Search found 194 matches

by ptd
Oct 09 2011 6:40pm
Forum: E-Bike General Discussion
Topic: Whos going to buy this thing??
Replies: 14
Views: 881

Re: Whos going to buy this thing??

the day the government wants your opinion, they'll send you an email, just so you know what it should be.
by ptd
Oct 08 2011 4:03pm
Forum: General Discussion
Topic: Steve Jobs, not Apple vs Micro$oft vs Google(Android)
Replies: 5
Views: 541

Re: Steve Jobs, not Apple vs Micro$oft vs Google(Android)

John in CR wrote:And? The guy is dead, and not coming back, so move on instead of treating him like your cult icon.
do we not think that jobs didn't take a look at cryo ? with $8.3 billion ? c'mon, you know he's frozen somewhere. when he's resurrected, he can roll out the iMBack.
by ptd
Oct 08 2011 3:51pm
Forum: Battery Technology
Topic: Battery usage statistics calculation
Replies: 7
Views: 856

Re: Battery usage statistics calculation

how about what amount of time was spent at what rate of discharge (AND charge, be it charger, or regen). small equalizer graph kinda thing. could be mined a lot of different ways. total wattage used. expected deterioration, and the resulting cycle life. an order of magnitude more accurate volt meter...
by ptd
Oct 08 2011 1:24pm
Forum: E-Bike Technical
Topic: Someone to fix a speed controller?
Replies: 4
Views: 494

Re: Someone to fix a speed controller?

hey, another noob here. that happens to have gotten his controller at cycle 9, that's not working worth a crap. you wouldn't happen to have a number you can actually reach them at, would ya ?
by ptd
Oct 08 2011 3:33am
Forum: Battery Technology
Topic: Making use of low C rate LiFePo4 cells
Replies: 31
Views: 2131

Re: Making use of low C rate LiFePo4 cells

ps, i'm not advocating lead, but it seems like the tech development would be in the BMS area, with the possibility of compartmentalizing the batteries, which might lead to a system where any chemistry, any size, could be plug and play. i think this might help with 1) being able to easily increase pa...
by ptd
Oct 08 2011 3:03am
Forum: Battery Technology
Topic: Making use of low C rate LiFePo4 cells
Replies: 31
Views: 2131

Re: Making use of low C rate LiFePo4 cells

didn't someone (was it, dare i say, safe?) do something like this with NiMh and NiCd? seems like it was something about preventing sag iirc. i know, different chemistry, but it seems like the principle might be the same. again, noob here, but can you hook a 48v20a and a 48v10a set of batteries in pa...
by ptd
Oct 06 2011 6:49am
Forum: General Discussion
Topic: Steve Jobs
Replies: 83
Views: 5300

Re: Steve Jobs

You've obviously not heard of IBM, radio shack, tandy, atari, amiga, commodore, Amstrad, Altair, TI, Sinclair, Acorn etc.. as for revolutionary change, most of the above systems started off offered to consumers as gaming platforms. funny you mention texas instruments. i was playing lunar lander and...
by ptd
Oct 05 2011 9:59pm
Forum: General Discussion
Topic: Steve Jobs
Replies: 83
Views: 5300

Re: Steve Jobs

neptronix wrote:You know... Apple didn't invent the personal computer.. right? :lol:
no, they didn't invent it, they were just the ones that got it into the hands of the masses.
by ptd
Oct 05 2011 9:05pm
Forum: General Discussion
Topic: Steve Jobs
Replies: 83
Views: 5300

Re: Steve Jobs

hmmm... a bunch of guys sitting around, dissing Jobs, while typing on their personal computers (which, imho, happens to be the greatest open development tool ever created). a bit hypocritical, methinks. i'd say he did just fine.
by ptd
Oct 04 2011 4:34pm
Forum: General Discussion
Topic: could use some electrical help here, thanks...
Replies: 18
Views: 2014

Re: could use some electrical help here, thanks...

hello, hello, hello... is there anybody out there... just type if you can hear me now...
by ptd
Oct 03 2011 1:36pm
Forum: E-Bike Technical
Topic: Rewinding motor...(updated) page 3 Auto Wheelie
Replies: 43
Views: 2929

Re: how does one rewind a motor well? how long does it take?

The number of turns is 100% irrelevant to the amount of torque a motor can produce. doesn't increasing the number of turns (by using smaller wire, but keeping the same fill %), result in the same power, just at a lower rpm? and wouldn't that be considered an increase in torque? #2 rewinding to add ...
by ptd
Oct 03 2011 5:45am
Forum: General Discussion
Topic: could use some electrical help here, thanks...
Replies: 18
Views: 2014

Re: could use some electrical help here, thanks...

If you can't get the motor to spin you will then need to check the halls and check the phase wires for shorts. ok, did all 36 combinations, and as expected, nothing. so how do i go about testing for shorts? and testing the throttle? and testing the controller? i get the feeling that it is the 'brid...
by ptd
Oct 03 2011 3:42am
Forum: General Discussion
Topic: How to steal a bike, maybe an e-bike, in the city.
Replies: 34
Views: 2810

Re: How to steal a bike, maybe an e-bike, in the city.

ok, hence, the delay. with a small chirp. enough time for you to stop, get off, and physically disable it. or maybe you just plug the remote in, like a key.
by ptd
Oct 03 2011 3:22am
Forum: General Discussion
Topic: How to steal a bike, maybe an e-bike, in the city.
Replies: 34
Views: 2810

Re: How to steal a bike, maybe an e-bike, in the city.

not enough delay. let him get on and up to about 10 mph, THEN taze him. and don't forget the video. or get really evil. put a transmitter on it, that sends a signal to your remote. then wait till he's in traffic. ps, i still like the seat taser idea. he'll hit the ground, and stay there. but maybe g...
by ptd
Oct 03 2011 12:36am
Forum: General Discussion
Topic: How to steal a bike, maybe an e-bike, in the city.
Replies: 34
Views: 2810

Re: How to steal a bike, maybe an e-bike, in the city.

i used to think the same thing. great idea. but the powers that be have already bungled it. there are now gps BLOCKERS, that any thief worth his salt will have. and iirc, they're cheaper, like $20. i say, keep up with the active deterrents. at the very least, it should make for a more entertaining y...
by ptd
Oct 03 2011 12:29am
Forum: E-Scooter and Motorcycle General Discussion
Topic: lit motors c-1
Replies: 116
Views: 6630

Re: Lit motors C1... gyro, enclosed, electric 2 wheeler

the gyro on the bus has no stabilizing affect. it's merely a flywheel, being used, as an energy storage device. Wrong. Every rotating mass has gyro-effect. i never said it didn't have an effect, i just said that it wasn't utilised for stabilization. and, iirc, it was attributed to causing difficult...
by ptd
Oct 02 2011 10:52am
Forum: E-Scooter and Motorcycle General Discussion
Topic: lit motors c-1
Replies: 116
Views: 6630

Re: Lit motors C1... gyro, enclosed, electric 2 wheeler

Guys, have you thought, that there could be a vehicle _powered_ by same gyro that stabilizes it? Just like gyro-bus the gyro on the bus has no stabilizing affect. it's merely a flywheel, being used, as an energy storage device. yes, we're talking about using the gyro's for dual duty. but i still se...
by ptd
Oct 01 2011 8:07pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: lit motors c-1
Replies: 116
Views: 6630

Re: Lit motors C1... gyro, enclosed, electric 2 wheeler

Assume the flywheel system weighs 100 lbs and put out 150hp in short bursts. The motor weighs 3 pounds and can put out 13 hp continuous. We could probably make our 0-60 goal if the total vehicle weighed in around 550 pounds. The idea is to use the flywheels for takeoff and then spool them up when b...
by ptd
Oct 01 2011 4:39am
Forum: E-Scooter and Motorcycle General Discussion
Topic: lit motors c-1
Replies: 116
Views: 6630

Re: Lit motors C1... gyro, enclosed, electric 2 wheeler

Would you all buy one if it went 0 to 60 mph in 2 seconds but only went 70mph tops on a long hill or flat with two riders ? if this were the case, i would rethink the gearing. my guesses at 70 mph up a 6% grade, 800 lbs GVWR, about 15 hp. 70 mph, at 1000 GVWR, about 7 hp. 0-60 in 2 seconds, about 2...
by ptd
Sep 30 2011 10:59am
Forum: General Discussion
Topic: could use some electrical help here, thanks...
Replies: 18
Views: 2014

Re: could use some electrical help here, thanks...

Put the black lead on the positive main power pin of the controller, and the red lead on the postive main power pin of the battery output. Connect the negative main power leads of the controller and battery together (if you only have one multipin connector and not somethign like andersons or bullet...
by ptd
Sep 29 2011 3:44am
Forum: Electric Aircraft
Topic: LOW COST UNMANNED SOLAR AIRCRAFT. We did it!!!!!
Replies: 16
Views: 3856

Re: LOW COST UNMANNED SOLAR AIRCRAFT. We did it!!!!!

grindz145 wrote:has nothing to do with ebikes
maybe that's why it's in the AIRCRAFT section
by ptd
Sep 28 2011 8:31am
Forum: General Discussion
Topic: How to steal a bike, maybe an e-bike, in the city.
Replies: 34
Views: 2810

Re: How to steal a bike, maybe an e-bike, in the city.

how bout a blue tooth signature ring. whatever it is doesn't power up unless it recieving a signal. could use it on a lot more than you bike. your car, your house, your laptop, your seat taser. give that a couple second delay though, so you have enough time to realize the throttle ain't working, and...
by ptd
Sep 26 2011 1:54pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: lit motors c-1
Replies: 116
Views: 6630

Re: Lit motors C1... gyro, enclosed, electric 2 wheeler

Hey PTD, I'm not a gyroscope expert by any means, but I don't see what the forces in the other two planes are. i'm not a physicist either. maybe 'forces' isn't quite the right term. i guess what i'm thinking is that there's rotational energy. doubly so, with the second counter rotator, and i'm thin...
by ptd
Sep 26 2011 2:17am
Forum: E-Bike General Discussion
Topic: need some help for an arm-powered offroad recumbent
Replies: 40
Views: 3592

Re: need some help for an arm-powered offroad recumbent

@ptd, thanks. I'm learning about this technology as we speak. A few weeks ago I didn't quite understand pedalec. A push-button throttle on the "pedal" is an okay idea, though some riders this bike is tailored for (myself included) have spinal cord damage that results in limited hand function. I'm s...
by ptd
Sep 25 2011 7:29am
Forum: E-Bike General Discussion
Topic: need some help for an arm-powered offroad recumbent
Replies: 40
Views: 3592

Re: need some help for an arm-powered offroad recumbent

anyone care to venture a guess as to what ungodly sum of cash they'll charge for this thing ? you might keep in mind that they appear to be a retailer for bionx. and charge $835 for a 48v10ah lifepo4 and charger. my guess is that they'll try to secure disability funding somehow, and ask about $8,000...