Search found 120 matches

by adriftatsea
Dec 02 2016 7:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1310
Views: 142784

Re: Dave's 80:1 RC mid drive kit build log

Any feedback on this new gearbox from SRI, the 'archimedes drive': https://www.youtube.com/watch?v=zoaHeamUqBE Think this is any easier to manufacture (the one using ball bearings demo'd in the clear acrylic) or hold up to ebike abuse? Anyway, my kit has seen near-daily use for over a year without m...
by adriftatsea
Dec 02 2016 6:08pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4352
Views: 598753

Re: Cycle Analyst V3 preview and first beta release

A few more questions: - I need to extend the 'speedo sensor'. Is this a normal pair of wires or is it shielded? - In the 'battery config' screen, can I set a battery >99.0ah? Can I get an accurate battery icon without this matching my pack (120ah)? Maybe in a future release? thanks for the help thus...
by adriftatsea
Sep 28 2016 12:52am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4352
Views: 598753

Re: Cycle Analyst V3 preview and first beta release

Problem: My CA3 takes a long time to shut down. I have it in a 72v (20s) vehicle with two Curtis 1238 controllers, who's caps I believe are feeding the CA3 when I shut the contactor off. Is there a suggested way to address this? I've thought about inline resistors and optionally breaking the 72v wir...
by adriftatsea
Sep 02 2016 11:55pm
Forum: Electric Watercraft
Topic: Have anyone tried using 4S Lipo on a 12V trolling motor?
Replies: 31
Views: 8847

Re: Have anyone tried using 4S Lipo on a 12V trolling motor?

I use a 24 V 80'-ish' lb Motorguide trolling motor with a Kelly 24 V brushed controller. ... As battery I use a 8S (24V) LiFePO4 70 Ah battery. But this could also be a regular series lead setup. I recently modified the trolling motor to be PWM controlled. What's a difference in battery does that m...
by adriftatsea
Aug 31 2016 7:10pm
Forum: Large EV General Discussion
Topic: Main Contactor powered by DC-DC Converter ?
Replies: 0
Views: 323

Main Contactor powered by DC-DC Converter ?

Hi. I'm building another 72V AC powered ATV/UTV thing using Nissan Leaf packs and would like to avoid using a 12V battery. Some setups I've seen use a DC-DC Converter with a switchable 'enable' wire (Sevcon's DC-DC, some Delta-Q chargers, etc) that will turn on the DC-DC converter when pack voltage ...
by adriftatsea
Aug 22 2016 1:40am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4352
Views: 598753

Re: Cycle Analyst V3 preview and first beta release

Is it possible to *input* information to the CA3 over serial? I have applications where additional information is needed and would really like to be able to have a custom field or ability to flash a text string to say the lower field of the LCD for X seconds.
by adriftatsea
Aug 07 2016 6:25am
Forum: E-Bike Non-hub Motor Drives
Topic: What does your bike weigh and what is your overall setup?
Replies: 20
Views: 2223

Re: What does your bike weigh and what is your overall setup

My Tangent driven bike is 47lbs with another 3.5lbs of batteries carried in my backpack (5ah 12s).
by adriftatsea
Jul 12 2016 11:11pm
Forum: E-Vehicles General Discussion
Topic: STIFF THROTTLE
Replies: 7
Views: 598

Re: STIFF THROTTLE

joecgz wrote: I'm a 75 years old
That is awesome. :shock:.
by adriftatsea
Jul 12 2016 2:29pm
Forum: E-Vehicles General Discussion
Topic: STIFF THROTTLE
Replies: 7
Views: 598

Re: STIFF THROTTLE

I found spraying lithium grease in my thumb throttle quite helpful. The resistance was more with the plastic being poorly manufactured (like most Chinese stuff) causing internal rubbing - rather than a super stiff spring.

My Magura twist throttle was buttery smooth right out of the box.
by adriftatsea
Jun 17 2016 5:43pm
Forum: Battery Technology
Topic: The Cycle Satiator, universal charger for the enthusiasts
Replies: 713
Views: 99996

Re: The Cycle Satiator, universal charger for the enthusiast

Justin, Are there plans to monitor cell voltage and provide cell balancing anywhere in the future? Maybe support CAN/i2c/whatever streams from other cell monitors? I trust the Satiator to not burn down my house when charging - but without a balancing option I'm still stuck with questionable means to...
by adriftatsea
Jun 09 2016 9:55am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid Drive Motors that mount ABOVE the Down Tube?
Replies: 3
Views: 710

Re: Mid Drive Motors that mount ABOVE the Down Tube?

Dave and a few others have mounted their Tangent kits within the Triangle. Seems to need a Horst link style aka VPP suspension frame where the pivot is behind the BB. http://i.imgur.com/cgWdK9C.jpg Motors on the swingarm seems to be the ideal solution, but not something you can do without a lot of f...
by adriftatsea
Jun 04 2016 9:15am
Forum: Items for Sale - Used
Topic: FS - [USA] GNG 60V Chain Driven Mid Drive Kit
Replies: 2
Views: 566

FS - [USA] GNG 60V Chain Driven Mid Drive Kit

Up for sale is my 60V, chain driven, GNG Mid Drive Kit. SOLD SOLD SOLD (retail price of $430) GNG kit official site: http://www.gngebike.com/60v650w-brushless In short, I took a spill at ~35mph and bent the stock, kinda crappy square end bottom bracket. Included however is a new ISIS splined Truvati...
by adriftatsea
May 31 2016 4:01am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 988
Views: 165729

Re: LMX P2 : Freeride trials motorcycle frame development

The prototype LMX is still one of the coolest looking ebikes to date. Love the progress and all the videos. Keep it up! 8) too bad those brakes are not manufactured any more! hope mono 6 ti with even bigger rotor up front 242 mm front. Also 6 piston. I based my latest build around Hope Mono6Ti 225mm...
by adriftatsea
May 25 2016 1:04pm
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1310
Views: 142784

Re: Dave's 80:1 RC mid drive kit build log

alaskaoneday wrote: Bullitt Cargo bike
...
first thing out of his mouth was, "YES!"
That is awesome.
by adriftatsea
May 14 2016 12:58am
Forum: Battery Technology
Topic: DIY spot-welder, FET-switched, processor-timed adj. pulse
Replies: 599
Views: 45322

Re: JP spot welder

Decided to jump in the tab welder game. Specs: 8x 0.11F (rated), 0.15F (measured), 15V ALEL caps => 120J 6x IRFP4004 MOSFETS, 40V, 1.35mΩ 6.35mm thick Al busbars Any more pictures, this looks rad. Did you mill the traces or use a photoresist? Any plans to sell kits/opensource? Voltage or discharge ...
by adriftatsea
May 06 2016 6:42pm
Forum: General Discussion
Topic: Me and Smurf made the news today
Replies: 7
Views: 538

Re: Me and Smurf made the news today

Rad trailer; awesome (and fluffy) dog.
by adriftatsea
May 02 2016 8:37am
Forum: E-Bike Non-hub Motor Drives
Topic: Descendence Astro 3220 mid drive build
Replies: 58
Views: 7436

Re: Descendence Astro 3220 mid drive build

I use a Busmann (Eaton) 187-series breaker. It's marine rated and can be had in up to 200amps @ 48v. Busmann is an industry leader and milspec supplier for this type of stuff. http://ecx.images-amazon.com/images/I/51gbqTImGHL._AC_UL320_SR238,320_.jpg http://www.cooperindustries.com/content/public/en...
by adriftatsea
Apr 20 2016 3:26pm
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1310
Views: 142784

Re: Dave's 80:1 RC mid drive kit build log

Another Hope user here (Pro II Evo) - no issues to date.

Also there's lots of talk about the noise of gearbox, but I think most people move out of my way on sidewalks and stuff because of the 'clack, clack, clack' of the hub as slow down :).
by adriftatsea
Apr 16 2016 3:23am
Forum: E-Bike General Discussion
Topic: V6 YASA motor !!!!
Replies: 18
Views: 2203

Re: V6 YASA motor !!!!

kasparsd wrote:I'm Kaspars from Drive eO and we're the company building the car. We'll be happy to answer any questions you might have about the car.
Props on the build thusfar. Can you share more about the reduction box?
by adriftatsea
Mar 31 2016 11:14pm
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1310
Views: 142784

Re: Dave's 80:1 RC mid drive kit build log

Damn Dave, that is sweet.
by adriftatsea
Feb 26 2016 10:19am
Forum: Stand-up E-scooters and E-skateboards
Topic: Aluminum extrusion subframe build- Prototyping Deck
Replies: 23
Views: 3101

Re: Aluminum extrusion subframe build

This is cool, but I worry this is unsafe. Not all extrusions are created equal. Some have a small taper to allow for preloading fasteners in high vibration applications - others are flat ... which when added to the normal deflection makes stuff wobble out. Also be sure to use the thicker, pre-instal...
by adriftatsea
Jan 16 2016 11:20pm
Forum: General Discussion
Topic: Help with number probability
Replies: 31
Views: 2036

Re: Help with number probability

Thanks Adrift, I see your edit. Will have to think on that, because I don't see how the first four digits is .01% chance? I don't grasp what it's judging the outcome against. A 9-sided die has 9 possible outcomes. Roll 4 die in a row and there are 6561 possible outcomes (9^4) or .01% you'll roll an...