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  1. 7tronics

    SWITCH Vehicles Light EV Educational kits

    Those who purchase SWITCH kits have a closed community available to them. If there are key questions for those teams with SWITCH kits, this is a public forum for replies.
  2. 7tronics

    SWITCH Vehicles Light EV Educational kits

    :roll: References on SWITCH EVs - map of current SWITCH Vehicles customers: The Switch Lab™ | Customers utilzing the EV Kits & Curriculum - This High-Performance Electric Vehicle Kit Can Be Built in a Week - Switch Vehicles™ Instructor Training Workshops | Train the Trainer has downloads to...
  3. 7tronics

    SWITCH Vehicles Light EV Educational kits

    SWITCH Vehicles has had their 3 wheel, 2 seater EV kit available for at least 8 years. Several Light EV Tech teams are interested in a forum to exchange good practice, and things to avoid, in evolving programs using the SWITCHlab and other educational kits from the company. The Switch Lab™ |...
  4. 7tronics

    CycleBoard and other Light EV demonstration Karts

    [Moving the question from bottom of the page to the top:] Has anyone else put together similar escooter demonstration of Light EVs as people + package personal transport? Our local Electric Vehicle Association group, TEVA of NC, updates demonstration vehicles for educational EVents every...
  5. 7tronics

    Who's Crazy enough to get an Optibike?

    Who's crazy enough? We are, on our second in fact! We, my family who do Light EV Tech training, now have our 2nd Optibike. First a 2007 Model 600 which has the original NiMH 36v battery pack. With special care and cycling of the NiMH battery, it is doing very well. 70-75% of original capacity...
  6. 7tronics

    An Unplanned Motor/Wheel assembly Test Stand

    Yes, several people have privately mentioned you need "road" tires for the Kinetic or Saris trainers, rather than trail/knobby tires. Also, neither training stand has any calibrated power output meter.
  7. 7tronics

    An Unplanned Motor/Wheel assembly Test Stand

    Our Triad EV Assn along with the Light EV Assn are doing some ebike testing on test tracks in Western NC. At times we would like to have a "standardized" test and after seeing the Motor/Wheel Test Stand in the posts here, we started looking around for something like that which would: Provide a...
  8. 7tronics

    Battery Capacity Tester Circuit

    So sorry we had not seen this post for so long! The key to using a Grin Tech Satiator with the CBA Charge Controller is to set the CBA to ignore the periodic current interruption the Satiator does to check the state of the battery charging process. The CBA Charge Controller software uses the...
  9. 7tronics

    Anyone know about the COBOX Wattmeter - Power Analyzer?

    After several more attempts to contact the people at cobox-ebikes.com, we have given up. The PayPal order was never received after 5 days, so we cancelled that as well. Looked like a nice product, sorry the e-mail and PayPal order can't get a response on the promising COBOX Wattmeter. As...
  10. 7tronics

    Anyone know about the COBOX Wattmeter - Power Analyzer?

    Hmm, striking out here! 1) No one has responded to our requests of COBOX-ebikes.com including a PayPal order! 2) the Neptune 15 tech support responded that their device must be the BMS for the pack and won't work unless the cell connections from at least 10 cells are connected The Cycle...
  11. 7tronics

    Motor selection: sortable table in the Wiki - now 88 entries

    Tx for replies we will get back to this. Sidetracked by promising use of hoverboards as portable, readily instrumented demo of a Light Electric Vehicle! With a HoverKart 2 or similar frame on top, this LEV can be tested by just about anyone over 10 years old regardless of their ability to...
  12. 7tronics

    Anyone know about the COBOX Wattmeter - Power Analyzer?

    The Speedict.com Neptune line is the closest we could find to the COBOX Wattmeter for some of our educational demos. We have ordered each version COBOX Wattmeter and will post results once we are able to test them. If the Speedict Neptune can be setup without attaching individual cell...
  13. 7tronics

    Speedict neptune lite

    Thank you for the review of the Neptune 15! We would like to incorporate it into designs where the individual cell leads may not be available. Can this Neptune 15 be setup without connecting anything to the battery pack but the + and - discharge terminal leads? How can a separate charge and...
  14. 7tronics

    Motor selection: sortable table in the Wiki - now 88 entries

    We have a Crystalyte hub that a local experimenter installed into a school prototype vehicle at least 8 years ago. Now we have inherited the hub motor, CA v2.1 and a Lyen 124110 PWM controller. In order to setup a demo of PWM motors on a stand for LEVA Technician class in mid October, we are...
  15. 7tronics

    Battery Capacity Tester Circuit

    The setup described above works for 48v max with a West Mountain CBA IV, West Mountain CBA Charge Controller, Grin Tech Satiator, and a Windows PC with at least two USB 2.0 ports. We did find some quirks using the West Mountain CBA software: "cycle" count in West Mountain software counts...
  16. 7tronics

    Battery Capacity Tester Circuit

    We have found a few quirks in setup of the West Mountain CBA IV, CBA Charge Controller, and Grin Tech Satiator as a Semi Automated Battery Analysis (SABA) the default configurations of CBA Charge Controller have a 55v limit, and that limit IS enforced when encountered! BUT there is a mod...
  17. 7tronics

    Battery Capacity Tester Circuit

    As part of pulling together a semi-automated battery tester (SABT) I am testing components which are UL listed for a small commercial environment to expand upon those who already own a West Mountain Computerized Battery Analyzer (CBA). A question: ?Has anyone coupled a West Mountain CBA, West...
  18. 7tronics

    Proposal: Answering Questions on the Wiki https://endless-sphere.com/w

    Wiki link problem (is this where I should post?): On the Open Source Controllers section here, the link to "Smart EBike motor controller" seems to have moved here to GitHub.
  19. 7tronics

    Cycle Analyst V3 preview and first beta release

    I'm posting a link here to one seeking advice on which version of Cycle Analyst v3.0 to purchase for installation on an ELF + Kelly KBS Controller. To get out of this long forum, the question about which CA to order is posted here.
  20. 7tronics

    kelly kbl controller testing

    I have had some experience with the CA v2.3 from other's ebikes, in person and in the LEVA ebike technician course, and am planning to install a CA v3 on the Organic Transit ELF. Does anyone have experience with the CA v3 on the Kelly KBS Controller and with a motor not directly connected to the...
  21. 7tronics

    How Much $ is Your Public Charge Station???

    In Central NC many of the newer charging stations are Chargepoint stations and they do NOT accept a NEMA-5 or NEMA-6 -- you must have a J1772 connector and the basic charge control logic that is associated with that connector. Now there are designs on how to create your own adapter and at least...
  22. 7tronics

    inflating tyres without air ?

    Has anyone tried the Kenda Airless innertube replacements? So far the only place I can find them available in the US is here: [url=http://www.indemedical.com/EZN-Airfree-Innertubes-Inserts_p_1482.html]IndeMedical.com[\url] Past attempts at airless tires/tyres have been way too squishy for my...
  23. 7tronics

    How to rebuild Currie 24v RTMB pack?

    Sorry for delay in reply. Before opening up the RTMB plastic wrapped Li-Ion pack inside the aluminum housing, I decided to check with a GT Power A8 charger. It hadn't dawned on me that the A8 could test these larger ebike packs as I got the charger for much smaller nominally 12v ham radio Li and...
  24. 7tronics

    LiFePO4 batteries in the 12 volt "gel cell" format

    As soon as the integrated BMS version of above listed here: http://www.batteryspace.com/LiFePO4-Prismatic-Battery-12.8V-20Ah-256Wh-10C-rate-with-LED-Balancing.aspx has a significantly lower premium for the integrated BMS I'm there! $55 per 12v "AGM brick" for the BMS is a bit too high. Nice as...
  25. 7tronics

    LiFePO4 batteries in the 12 volt "gel cell" format

    OK, an update: Clean Republic CR1210 bamboo encased "12v 10ah" measure out to 9.5AH at C/5 discharge rate on GT Power A8 (WMR CBA IV on order). After 5 charge/discharge cycles on two different ebikes (Giant LaFree and Currie eFolder with 300w motor) still measure at about 9.5AH capacity. They...
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