Search found 79 matches

by Reflector
Apr 10 2021 10:44pm
Forum: EBike General Discussion
Topic: Bafang BBS02 gearing for 20" wheel
Replies: 3
Views: 304

Re: Bafang BBS02 gearing for 20" wheel

Thanks for the response Chalo. The rx-rk5 looks like a viable and relatively (compared to Rohloff et al.) inexpensive option. Maybe a Sturmey Archer S2 inline could give an additional 38% gain? The chain case is to cover the only exposed area of chain from the rear axle to half way along the swing a...
by Reflector
Apr 09 2021 6:34pm
Forum: EBike General Discussion
Topic: Bafang BBS02 gearing for 20" wheel
Replies: 3
Views: 304

Re: Bafang BBS02 gearing for 20" wheel

Plenty of lookers...but no feedback from anyone?
by Reflector
Apr 06 2021 10:25pm
Forum: EBike General Discussion
Topic: Bafang BBS02 gearing for 20" wheel
Replies: 3
Views: 304

Bafang BBS02 gearing for 20" wheel

I want to reduce my 24 gears and also dispense with the rear derailleur and to fit a modified Hebie chain glide to the rear wheel of my Alleweder A4 velomobile. My currently installed setup is; Bafang BBS02 500W, 42T Lekkie, SRAM DualDrive 8 spd cassette (11 - 30), 20" wheels. After much compar...
by Reflector
Jan 18 2021 6:39am
Forum: EBike Technical
Topic: Turn signals shared between 2 batteries
Replies: 8
Views: 225

Re: Turn signals shared between 2 batteries

I've got German LED velomobile indicators installed which ran okay via the Zippy hard pack 5,000mAh LiPo. If I use the diodes I have on hand it looks like I'd need one pair (in 'Y' formation) per indicator. Now I've realised that I'd also have to run separate wiring to the indicators from each batte...
by Reflector
Jan 17 2021 3:29am
Forum: EBike Technical
Topic: Turn signals shared between 2 batteries
Replies: 8
Views: 225

Re: Turn signals shared between 2 batteries

Oh, ok guys now I think I understand. The diode has 2 inputs (from alarm and from 12V bus) and the output goes to the +ve of the LED indicator. Then repeat the procedure for the remaining 3 indicators. Have I got it?
by Reflector
Jan 17 2021 3:15am
Forum: EBike Technical
Topic: Turn signals shared between 2 batteries
Replies: 8
Views: 225

Re: Turn signals shared between 2 batteries

I have some 1N4004 on hand, would they do the job?
If so, where would they go in my rough flow chart?
by Reflector
Jan 16 2021 7:39pm
Forum: EBike Technical
Topic: Turn signals shared between 2 batteries
Replies: 8
Views: 225

Turn signals shared between 2 batteries

I want to share my turn signals between the batteries of; 1) an alarm system 2) my 12V velomobile supply (lights, horn, fan and turn signals) When my (48) motor supply is turned off, there is no feed to the 48V / 12V buck converter which then feeds the supply (in #2 above). To share the signals betw...
by Reflector
Sep 22 2020 9:01am
Forum: EBike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 167
Views: 43388

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

I don't know anything about the Grintech PAS unit, but on the BBSHD, the grey and white wires are both pedal RPM sensors that are in quadrature so the MCU knows the pedal direction. All sorted. I discovered a discrepancy between the pin out diagrams of the PAS JST connectors for the BBS02 diagram a...
by Reflector
Sep 17 2020 11:52pm
Forum: EBike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 167
Views: 43388

Re: DIY Fix for BBS02 Pedal/Throttle Issue

The circuit diagram looks like this: Darlington Circuit.jpg I used the above circuit with an MPSA13 and a 100k resistor, but due to the mechanical obstructions (chains, tensioners etc.) and wiring already fitted, I decided to take a slightly different tack. I have a Grintech 24P external PAS sensor...
by Reflector
Aug 12 2020 7:31am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Here is the hardware fix: https://endless-sphere.com/forums/viewtopic.php?f=28&t=93977 this will give the throttle priority over the PAS. As soon as you hit the throttle, the PAS is disabled and the throttle behaves like a throttle is supposed to. Brilliant! Just what I was looking for. Throttl...
by Reflector
Aug 11 2020 3:46am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

If the pedals were moving even though you weren't pushing on them, it could make it stay on. Pedaling backward should make it stop immediately. I suppose it's possible there is a short in the main cable harness that goes from the throttle to the controller. First Prize goes to Fechter! These be my ...
by Reflector
Aug 10 2020 12:49am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Looking forward to your build log. Here's a picture to go on with (oh how I love the beauty of CNC'd alloy). The swing arm has two enclosed suspension springs (see top left of picture). Also a braced aperture for the U lock to go through. swingarm.JPG Are your different voltage supply grounds kept ...
by Reflector
Aug 09 2020 11:58pm
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Yes, but I did think of perhaps an easier test... What happens when you pull the plug of the throttle connector when it sticks in high? Just disconnected the thumb throttle connection while WOT...motor kept churning away. I'm dreading the fact that it is a controller issue; but everything seems to ...
by Reflector
Aug 09 2020 9:15pm
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Try using the throttle without pedaling at all and see if it behaves smoothly. This will tell you if it's just the crappy Bafang software issue. Hi Fechter, I'm managing the throttle testing without pedalling. The velomobile is on ramps (front wheels) and rollers (rear wheel) while I crouch beside ...
by Reflector
Aug 09 2020 5:02am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

I'll try disconnecting the thumb throttle when it goes WOT. I hadn't thought of that. Van's RV-7 yep, that's the one. I used Everbrite 'Protecta clear' to try and maintain the finish (just for safety's sake :wink: ) I have no idea what they use for their mirror finish. The semi-monocoque body on my ...
by Reflector
Aug 08 2020 8:15pm
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Thanks for your advice TC.
So I need to read across the blue throttle sensor cable and ground (at the controller) as the thumb throttle was moving through its' range?
Ah, the propellor...
This is what I wanted
What I wanted.jpg
What I wanted.jpg (88.47 KiB) Viewed 350 times
This is what I made
What I made.JPG
What I made.JPG (427.14 KiB) Viewed 350 times
by Reflector
Aug 08 2020 8:18am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

The motor, although bought new in 2014 has less than 50km on it (all under cover of the velomobile shell and never in the rain) so there is not a water problem. I get 4.94V on the 5V power from the controller to the throttle. The throttle is either ON or OFF, no gradual increase at all which doesn't...
by Reflector
Jul 26 2020 7:13am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Of course whilst your in there, verify that the magnet(s) and hall sensor are in there correct positions. Then bench test again with your own 5vdc (or close) voltage supply. Looking for that glorious ~1 to ~4vdc linear output. :oops: Sorry guys, I rediscovered a diagram which showed the throttle pi...
by Reflector
Jul 26 2020 2:49am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Thanks Amberwolf What would cause a thumb throttle to exhibit 4V over its' full range? Miswiring can do that, including damage to the hall sensor from a wiring problem. Broken ground could do that. Sometimes a magnet broken off inside and stuck in the wrong place can do that. 4.83V (Red) and 4.93V (...
by Reflector
Jul 26 2020 1:05am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Re: Throttle Voltage Query

Hi Reflector, I would be very suspicious of your actual hall throttle wiring, And recommend opening it up, and verifying the correct wires to sensor pin-outs (5vdc,0vdc, and Output)as seen below... https://i.imgur.com/FxWvw5r.jpg sensor wiring verified.jpg As per the diagram above. NOTE: The wire C...
by Reflector
Jul 25 2020 6:57am
Forum: EBike Technical
Topic: Throttle Voltage Query
Replies: 22
Views: 884

Throttle Voltage Query

What would cause a thumb throttle to exhibit 4V over its' full range? I have two which I've tried and they both present a similar result (one with 4.32V one with 4.54V). I've made a 'break out' cable so that I can test each throttle in situ with the Bafang powered up. Using this cable I've recorded ...
by Reflector
May 30 2020 8:30am
Forum: EBike Technical
Topic: Thumb throttle won't stop when released
Replies: 8
Views: 460

Re: Thumb throttle won't stop when released

Not the sort of unexpected 'cruise control' I care for :shock: I had already flashed the software. Afterthought; The BBS02 installed in my velomobile has the speedo sensor mounted at one of the front wheels. While testing throttle operation with the rear wheel on a roller (bricks as chocks in front ...
by Reflector
May 08 2020 2:52am
Forum: EBike Technical
Topic: Thumb throttle won't stop when released
Replies: 8
Views: 460

Re: Thumb throttle won't stop when released

That's pretty bizarre. Never heard of that symptom before with a BBS02. When you stop it with the brake lever switch, does it start going again when you release the brake? No, when the brake lever switch is activated the motor stops. However when the 'Big Green Button' is pressed and released, the ...
by Reflector
May 07 2020 2:26am
Forum: EBike Technical
Topic: Thumb throttle won't stop when released
Replies: 8
Views: 460

Re: Thumb throttle won't stop when released

Thanks guys for your input; I found the original (unused) Bafang thumb throttle and tried that with the same result.
I've had a look at Tommy Cat's throttle guide and see that it is very in depth indeed and I'll dig deeper.
by Reflector
May 06 2020 7:42pm
Forum: E-Vehicles General Discussion
Topic: The BEST connectors, period
Replies: 55
Views: 11054

Re: The BEST connectors, period

Yes I've had no problem with the Sub D connectors that I used for connections to the 12V control centre in my velomobile build. I also used the 3.5mm banana plugs, mini JST and of course the joins which enabled man to get to the Moon. Splice wires to NASA Standards https://www.youtube.com/watch?v=O-...