Endless Sphere

Greetings ES peoples - Gosh, it’s been 5 years since the repair, and I’m here to report that’s about how long it lasts. Yes, it’s been 5 epic years and 10,000 miles before the RWD blew out the bearings last week. It started as a vibration, a slight flutter, like I was riding over a well-worn road, b...

Hello iA - This is an old thread for sure. I just happened to have that charger right next to me for a completely different use. I took the bezels off both ends to evaluate, and I concur - the PCB is firmly emplaced. The unit appears to be a one-way construction with no plan to service it. In the po...

Hi Pancho – Oye, ¿cómo va? Thanks for the Schematics amigo! Searching Google on "xc866 controller MBC", I found an Infinion Spec Sheet: "8-Bit SAA-XC866". MBC means "Monitor & BootStrap Loader Control" and is on Pin-1. The MCU Reset is on Pin-38. Confirmed on my schematic that XC does connect to Pha...

Hi Pancho – Apologies for the late reply; I was busy last night doing what I do – write code. But now I’m here for you. Trivia about the PCB: The FET: http://www.irf.com/part/75V-Single-N-Channel-HEXFET-Power-MOSFET-in-a-TO-220AB-package/_/A~IRFB3607 RDS(on) = 9 mOhms!! 75V limit. 140W (via Digikey)...

Hi Pancho – It is an old thread! :) Could you take a nice clear picture of both sides of the PCB please? I can try to answer some of these: 1. Unsure; picture is worth a 1000 words 2. Correct on my schematic. 3. Unsure, other than monitoring Phase C. 4. EBS = Electric Brake Switch. Typically this is...

do you think it is possible to modify a "Meanwell RS-150-48" (Out: 48V 158W, fanless) to provide 300V DC Output-Voltage ? Hello Runout – Thank you for the question - however I’m not an Electrical Engineer; my forte is Electromechanical Engineering which is a bit more on the component design and int...

Shingles On Thanksgiving 2014 – I began to have symptoms of head/chest flu that grew immediately worse of the next couple of days, and it really laid me out for about three weeks. By the time I started feeling normal again – about December 19th, I had contracted Shingles which evidently likes to at...

Spring Update 2015 New Headlights Some time ago during the last winter I upgraded the headlights to throw a lot more light onto the road. Previously the dual Cree UniqueFire 300 Lumen setup just seemed to be getting dimmer with time. I swapped these out with a pair of high-powered triple-LED flashl...

Analysis of typical Radial Flux Iron-Core Motor having variable winds Concerns & Declarations: Claimant posits motors of the same manufacture/series having the same load and speed and wheel diameter will use the same power regardless of the number of winds. Effects of Controllers, Batteries, Cablin...

Thanks Richard :) Understood; I will try to get a better picture of that over the next few days. Warrantee? We don't need no stinking warrantee :wink: Although I am super curious if the 1500 Lumen would have had the same voltage or maybe another LED; I'll take a look next time I'm at HD. A future so...

2000 Lumen Headlight Assembly Notes Preamble : My old LED headlights failed in an attempt to brighten them. Needed replacement ASAP. Need was worth more than the cost of waiting for best price to arrive. Solution was total MacGyver . Note : Repeating some previous information in order to create a c...

Tying in another thread for reference: E-bike Roadkill? No, just Roadstunned I hit a raccoon tonight on the way home; not at all thrilled :( I was on a short stretch of road that divides the urban part of Redmond from the rural part, and there's a moderately large stream ("Bear Creek") in close prox...

John : Hiding? Actually I work for a living, and when I’m not – I play. Been busy: This weekend I went up to Mt. Vernon and poured beer for a friend of mine at the Skagit Wine & Beer Festival; it was really an awesome experience and I was busy from sunrise to midnight. Sunday I barely had a cuppa j...

7. Torque (τ) = Force (F) * 2 * Radius (r) This is where I got lost. I'm very new to e-biking, but didn't think classical mechanics had changed that much. :) Interesting thread nonetheless. You are correct! A transposition error upon my part - thank you for catching that. :) It should read: 7. Torq...

Hi Richard - thank you for the tips! :D We've had a new development from the PNW Ghetto Grunge Garage … Snagged the Home Despot 1000 Lumen flashlights, QTY-2; the 1500 Lumen units would not fit in my backpack. No worries – the 1k are P L E N T Y bright by a factor of 3X each. 8) I disassembled one u...

Yes, the Cree flashlights have drivers built in. I have searched for candidates though fear that I am not well-adept in this field. Thus I ask for a lil’ help or boot up my backside in the general direction. My local Electronics supply carries NTE components; spendy but then it's same-day service. O...

Bravo KF, not a single substantive argument, though you did manage to demonstrate your lack of understanding of what generates heat in our motors. I challenge you to find the one slightly incorrect statement in my previous post, though the difference it makes is insignificant. Don't bother trying t...

My Father-in-Law used to tell me: “There are two types of people in this world: Those that can count…” (with anticipation of a conclusion that never arrived) Moving the sub-conversation here to this thread where we do not disrupt a fruitful conversation on the MXUS thread that has apparently moved o...

Got this bad boy a couple days ago and I finally had the time to hook it up this afternoon. DC-DC LM2596 Step-down Adjustable Power Supply Module _1.jpg Made the mods to my system where I could plug and play... The original circuit for the Crees was rock steady at 3.3VDC. The 12-volt feed into this ...

John , you have fallen on your sword and missed this by a wide frippen mile. I can't believe you actually posted the equation P = I^2R :lol: I love that Astro reference! Keep hittin' the Kool-Aid if it makes you feel good. It's pointless for me to continue questioning you when you have done yoursel...

Punx0r wrote:Astroflight say it's so and that's good enough for me

~KF

John , I struggle to believe the stuff you write. You have mixed metaphors and facts and your explanations do not add up. Forget trying to explain this myth business … you are not conveying a message that is believable. You appear to be unable to provide us with Math that proves your theory, yet yo...

KF, Your math is flawed. I think maybe the different way I just explained it in a pm may help. Sorry – I was busy Sunday and I’m just now seeing this. “The same speed pushing the same load up the same hill requires a fixed amount of power. “ Presume same manufacturer & motor series. All motors = Al...

Umm, I think there is some confusion here… :roll: I never said low-winds on small wheels will perform identical to high-winds on large wheels. What I said was -> You can take a high-wind motor and place it on a larger diameter tire to increase Kv and decrease Kt, and vice versa on lower-wind motors....

Defining Speed – using mathematics If we know the Power (P) and the Tire Size (given C, r, or d), theoretically we can calculate Speed (Linear Velocity, mph, kph). Mechanical Power (P) (kW) = (τ (Nm) * 2π * rpm)/60000 ω = 2π * Revolutions per second (rps) τ = Force (F) * 2r Electrical Power (P) = C...