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  1. MJSfoto1956

    Which party is more representative?

    How representative are the Representatives? The demographics of the U.S. Congress, broken down by party. Discuss. (you know where I stand)
  2. MJSfoto1956

    Re: E.R.T \ Alan Hu nightmare.

    With the current administration you are more than likely going to get a response like: "Rules? We don't need no stinkin' rules"
  3. MJSfoto1956

    My design for a 100Ah 7.2V module

    So I'm starting to design my second battery pack. I'm toying with using Queen Battery QB26800 6800mAh li-ion cells. I've come up with a modular solution that uses a 2s15p layout resulting in a 7.2V 100Ah module. Ten of these modules in series would give me 72V 100Ah, which is my target battery...
  4. MJSfoto1956

    POLL: Dauntless vs. TheRealDonaldTrump? (humor)

    Some people are saying that our very own Dauntless is actually Donald Trump in disguise. Too bizarre to be true? Well, consider this: they both are masters at the put-down. They both love to taunt their opponents. They both use name-calling with abandon. Both are masters at gas-lighting. Both...
  5. MJSfoto1956

    QSmotor/SiAecosys/Taizhou CT-22 Programming. 1 of 8

    Not sure where to put this, but I'm going to herein attempt to document the steps needed to program a QSmotor SiAecosys Taizhou CT-22 digital speedometer, which can, and is, used for eBikes, eMotorcycles, and eScooters. The SiAecosys CT-22 is an ostensibly "high end" speedometer in that it is...
  6. MJSfoto1956

    Xiaoxiang app settings 101

    For those who are using (or considering using) the Xiaoxiang app to control their BMS's, here is a quick tip to get the most out of it. There is a config setting that allows you to "tell" the app what constitutes 80%, 60%. 40%, and 20% battery usage. The default settings are "fine" as far as...
  7. MJSfoto1956

    21s for next battery design

    I have already started designing the layout of a "next generation" battery for my eZuma project. Currently my bike is using 20s17p, which is just adequate but it fit without any issues in the existing battery box. I'm aiming for 21s26p which will require some mods to my center stand and supports...
  8. MJSfoto1956

    good source for custom machine work in the USA?

    I need a custom adapter fabricated to the following specs: Anyone know of reliable sources for custom machine work in aluminum in the USA? Michael
  9. MJSfoto1956

    FOC? PWM? delta vs. Wye? all explained in 3-class QA format

    Q&A: BLDC Motor Control, 3-part class questions: https://www.eetimes.com/author.asp?section_id=36&doc_id=1331377&page_number=1 https://www.eetimes.com/author.asp?section_id=36&doc_id=1331377&page_number=2 https://www.eetimes.com/author.asp?section_id=36&doc_id=1331377&page_number=3
  10. MJSfoto1956

    Do I get a prize for the most obscure diagnosis ever?

    I'll let you be the judge. Yesterday I installed a pair of "improved" turn signals over the cheap LEDs that came with the bike. The blinkers are not only brighter but cover a much broader angle for oncoming cars. So it really was an improvement. And oh, they were incandescent -- but I wasn't...
  11. MJSfoto1956

    Programming APT AE96600 controller from QSmotor

    OMG. Being desperate, I ordered an APT AE96600 controller directly from QSmotor last week. Arrived last night. They programmed it specifically for my motor (or so they claimed) so it was basically "plug and play". What a difference! While the AE9600 is ridiculously too heavy and big for an eBike...
  12. MJSfoto1956

    Inside look at new 50h QSmotor V4 8000W 13" hub motor

    Being the curious type, I thought I'd take a peak at what the insides of my new 50h QSmotor V4 8000W 13" hub motor looked like. Here's what I found. Enjoy! Note: if there is something you want me to measure or photograph while this puppy is open, let me know. Michael
  13. MJSfoto1956

    For CA HC: can single phase be used instead of hall magnet?

    So I'm considering adding a CA-HC to my bike's mix. But one question eludes me: can I use a single phase from the controller instead of the supplied hall magnet speed sensor? In theory is "should" work as that is what the standard 6-pin CA-DP uses. Or should I just purchase a CA-DP and hack the...
  14. MJSfoto1956

    Will a Domino throttle fit inside?

    Background: I have a typical cheap Chinese 2000W 72V scooter/moped which I am slowly upgrading. It came with a "twitchy" throttle. I would love to replace it with a Domino but the scooter controls are all contained in a single housing (as shown in the attached photo). Does anyone know if a...
  15. MJSfoto1956

    Does a cheap DC-DC converter have significant parasitic draw?

    Watching every Amp, so I have this question: Does your typical cheap Chinese DC-DC converter have any significant parasitic draw even when nothing on the DC side is active? I'm talking about this kind of cheap ubiquitous converter seen everywhere: M
  16. MJSfoto1956

    The Easy way to mount a tire to a hub motor

    While I've used this "zip tie" tire mounting technique on my ICE bike previously, I had never done it with a hub motor. The key thing I discovered was creating a 2x6 platform to raise the motor shaft off the ground, thereby allowing the process to proceed as normal. Start by zip-tying the...
  17. MJSfoto1956

    Xiaoxiang 300A "smart" BMS settings?

    So I have a Xiaoxiang 150A "smart" BMS purchased from Denzel Motors which I am very happy with. The Bluetooth app allows you to set various options, two of which I'm not 100% clear on (see highlighted region on photo). N.B. My battery pack is 57Ah (17 * 3350mAh), so should I set either...
  18. MJSfoto1956

    Experience with Frogzskins for venting?

    Anybody have any experience with using Frogzskins for venting your battery box? Seems to be an ideal solution for us. see: https://www.amazon.com/Straightline-Performance-Frogzskin-Universal-Rectangle/dp/B003CJW8LK Michael
  19. MJSfoto1956

    Petersen Museum Electric Motorcycles Exhibit

    I was in Los Angeles over the weekend to celebrate my daughter's 30th birthday and I wanted to see the Electric Motorcycle Exhibit at the Petersen Museum in downtown LA. While there are only 20 EMs on display I must say I was impressed at the detail that goes into these machines. See the...
  20. MJSfoto1956

    Phase change material panel concept

    As some of you know, I am in the process of rebuilding/improving an AliExpress battery pack. One of the design details I came up with was to separate the two banks of 18650 cells with lightweight extruded greenhouse polycarbonate. See the photo below. Originally I was thinking of creating two...
  21. MJSfoto1956

    Any idea what this toggle is for?

    I just "inherited" this combination switch with the usual horn/headlight/turn signal switches. But there is an additional toggle which I'm not familiar with. Any ideas? Perhaps cruise control? Michael
  22. MJSfoto1956

    Confirmation: 20s BMS --> 2x 10S packs

    Purely hypothetical, but I imagine someone has already done this before. Let's say you have two 10S battery packs without BMS's. And let's further assume you just inherited a spare 20s BMS. So now you want to charge the two 10s packs with your new 20s BMS. Just need an adapter cable, right? So...
  23. MJSfoto1956

    overall friction penalty: 80% less top speed?

    If one has a 13" hub-motor whose non-loaded max RPM would (theoretically) take a moped/scooter to 100kph, what would a reasonable best-guess calculation of the actual speed of such a moped/scooter on level ground be? 80% less? 75% less? Thanx for any insight in advanced. M
  24. MJSfoto1956

    My design for a 72V split pack

    So I've been back and forth regarding the "BMS vs. No BMS" debate. One of the things I like about being able to split a 72V pack is that it somewhat simplifies using the pack for emergency power in that there are a plethora of inexpensive 36V inverters to choose from, whereas 72V inverters are...
  25. MJSfoto1956

    AliExpress battery pack unboxing (for my eZuma project)

    So I took a chance and purchased a 57Ah Li-ion battery pack from an AliExpress vendor touting 8 years experience. The nice thing was how easy it was to work with them -- I requested a custom configuration not shown on their web store (i.e. 20s17p/120A BMS) and within a day they gave me a link...
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