Packcycle 2.5 (watercooling mods in progress)

[lazarus2405]

This thread needs pictures.

[Link]

This thread needs pictures.

Rawr! Don't remind me. I'd like to post pics of the motor and connectors, but I can't afford a camera now! I got like $420 of loan to pay off (interest free, woo).

I could use my g-ma's cell phone, but it doesn't have an SD card or a cable to connect up to it.

They are having a sale on cameras at Target, though. Almost half-off on all of them. Mebbe get a cheap one from there...


Hmm, checked my accounts. I can swing maybe a $100 camera. I'll check tomorrow and see if they're still on sale. If they are, I'll get one. If not, I find a cable for the cell phone.

Recommendations, anyone?

[TylerDurden]

http://www.target.com/Nikon-Coolpix-Com ... 52-5877459


$140, but a lotta bang/buck and Nikon glass.

[lawsonuw]

My recommendation on digital cameras is to get a refurbished older model camera. (I did that and I'm quite happy with my camera) My other recommendation is get an old Fujifilm FD-30, it has better than average performance in low light, and is quite cheap now.

Marty

P.S. http://www.dpreview.com/ has LOTS of info on what to buy and what not to buy.

[kbarrett]

Get a two year or older refurbished.

Two year old top of the line tech for pennies.

http://www.refurbdepot.com/productdetai ... ct_ID=4031

[Dee Jay]

I was waiting for pics too.

Get a USB webcam and a long-ass USB cable. Look for it in garage sales or flea markets and you might get it for just a few bucks.

J

[lazarus2405]

Get a USB webcam and a long-ass USB cable.

I'd have to disagree. I have tried taking photos with my webcam (advertised 1.3MP still capability), and the results were awful. The worst bit is that most webcams can't focus; they're set to a specific focal length to save money, making anything closer than 3 feet unbearably blurry.

[TylerDurden]

If you consider used, the Canon A70 is nice: Computer controllable (for intervolometer) and macro to <2".

[Link]

http://www.target.com/Nikon-Coolpix-Compact-Digital-Camera/dp/B0011N180Q/qid=1210167159/ref=br_1_9/602-9882252-5877459

WTF that's the one I got !

Anyway! Pics!



The hub after I've had my (unwilling) way with it.




The 48V block of batteries with breaker, controller, and Doc Wattson attached. Soon to be 50% more voltage .




The battery side of the connector I made.




The bike side of the same connector, hidden under the seat. Should probably trim my nails...

*bites at them*




What I originally was going to use to take pics. $100 MP3 player sucked to begin with, though. Total waste of my money. And I lost the reciept before I got home !


I'll take pics of the whole bike tomorrow.

[Link]

Woo! 72V successful! Haven't ridden it yet, though. Pics and a spinup vid after bowling !

[lazarus2405]

Looking good!

What's the circuit breaker DC rated at, out of curiosity?

[Link]

Looking good!

What's the circuit breaker DC rated at, out of curiosity?

No idea. All I know is that it's rated to 240V AC, 50A trip, and up to 10,000A fault. The bit of wire inside it is 10ga. 72V should be no problem.

Anyway! Modding done! Moar pics!

What I started with. I ended up covering the entire table with boxes, tools, electronics, and batteries, LOL.



Stock controller innards (USB cable for throttle).



Pic of the schottkys. I could find no spec sheets, but I'm very sure they are rated for 20A and 100V based on the naming schemes of identical diodes.



Useless pic of board with caps, FETs, and diodes removed.



4110 FETS, 100V 470µF caps, and stock diodes. Modding done!



Battery block. Wiring was tricky (had to keep the 5Ah and 4.5Ah batts electrically separate, both for protection and charging), but it works excellently.



Controller connector. Puts the batteries in series and adds a 48V tap for the board logic.



Charging up.



And a bigger pic of the bike itself.


Speed tests due within the week.

EDIT: Vid is up.



Predicted speed based on performance in 26" wheel at 48V is just above 30mph.

[Drunkskunk]

Well, I finaly get to say it. Nice Bike, Link. Good clean build.

[Mathurin]

Yeah +1 to what Drunkskunk said, I expected a rat's nest.

[TylerDurden]

Nah, the batteryblock is ghetto enough to earn TWO 40s!

[Link]

Nah, the batteryblock is ghetto enough to earn TWO 40s!

LOL, sounds about right for a mounting/masking tape SLA pack with a breaker and controller on it wired with 13ga (equivalent) speaker wire.


But this is all anyone sees when I'm riding it.


Won't even be that much when I cut a hole near the bottom to thread the wire through.

[ngocthach1130]

They don't even need to see the back pack at all. They sell vest where you can stick lead weights for weight training. Replace those with your lead battery. Weight train while you're off the bike and put it to good use once you're on it.

[TylerDurden]

They don't even need to see the back pack at all. They sell vest where you can stick lead weights for weight training. Replace those with your lead battery. Weight train while you're off the bike and put it to good use once you're on it.

Just don't wear it into a bank or a courthouse.

[Eric G]

Very nice work there Link!

Eric

[Link]

Nooooooooo...

...

I think I killed my batts. Took a ride down to the ATM and back before work yesterday. Didn't think it would use that much energy. Gave it a while to charge up. Didn't get them all the way up before work, but they should have been close to full charge. I have a little spare capacity anyway.

What I failed to consider was that the second charger was NOT 1.5A like I thought it was. It was a 1A charger. Meaning that, while the other batts might have gotten close to a full charge, the 24V sub pack (e.g. the friggin' NEW batts ) did NOT. Full speed normally is 31.6mph (according to my cheap but accurate cycle computer). By the time I was three or four blocks from work, top speed started dropping. Big time. Down to like just below 20mph.

I had hoped they weren't screwed up TOO badly, but it looks like it. With 50% more battery, I should be able to get to get there with more to spare than the old pack, which didn't even start to sag quite as badly. Now, though, I have to start babying the throttle a mile from my house. It's a friggin' 2.3 mile ride .

*sigh*

As much as I want a lithium pack, I can't really afford it right now. Well, I can, but I don't want to HAVE to afford it. I had hoped this pack would last me another two weeks or so.


On the other hand, the motor performs beautifully. Only gets pleasantly warm on even hot days. 72V on a BD36? Acceptable.

[kbarrett]

SLA sag freaks another rider ....



( You might want to baby them by dumping voltage down to 48 or even 36V. At those speeds wind resistance is going to eat those SLAs like candy. )

[Link]

The 48V pack is the same used on the Schwinn S40, which did 27mph on 48V in a 26" rim. They didn't like it, but they held up. The 24V pack is of higher quality than that. They should've been fine, and they were fine the first time I rode it (the time before I screwed them up ).

BTW, the Kreuzotter is still down, and the Wayback machine doesn't have a copy . Anyone have a copy of it in their internet cache?

[Link]

Random update:

I have a whole 13 miles on the new odometer. It got reset by accident when it had 4 on it though, so I've really done about 17, LOL.

These batteries are killing me. I have to really be careful if I'm going farther than like 2 miles. The farthest I can go is about 3.5 if I keep my speed to 20mph max and accelerate very softly. I think I have only like 70 or so whrs available to me. It sucks. Can't wait for the 72V 5Ah pack. I'll have to remove half the shunt to keep the batteries happy, but I have plenty of acceleration, anyway. I was drag-racing a guy on a sportbike from stoplights. He does a double-take at me like, "WTF?". He got away from me in the end (full throttles it when my batteries are almost dead), but it was still priceless.

[dogman]

Love your posts link, a lot of my fuzzy thinking I like to blame on paint stripper. That stuff goes into your skin, and straight to the blood and makes the brain think its smarter while cells die. Near my house there is a dead goat lately. it's realy dead and stuff, and my dogs love to roll in it when it's good and juicy.

[Link]

Official water-resistance rating: very.

Took a ride in the rain today (had to get back home from the bowling alley, LULZ). It was raining pretty hard. I got soaked. I'm still kind of damp. Big raindrops start to hurt at around 30mph .

No problems with the bike. I had already waterproofed the hall sensor in the throttle with some hot glue. I was a little worried about the battery/bike connector, but it didn't have problems even when soaked, either. Motor ran cold, of course .