Search found 422 matches

by oldpiper
Sep 20, 2013 3:55 pm
Forum: E-Bike Technical
Topic: Doc, you still looking for good 8-gauge wire?
Replies: 0
Views: 169

Doc, you still looking for good 8-gauge wire?

I haven't been around for a while (that's what a job'll do to you), but the last time I was, Doctorbass was looking for some 8-gauge silicone-covered wire (the good flexible stuff). Well, I don't know if he's still here (couldn't find his footprints in a quick perusal of the forums), but if he and/o...
by oldpiper
Jun 20, 2013 8:26 am
Forum: General Discussion
Topic: What will The Future look like?
Replies: 54
Views: 5844

Re: What will The Future look like?

Once software learns how to program itself, it will evolve, and evolve in much less time than the eons it took us. The future isn't predictable after that point. Some people expect it in 20 years. I expect it within 15 years. It's a project like http://www.humanbrainproject.eu/ that will probably l...
by oldpiper
May 30, 2013 1:06 pm
Forum: E-Bike Technical
Topic: dx.com cree bike light max voltage ?
Replies: 24
Views: 1711

Re: dx.com cree bike light max voltage ?

Well, the important spec on the LED (Cree XM-L T6) is that it will take 3A maximum http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Modules/XLamp/Data%20and%20Binning/XLampXML.pdf . There are a few really cheap ( < $5 ) adjustable voltage output DC-DC converters on DX.com which say th...
by oldpiper
May 24, 2013 1:26 pm
Forum: General Discussion
Topic: CO2 400ppm
Replies: 99
Views: 11224

Re: CO2 400ppm

dnmun, did you actually read what I wrote? " unless [word enlarged to be noticed here] we want to revert to an unindustrialized lifestyle (I need my air conditioning!), we need to be maximizing efficiency in the way we harness and use energy, not just maximizing short-term profit, or find a way to m...
by oldpiper
May 24, 2013 8:33 am
Forum: General Discussion
Topic: CO2 400ppm
Replies: 99
Views: 11224

Re: CO2 400ppm

Yes, there is controversy, even among scientists about whether (1) we are undergoing global warming (GW) or not, and (2) if so, we are a contributor to it. Fine, let those who want to argue, argue. But there seems to be general agreement that GW probably will screw up our environment (particularly a...
by oldpiper
May 23, 2013 8:50 am
Forum: General Discussion
Topic: Two 100 hour tests confirm heat production of e-cat
Replies: 24
Views: 1285

Re: Two 100 hour tests confirm heat production of e-cat

Sorry, Dauntless, I read "Doomsday" and my mind slips quickly to one day Apocalypses (Apocalypsi?), Bruce Willis, What's-his-name Goldberg, Mel Gibson, the physicists at CERN creating the earth-swallowing black hole, and possibly the most devastating disaster of all, Teletubbies. The only thing I co...
by oldpiper
May 22, 2013 9:20 am
Forum: Battery Technology
Topic: Viable 10,000 cycle, 1000C supercapacitor? 18yr girl has it
Replies: 11
Views: 1100

Re: Viable 10,000 cycle, 1000C supercapacitor? 18yr girl has

velias wrote:Its bullshit. It wont scale up.
It lit an LED--wow.
Sounds like she had an 'advisor' at a university.
Well maybe theres a reason why HE didnt publish his findings for himself.
Well, maybe it's in press somewhere, do you know it's not?

Cameron
by oldpiper
May 22, 2013 9:08 am
Forum: General Discussion
Topic: Two 100 hour tests confirm heat production of e-cat
Replies: 24
Views: 1285

Re: Two 100 hour tests confirm heat production of e-cat

I originally put this in Dauntless' thread he refers to in the Alternate Energy forum, but am moving it up here because I think it will get read by more of us: Re: Fire Ice, Your CleanBurningDoomsayAbundantEnergyoftheFuture (concerning methane hydrate on the seafloor) Methane hydrate (methane clathr...
by oldpiper
May 21, 2013 7:52 am
Forum: General Discussion
Topic: New thermoelectric cooler invention hits the market.
Replies: 8
Views: 1296

Re: New thermoelectric cooler invention hits the market.

Thanks, Leslie,

I might be able to use this (although not in my electric bike), much better than a plain old Peltier, as you say. Only wish I could get it bigger, like a cm^2 or two.

Cameron
by oldpiper
May 21, 2013 7:48 am
Forum: General Discussion
Topic: Two 100 hour tests confirm heat production of e-cat
Replies: 24
Views: 1285

Re: Two 100 hour tests confirm heat production of e-cat

'
Oh, ye of little faith,it HAS to be True! After all, they won't let just anybody write a blog on the Internet, of all places!

Cameron
by oldpiper
May 09, 2013 11:06 am
Forum: E-Vehicles General Discussion
Topic: Electric bike extra speed (battery)
Replies: 17
Views: 11316

Re: Electric bike extra speed (battery)

Just make sure you don't do both "for good measure" - connect the pos terminal of the new battery to the neg terminal of the existing chain and the neg of the new battery to the pos of the existing chain, or else that bike is going to go vertical (while the batteries go vertical, horizontal, and eve...
by oldpiper
May 09, 2013 11:00 am
Forum: E-Vehicles General Discussion
Topic: Anyone else accidently/stupidly shorting their connectors?
Replies: 41
Views: 3519

Re: Anyone else accidently/stupidly shorting their connector

bowlofsalad, if you want the flexible stranded wire, hit the hobby shops which sell RC stuff, they should have at least red and black in 14, 12, and 10 gauge. It's the same stuff you can get from at least one online supplier (I got a couple of meters red and black on eBay at auction for about 1/2 th...
by oldpiper
May 02, 2013 3:40 pm
Forum: General Discussion
Topic: DIY cheap fly/mosquito trap
Replies: 9
Views: 2709

Re: DIY cheap fly/mosquito trap

Actually the best bait should be a sweaty rag and a little CO2 generator. There is something in human sweat that attracts mosquitoes by itself, but no one has yet found out what (sweat is really a pretty complicated liquid) - no, it's not salt. A couple of years ago, the Rockefeller Foundation (I th...
by oldpiper
Apr 18, 2013 2:19 pm
Forum: General Discussion
Topic: Fertilizer Explosion
Replies: 11
Views: 1029

Re: Fertilizer Explosion

The biggest possible problem I see there (but this is all speculation, I have not seen a map of the plant) was that apparently a source of nitrate (may not even be ammonium nitrate, potassium nitrate is also used as a fertilizer) was close to the anhydrous ammonia storage tank(s) (IIRC, the media sa...
by oldpiper
Apr 18, 2013 2:19 pm
Forum: General Discussion
Topic: Your Job/Occupation/Career?
Replies: 93
Views: 5887

Re: Your Job/Occupation/Career?

I am an analytical chemist by training (Ph.D., 1980, U.Ga.) and trade. After working with "energetic materials" in a USAF lab, I taught at the college level for 26 years. Got burned out with that (the students seemed to come in less prepared every single year - I really would get depressed when I ca...
by oldpiper
Mar 07, 2013 8:37 am
Forum: Battery Technology
Topic: A123 vs. Turnigy (LiPo) vs. Zippy (LiFePo4) vs. you name it
Replies: 53
Views: 5183

Re: A123 vs. Turnigy (LiPo) vs. Zippy (LiFePo4) vs. you name

hillyterrain, I did not want to imply that SPC only sells locally, they are out there on the internet. My experience is just that they have quality batteries at good prices. BTW, I have no financial interest in this firm, I'm just a satisfied customer.

Cameron
by oldpiper
Mar 07, 2013 8:32 am
Forum: Battery Technology
Topic: Paralleling different capacity cells
Replies: 22
Views: 895

Re: Paralleling different capacity cells

The original poster was specifically talking about a pack which had cells which were "worn out, some more than others." In this case, you aren't talking about a good situation, just adding a good 5Ah battery in parallel with a good 2Ah battery to get 7Ah, but cells which supposedly started out the s...
by oldpiper
Mar 07, 2013 1:40 am
Forum: Battery Technology
Topic: Paralleling different capacity cells
Replies: 22
Views: 895

Re: Paralleling different capacity cells

It may work occasionally in a real pinch, but it is not a good idea if it can be avoided. Unfortunately, the strong cells don't effectively pull up the weak ones, but the weak ones quickly pull down the strong ones (that's why on alkaline flashlight batteries there is a warning not to mix them with ...
by oldpiper
Mar 06, 2013 4:46 pm
Forum: Battery Technology
Topic: A123 vs. Turnigy (LiPo) vs. Zippy (LiFePo4) vs. you name it
Replies: 53
Views: 5183

Re: A123 vs. Turnigy (LiPo) vs. Zippy (LiFePo4) vs. you name

hillyterrain, I don't know where you are, but I moved to Pittsburgh a year ago and it's pretty hilly here. If you want to go the RC-Lipo route (like Turnigy and Zippy), there's a good supplier up the road towards Erie, PA, Spec Point Concepts (www.spcracing.com). He (Tom) has good product and sells ...
by oldpiper
Mar 13, 2012 3:23 pm
Forum: E-Bike General Discussion
Topic: No 100% electric bikes?
Replies: 21
Views: 1065

Re: No 100% electric bikes?

AND (sometimes most importantly) to fool the Lycras into thinking that you are *really in shape* as you pass them by, going uphill, pedaling almost effortlessly.

Cameron
by oldpiper
Feb 24, 2012 9:58 am
Forum: Battery Technology
Topic: Dow-Kokam (NMC) vs. A123 (LiFePo4) comparative analysis...
Replies: 113
Views: 10857

Re: Dow-Kokam (NMC) vs. A123 (LiFePo4) comparative analysis.

Brass - I remember someone using a brass bolt in a high current load and it failing prematurely. It was completely corroded and everything else was perfectly fine. Made me nervous about using brass for my connections. Haven't been following this thread closely, but I'll put in my 2c about brass. Fo...
by oldpiper
Feb 23, 2012 8:59 am
Forum: E-Vehicles General Discussion
Topic: We need to make a million ebikes here in the USA !!!!
Replies: 20
Views: 1310

Re: We need to make a million ebikes here in the USA !!!!

OK, I will go on record saying that when I win the lottery, I will use that to do whatever I can to help the cause of producing AFFORDABLE, QUALITY e-transportation vehicles in the USA. Until then, I still have to work full-time at my day job. Notice, I didn't say that I'd start an ebike factory, a...
by oldpiper
Feb 22, 2012 11:14 am
Forum: E-Vehicles General Discussion
Topic: We need to make a million ebikes here in the USA !!!!
Replies: 20
Views: 1310

Re: We need to make a million ebikes here in the USA !!!!

OK, I will go on record saying that when I win the lottery, I will use that to do whatever I can to help the cause of producing AFFORDABLE, QUALITY e-transportation vehicles in the USA. Until then, I still have to work full-time at my day job. Notice, I didn't say that I'd start an ebike factory, at...
by oldpiper
Feb 21, 2012 11:03 am
Forum: E-Bike Non-hub Motor Drives
Topic: Newby advice
Replies: 8
Views: 1862

Re: Newby advice

Thanks for the replies. It's 15 miles each way, including a rather large two mile hill. Shame it'd need a controller, I want to keep the bike looking as bike like as possible - motor in a similar position to a water bottle, batteries in a back pack and a subtle drive line with minimal reduction gea...
by oldpiper
Feb 21, 2012 10:28 am
Forum: E-Bike Non-hub Motor Drives
Topic: The E-Vox, A new ebike desing with belt for people 50+
Replies: 31
Views: 3094

Re: The E-Vox, A new ebike desing with belt for people 50+

Looks pretty good, but the press release doesn't really say it's just for "50+" (if it were, I would take major offense), but also for Yuppies, in other words, a commuter bike. That works for me (except for snow and/or black ice). It's got "lithium" batteries, I'd guess LiFePO4 for use by the genera...