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    • July 20, 2017 3:10 PM EDT
    • Steve:

       

      PTC means "Positive Temperature Coefficient"... PTC is not really a device but a description of an attribute of a device.

      You probably have a resistor that has a PTC... like the orange PolySwitches we had on our Aristo equipment... too much current it heats up (Positive Temperature), and the Coefficient of resistance increases.

      The term "thermistor" is often applied, a THERMalresISTOR .... (cute huh?)  https://en.wikipedia.org/wiki/Thermistor

       

      (so a short circuit, lots of current, makes heat, the device increases in resistance and limits the flow of current).

       

      Note these gadgets normally do not completely cut the flow of current, just reduce it to a safer level... some current has to flow to keep it hot enough to limit the current.

       

      You can also have a thermal circuit breaker, but those are to sense heat from the cells, not really current. These are normally touching one of the cells. (but the problem is that if a different cell shorts and heats up, it takes a while for that heat to migrate to where the sensor is)

       

      Thermal cutouts are normally good for a sustained high current condition, either caused by too heavy discharge or too heavy charge.

       

      Again not really good for "suicide", where one cell goes bad, often reduces to a short circuit or reversed polarity, thus way too much current flowing through it and a lot of heat... and a lot of heat in lithium batteries normally results in fire.

       

      Reading Don's post, his "suicide" seems to be that the pack won't function after a short, probably tripped the protection PCB.

       

      So I'm in line with Michael, he's got more expertise than I have in batteries (and I have been using and learning for a long time), but would not mind hearing about MTO's PCB since it's not mentioned anywhere on their web site. I have a hard time comprehending how 2 packs can work with each other if their magic PCB's are not connected and communicating though.

       

      Greg

       

       

    • July 20, 2017 2:18 AM EDT
    • Industrial, Commercial and Retail batteries internationally are provided with PCM's that meet the requirements under the auspice of IEC SAFETY recommendations for travel and use for at least five years or better.

       

      So far as I know and have realized, PCM's incorporate EXTERNAL short circuit protection. A self resetting device known as a PTC provides short circuit protection by creating HIGH resistance when copious amounts of current are rendered and later when the short is removed the PTC drops back into LOW on resistance monitoring.

       

      The "Suicide" comment alluded to above is derived from INTERNAL failure modes leading to a short. PCM's have little to no effect and accordingly offer no protection under said circumstances.

       

      A resettable fuse opens in the event of elevated temperatures around 195*F.  

       

      Sleep mode opens the circuit when you run the battery down below the preset voltage safety level, typically a multiplier of 2.2V per cell. 

       

      Michael 

    • July 19, 2017 10:12 PM EDT
    • Does that protect the batteries when charging in parallel? 

    • July 19, 2017 9:32 PM EDT
    • Hi Steve, it is all about safety. Do you remember reading Kevin Strong description of a lithium battery commits suicide when the pack gets shorted or when the red and black wires accidentally touch. 

      Well we have eliminated that problem for you and me. Using an MTO battery pack it will be protected during a short and will recover after you fix the shorted wires. Pretty neat.  

      Thanks for asking, Don

    • July 19, 2017 2:08 PM EDT
    • Don, on your RCSNE website, you mention that these MTO batteries have a "next generation battery Protection Circuit Module  (board).  Can you describe it and how it works?

       

      What sort of magic does it preform?

    • July 19, 2017 1:54 PM EDT
    • the positive boon, as opposed to the boon + dog + L

      of course.

       

      Gerg  (yes I am spelling my name a special way for Rooster)

    • July 18, 2017 8:50 PM EDT
    • Greg Elmassian said:

      Ha ha! That's an awfully big horn for such a little loco!

      Seriously, seems to work well, and if we get the firmware changed so the same transmitter runs both the HO and the LS, it will be a boon to many people.

       

      Greg

       

      What kind of Boon?

      Dog

      Half or Full

      Warren

    • July 18, 2017 8:28 PM EDT
    • Greg Elmassian said:

      Ha ha! That's an awfully big horn for such a little loco!

      Seriously, seems to work well, and if we get the firmware changed so the same transmitter runs both the HO and the LS, it will be a boon to many people.

      Greg

       

      Yup, you're right, Greg....  That's the only negative about the system in the Hartland Mack Phil Jensen 'bash.  Should be more of a "beep-beep" rather than a blast...  

       

      It runs about 8 hours on a 2600 mAh 11.1 volt Li-ion battery......  

    • July 18, 2017 6:53 PM EDT
    • Don, elsewhere,  you mentioned that these MTO batteries have a "next generation battery Protection Circuit Module  (board).  Can you describe it and how it works?

    • July 17, 2017 5:08 PM EDT
    • Ha ha! That's an awfully big horn for such a little loco!

      Seriously, seems to work well, and if we get the firmware changed so the same transmitter runs both the HO and the LS, it will be a boon to many people.

       

      Greg

       

    • July 15, 2017 10:12 AM EDT
    • Greg Elmassian said:

      {Snip}

      I beta tested the HO receiver, I have it running in an eggliner, it's pretty cool.

      Greg

      Greg....  I would agree about the HO receiver....   Here's an installation I did a couple of years ago when it first came out.  It still runs great.. .

       

      https://youtu.be/Y2XoohBzBaA

    • July 15, 2017 12:11 AM EDT
    • The USB dongles are coming Don, just communicated with JK and Navin a couple of days ago.

       

      I'm going to try to do some videos of the sound so people can decide which sound files to download.

       

      I beta tested the HO receiver, I have it running in an eggliner, it's pretty cool.

       

      Greg

    • July 14, 2017 2:12 PM EDT
    • Wish I'd seen this thread sooner.  I even looked on your website in June,  Don, but didn't see any reference to REVO.  I'll call you next week.

    • July 13, 2017 11:52 PM EDT
    • Hi everyone, I thought I would share with you that my little business since January 3, 2017 when I started selling the Revolution again, has sold/installed 64 systems. Mostly on-board receivers with transmitters.  The product works well, simple to operate and free sound. Such a good deal! 

      I keep asking Navin for the USB programmer and when the HO receiver will be made.  If sales stay strong maybe we will see these items.

      Thank you all for your support.

      Don

    • July 1, 2017 12:22 PM EDT
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    • June 28, 2017 9:12 AM EDT
    • Hi Guys, the RailPro module has a name. LM-3S-G. List price is $180 with sound. I hope that price holds.  Output to be 4-6 amps with a 8 amp start up surge. I do not know how long you can keep that surge before shut down. You can monitor your on-board battery voltage, current draw and temp from the info icon on the display.  

      Greg, the display is very bright at 50% brightness and will last 8 hours. At 100% brightness indoors is unnecessary, at 100% outdoors in direct sunlight it fades away. If I stand with my back blocking the direct sunlight it is readable. This will become an issue for you sun lovers. I will ask Ring at 100% brightness what is the expected battery time. Ring Engineering will be looking at the cost of an suitable outdoor screen. Luckily this is a plug assembly to make a quick change. There will be new videos created using G scale locos running indoors and outdoors.

      Dan what brightness do you use when you run outdoors with the RailPro?

      If development units are approved shortly, maybe we will see a demo in late July.

      Don

    • June 27, 2017 1:19 AM EDT
    • Looking forward to it's release!

    • June 20, 2017 2:14 PM EDT
    • Looks nice, would like to see the display in the sunlight in a video. Most color touchscreens cannot even bee seen.

      Battery life with the screen at full brightness?

       

      Greg

    • June 20, 2017 10:44 AM EDT
    • Hi All, I was hoping for the new RailPro Large Scale  module this week to show off at the O Scale Convention. But it is in development phase and they have two working prototypes. It takes a while to upscale the HO LM-3S but they are getting closer.  According to Ring Engineering we will be impressed with the control and new high end sound system.  

      As soon as I received my demo unit I will post it.  Don

    • June 9, 2017 11:28 AM EDT
    • GLX now has a replacement bell for the Aristo Pacific....part # 21300-25

      The part looks better than the original....it comes in black, but can be painted to suit your locomotive.

        Fred Mills