have a file extension. > I was able to open it with MS Word and read what I assume is "C" code. > (I am not a programmer) > Is Word the best program to use? If not what is the preferred program > for opening that file? > Also, the gerber files seem to be missing. > A note on one of the pictures says to mount Q11 with the heat conducting > side down. > Does "down" mean that the heat conductive surface is NOT touching the > board? If so, then I > assume that a separate heat sink in necessary. Or is the aluminum case > used as a heat sink? > I am happy with PCB boards that I have ordered in the past from Elecrow > in China. > https://www.elecrow.com/pcb-manufacturing.html > > -------- > Joe Gores > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=484095#484095 > >


    Message 6


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    Time: 12:50:19 PM PST US
    Subject: Re: IVOprop current limiter project
    From: "user9253" <fransew@gmail.com>
    Todd, Thanks for the explanation. You are right about the Gerber files. The other 7 files have pictures. I missed the Gerber file folder because I was looking for a picture. My bad. I have now downloaded the Gerber files. I use "Eagle" for making schematics and boards and generating Gerber files. Unfortunately it is not intuitive or user friendly unless used frequently. If I do not use the program for a long time, I have to relearn it. There have been threads in the past on this forum discussing other easier to use software. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=484099#484099




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