Full Members +
  • Content count

  • Joined

  • Last visited

  • Days Won


Everything posted by Rehab1

  1. Omg I just tried to reconnect the batteries on my ACM 1600 to give them a charge and all hell broke loose! Burned my hand, melted the connector! All of the cale connectors are simple pull and play. What the hell happened?
  2. I have no idea! This project is getting me down! I am ok. Just a slight electrical burn. Could be worse! At first I was afraid to look at my hand but most of the black soot came off. Feel sorry for those that suffer 2nd and third degree burns all over their bodies!
  3. I wished I could test the range of my GW 1600! Right now I'd be satisfied with just for a ride around the block! That is great mileage! My 1600 will go....... as far as I can carry it!
  4. Sorry for the late reply. I've been in the woods. That is wonderful news! Enjoy!
  5. Logical! I emailed Battery University yesterday to inform them about some of our BMS and LiPO concerns in the EUC community. I know they are very busy. Will be interesting to see if they personally respond. Would be great to have an open channel to their talent!
  6. Oh you will be depressed but again your beautiful territory has many more perks! I know real estate is expensive in Calif compared to my area. I moved an employee from Downy Calif to Toledo 20 years ago. He purchase 3Xs the house for the same price. The neighbor's house for sale is selling for $550K. 4000 sq feet.
  7. Unfortunately as you stated the BMS shuts the whole wheel down with a voltage drop. Bad outcome! The more I research this subject the more I am elucidated on the ongoing R&D in this area. AMS, an Austrian provider of analog ICs and sensors, has introduced a simpler and more robust method of monitoring and balancing cells in lithium-ion battery systems.The company has implemented the new architecture in a highly integrated chip called the AS8506, that performs distributed cell monitoring and balancing operations for stacked cell modules, including Safe Operating Area (SOA) checks and passive or active cell balancing. It’s designed to work with all lithium-based cell chemistries, as well as EDLCs (aka supercaps or ultracaps). We know that In conventional systems, a complicated algorithm running remotely on a microcontroller decides which cells have to be balanced. The new architecture supported by the AS8506 can control individual cell balancing locally enabling designers to implement a more streamlined cell management system that eliminates the host controller, complex software and vulnerable serial communication links. An analog circuit in the AS8506 compares up to seven cell voltages ( IC would need to be enhanced/modified to monitor all the cells in our EUCs) contained against an internal or external reference with an accuracy of 1 mV, to support cell balancing and cell monitoring functions. Cell voltage measurements can also be digitized with an accuracy of 5 mV and reported to a host controller. “The AS8506 marks a breakthrough in cell monitoring – not an incremental improvement on previous cell monitoring ICs, but a completely new approach”, said Product Manager Manfred Brandl. “By offering local cell and temperature monitoring, the AS8506 gives system designers a simple and robust means to implement a battery management system, with just a simple microcontroller required for basic system functions.” I am certain that the AS8506 or similar ICs would inflate the cost of EUC production models. The question is: Would members be willing to pay an additional premium for increased safety?
  8. But... that's a 5-pin connector? Vcc, GND + 3 hall -wires, I guess? There's a gazillion different connectors out there, if you're worried about it coming off, you could try replacing both ends with something that has plastic pins to lock in place: Definately a 5 pin connector! Yes each hall sensor has 3 legs, V+, V- and data (left to right respectfully). The (3) red V+ and (3) black V- legs are soldered together to form 2 leads. The (3) data legs...yellow, green and blue remain separate....totaling 5 leads .
  9. They were gone. if you ever get a drone Canadian women will need to be on High Alert! The inside is beautiful. Suppose I could take the Passport inside and get some footage while knocking over some antiques. . I am afraid they are asking to much. Our homes are built on engineered wood foundations. Never a cold basement and suppose to last longer than concrete or block foundations. The caveat is there needs to be proper drainage. My home was built on a hill so we don't need a sump pump. Their home is on level ground and have 2 sump pumps that run constantly. They had to install a generator in case of power failure as their basement flooded in the past.
  10. I was just researching this subject at Battery University. High-voltage battery packs require careful cell matching especially when drawing heavy loads or when operating at cold temperatures. With multiple cells connected in a series, the possibility of one cell failing is real and this would cause a failure. To prevent this from happening a solid state switch that would bypass the failing cell and allow continued current to flow is an option. Multi-cell battery protection systems are not new. If single cell failure can disrupt the entire battery pack why not incorporate IC technology that would cut the defective cell out of circuit if the cell is being overcharged or over-discharged?
  11. As you stated unlevel surfaces cause the most precession. To hold a tight radius as the wheel spins around your body you may have to create a parabolic surface with a gentle 1 degree inward slope. The wheel would slowly encroach on your position while circling but should maintain a symmetrical pattern. ( I know... sounds expensive!) Experimenting with the placement of various weights on your NB might be an option but as you have stated in the past any slight change in the dynamics of your wheel causes a disruption in your proprioceptive awareness and timing.
  12. Thanks! They never had to worry as I would plow their drive, the one next door and mine. With new neighbors coming I am backing away from doing that volunteer work anymore.
  13. Glad you just walked away with a few scraps! It is interesting the amount of data we acquire as members are putting higher mileage on their wheels! The fact that a single cell can go bad and cause a shut down is disturbing! I was brought up to respect preventative maintenance! So where does the preventative part enter into this equation? ( I am not a battery expert either).
  14. Great idea! Wanna help! Unfortunately the property I am on is not mine. He would not care if he saw me tripping over his dead branches but a group of strangers might be an issue. I looked again.., nothing. I was able to use the new Mavic and get some footage of a neighbor's home they are putting up for sale next week. It was a bit windy today and some of the footage shows it but the shoot was for free and they like it!
  15. Since @meepmeepmayer posted his topic 'One more Gotway Warning) ACM Died on Me' I decided to perform an autopsy on my new ACM 1600. During my complete tear down I have found some concerns along the way about the wiring, inadequate Mosfet heat sink, and the the ability for moisture to infiltrate key electrical components of the ACM. Many of the 24 images and videos have already been posted under the 'One more Gotway Warning' topic but as my destructive journey continues I thought it best to continue my updated posts here. I sincerely hope some useful knowledge will be gained from this endeavor. I also hope I can put the wheel back together again!
  16. Awesome video as always! Fun watching the kids applauding! BTW is there a dark side we should know about?
  17. Careful Marty! You've had enough trauma for one day!
  18. I decided to get creative and compare the last known sighting of Mavic shown on my IPhone with Google Maps on my laptop. Once I was able to sort out and compare the topography I placed the cursor over the area and Google gave me the coordinance. I will give it one more try.
  19. Past pilot. It has been over 8 years since I last flew. Unfortunately a family tragedy lead to the decision.
  20. Dang I read somewhere that TomTom was associated with the company I just researched it and cannot find any association so I stand corrected! I like your tracker and the idea you can replace the battery! I ordered one for the P4. Will be nice to test out each version.
  21. Let's analyze your sore legs! Could it be that you had 2 separate accidents on your wheels a week before the mountain rescue? RX: Relax in an easy chair with your feet up propped this weekend while consuming large quantifies of liquids
  22. Awesome! Your small investment will afford you the luxury of being rescued first if your group encounters another unfortunate search and rescue! You have my permission to @Marty Backe as you fly to safety!
  23. I have my smart cap on tonight! You just want me to buy the Garmin and once it is determined the extra weight crashed my new Mavic I will just hand it off to you!
  24. Great ideas but the best way is still to have a GPS locating beacon. (Buy one @Marty Backe!) Knowing the exact GPS location is extremely helpful to helicopter pilots. This method is used daily during Life Flight emergencies. 25 years ago I helped test out the first system in Toledo using my chopper. When an ground ambulance arrives at the accident scene and it is determined an AirVac is necessary the medics radio out their longitude/latitude coordinates to the pilots. The pilot or copilot enter the coordinates into their GPS system, fly to the exact location and if a safe perimeter has been established on the ground they land. Spotting a person in the woods or mountainous region from the sky is extremely difficult. You cannot fly low for a better view in danger of hitting power lines or trees (power lines almost killed me and a police officer on board years ago). Also if an engine failure were to occur there is not enough altitude to perform an safe autorotation. A locator beacon helps the helicopter pilot and spotter to reach the rescue scene in an expedient fashion where time may determine between life and death. Buy the beacon Marty!!!