Search found 32 matches

by Eric
Oct 24 2012 1:06am
Forum: E-Bike Build Threads / Photos & Video
Topic: Catrike Expedition Touring Trike
Replies: 8
Views: 2317

Re: Catrike Expedition Touring Trike

Nice trike. I like the extra cargo space in back; was that accomplished with an Xtracycle Freeloader?
Eric
by Eric
Oct 27 2011 10:15pm
Forum: E-Bike General Discussion
Topic: Why did you get into electric bikes?
Replies: 58
Views: 5086

Re: Why did you get into electric bikes?

I tried a colleague's ebike while at my previous company. I was interested, but the 9 mile ride was short enough to make riding a standard bike justifiable. When the company closed down and my new job was 20 miles away, I had to find a way to speed up my riding. Now my commute is about 50min by car ...
by Eric
Oct 01 2011 1:38pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Iovaykind's Novara Method 1.0 Build
Replies: 69
Views: 6948

Re: Iovaykind's Novara Method 1.0 Build

You can find these in most decent hardware stores. As dnmun stated, add washers to spread out the force.
Eric
by Eric
Jun 12 2011 10:52pm
Forum: Battery Technology
Topic: Your experiences with headway headquarters - good? bad?
Replies: 5
Views: 936

Re: Your experiences with headway headquarters - good? bad?

I've had one experience. I arranged via a phone call to pick up some bus bars and plastic spacer blocks on my way home from work. The parts were set out and waiting for me when I arrived. Simple transaction. Seems like a small operation run by helpful folks.
Eric
by Eric
Apr 07 2011 8:06am
Forum: E-Bike General Discussion
Topic: Any recommendations about a durable tire/tube combination?
Replies: 25
Views: 2520

Re: Any recommendations about a durable tire/tube combinatio

The only thing that stopped all my flats are the super thick slime tubes. I've had bad luck with punctures on my 20 mile commute and these tubes have saved me from road side repairs at least 4 times. I have found the thinner slimes also work, but tend to be more puncture prone and do not re-seal as ...
by Eric
Apr 04 2011 10:28pm
Forum: E-Bike General Discussion
Topic: Pusher-Trailer: A Bicycle-Frame Solution
Replies: 87
Views: 29530

Re: Pusher-Trailer: A Bicycle-Frame Solution

Hello Kingfish, I have an Adams Trail-a-bike and used it with my youngest (probably 60Lbs at the time) for longer bike rides. The trailer's seat post mount stays clamped to the tube and allows easy removal of the trailer. HitchSideView.JPG There is a U joint on the trailer side of the mount to allow...
by Eric
Jun 09 2010 11:19pm
Forum: E-Bike General Discussion
Topic: What's Causing Excessive Current Draw?
Replies: 5
Views: 639

Re: What's Causing Excessive Current Draw?

Thank you, all, for your input. LFP, I wondered about the throttle, especially since I park my bike outside, uncovered during the day while I'm at work. This has been a very wet Spring. It would explain the 36A/motor shut off symptom, but not really Symptom 1 where cycling the controller switch redu...
by Eric
Jun 08 2010 7:20pm
Forum: E-Bike General Discussion
Topic: What's Causing Excessive Current Draw?
Replies: 5
Views: 639

What's Causing Excessive Current Draw?

I'm having intermittent problems with my system. Symptom 1: CycleAnalyst indicates high current (2-10A) when the controller is first turned on and the bike is stationary. Normal is <1A. Resetting the controller using its power switch drops the indicated current by about half upon each toggle of the ...
by Eric
Apr 27 2010 11:05pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Tidal Force S-750 Build by mikeross
Replies: 59
Views: 10066

Re: Tidal Force S-750 Build by mikeross

Mike, I don't want keep harping on fenders, but, as a fellow wet weather rider, thought I would share my experience. I used a front SKS like what you have and found it completely useless above 15MPH. The front tire picks up water from the road and throws it up and forward. Problem is, there's so muc...
by Eric
Mar 13 2010 9:14pm
Forum: Battery Technology
Topic: 16-20 Mi w/4-33amphr SLA 24V 500W motor? help!
Replies: 3
Views: 418

Re: 16-20 Mi w/4-33amphr SLA 24V 500W motor? help!

I think the real answer is "it depends". You should consider: How fast, how many hills, how much stop & go, how hard will you be peddling and how quickly do you want to accelerate. My usage is about 6-8Ah from a 48V A123 pack during my 20 mile commute to work. My total elevation change is about 300f...
by Eric
Feb 21 2010 3:18pm
Forum: Battery Technology
Topic: Switch mode supply mod
Replies: 653
Views: 92111

Re: Switch mode supply mod

[quote="mwkeefer"]...all my old units S-350 are stamped on the circuit board with 0-94v which could simply mean that individual possible range points are 0-94v each (don't try it).... You might want to double check the stamping on the PC Board. 94V-0 is a flammability rating that's stamped on most b...
by Eric
Jan 04 2010 7:44pm
Forum: Battery Technology
Topic: Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*
Replies: 236
Views: 41576

Re: Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*

LFP, I agree with Camlight's suggestions for circuit reconfiguration, although I think he understates the potential problems from switching the gates directly through those inductive, leaded resistors. I would bet it's not the switching frequency, but the edge rates (high harmonic content) and are l...
by Eric
Dec 21 2009 11:33pm
Forum: Battery Technology
Topic: What batteries are you using?
Replies: 8
Views: 1172

Re: What batteries are you using?

I'm using a 16S5P A123 pack assembled from 8 DeWalt tool packs. I purchased them from ebay tool pack sellers berchent & Your_Tool_Cage for $100 each about 10 months ago. I connected these to an ecitypower 45A BMS (~$45), and 75A discharge + 45A charge power poles. Total cost was about $900. The pack...
by Eric
Dec 17 2009 1:14am
Forum: E-Bike General Discussion
Topic: Stuck, and had to call for back-up?
Replies: 22
Views: 1873

Re: Stuck, and had to call for back-up?

Been there twice, both times due to flats. At about 200 total mileage, and 9miles from home, I ran over something metal with my back tire nearly locked up for a panic stop at a red light. Thought I could make it through the intersection while the light was still green. Not sure what the object was (...
by Eric
Dec 15 2009 10:29pm
Forum: Battery Technology
Topic: RealForce LiFePO4 packs (10ah 24-36v)
Replies: 8
Views: 2583

Re: RealForce LiFePO4 packs (10ah 24-36v)

His quotation states, "Twenty (20) units MOQ ." MOQ = Minimum Order Quantity; that's probably why you did not receive a response for a lower number.

Do you have any information about the C rate of these packs? They all look like 2C except the tool packs here. which are 10C.

Eric S.
by Eric
Dec 10 2009 10:48pm
Forum: E-Vehicles General Discussion
Topic: Nissan Leaf EV
Replies: 160
Views: 33739

Re: Nissan Leaf EV

I attended the Nissan Leaf Tour today in Bellevue, WA, USA. The car is not as tall as I expected and it looks a lot nicer in person than in photos. I only learned a couple of new points. The NEC/Nissan Alliance group is going to manufacture the battery packs in the US and has already signed an agree...
by Eric
Dec 06 2009 3:05pm
Forum: E-Bike Technical
Topic: How much of the time are ebikes run at full throttle?
Replies: 32
Views: 3123

Re: How much of the time are ebikes run at full throttle?

My throttle usage depends on my desired range. I ride a 5304 w/11.5Ah, 48V A123 pack. My CA is set for 30A which will get me about 27MPh without peddling. Even though my BMS limits at 40A, my CA records spikes over 50A. Commuting 20miles _to_ work is mostly downhill, I use full throttle for the firs...
by Eric
Nov 21 2009 3:17am
Forum: E-Bike Build Threads / Photos & Video
Topic: Beautiful Beast Electric
Replies: 23
Views: 5948

Re: Beautiful Beast Electric

Hello SB, I noticed your Old Man Mountain front rack on the Beast. How is that working out for you? Have you loaded it with much weight? How does the handling change with a heavy load in front? Would you recommend it to others? I've been considering a front mount for 48V, 10Ah with another 48V, 10Ah...
by Eric
Oct 10 2009 2:25pm
Forum: Battery Technology
Topic: BMS and charger from ecitypower
Replies: 9
Views: 1279

Re: BMS and charger from ecitypower

Sure thing. This was for their 16 series BMS. I hope it can help with the labels they used on your 100A version. Please keep the order below to install(It is very important to install in sequence!). 1. B- to battery pack- with a big copper wire. 2. C- to charger- with a big copper wire. 3. Cell1 neg...
by Eric
Oct 10 2009 11:08am
Forum: Battery Technology
Topic: BMS and charger from ecitypower
Replies: 9
Views: 1279

Re: BMS and charger from ecitypower

I purchased a 48V BMS from ecity and received no documentation with the shipment, but was emailed instructions and a connection diagram within a day of requesting one. Have you asked ecity to send instructions to you?
Eric
by Eric
Jul 30 2009 8:21am
Forum: Battery Technology
Topic: Reconfiguring a "standard" Headway pack
Replies: 12
Views: 1155

Re: Reconfiguring a "standard" Headway pack

I believe the answer to your question regarding balancing wire length is, as usual, "it depends". Looking at a real world example: 27 gauge balancing wires having resistance of 0.0043 ohms/inch. An A123 pack having a difference in balance wire length of 13 inches. A Fetcher/Goodrum BMS has a balance...
by Eric
Jun 19 2009 8:25am
Forum: Battery Technology
Topic: found new cheap site for BMS, LiFePO4 & charger up to 18000W
Replies: 270
Views: 41745

Re: found new cheap site for BMS, LiFePO4 & charger up to 18000W

I purchased the 45 amp model, BMS-16S-45AR, which is supposed to handle 45-75 Amps. Mine has 4 FET's and 3 shunt wires. It looks like you received the BMS-16S-20AR (20Amp) model. As for a hook-up diagram, look earlier in this thread for the diagram they sent me. It should apply to your BMS as well. ...
by Eric
May 21 2009 8:27pm
Forum: Resources & EV Related Parts and Services
Topic: Power calculator
Replies: 33
Views: 29667

Re: Power calculator

Am I the only one who cannot open this due to its password protection? It probably works fine in other spreadsheets, but Xcel is having issues.
Eric
by Eric
May 18 2009 7:27pm
Forum: Battery Technology
Topic: Price Discrepancy in Batteries
Replies: 3
Views: 648

Re: Price Discrepancy in Batteries

I think the difference is part of the description, "•Specially designed for Airsoft guns..."
Electrically, they look identical.
Eric
by Eric
May 18 2009 7:54am
Forum: E-Vehicles General Discussion
Topic: Ultimate Electric Solo Boat
Replies: 10
Views: 1292

Re: Ultimate Electric Solo Boat

Hey Bubba,
Check out http://godevil.com/ for a commercially available version of those motors. The videos nicely illustrate their capabilities.

Eric