Search found 167 matches

by zotdoc
Thu Oct 05, 2006 9:21 am
Forum: General Discussion
Topic: Capacitor powered car to give 500 miles on 5 min charge
Replies: 40
Views: 17152

safety

I think this whole idea is bogus due to the conservation of energy laws and the math already demonstrated in other posts, but safety keeps coming up, so I'm putting my 2 cents in. Gasoline has a flash point of -45 degrees F, and the fumes are explosive under certain conditions. If we can design a ca...
by zotdoc
Sun Sep 17, 2006 7:50 pm
Forum: General Discussion
Topic: I'm bored :-)
Replies: 17
Views: 8037

Why don't you make a computer controlled fountain, that would "dance" to music and have the leds shine into the spray and change colors, also synchronized to music? I have spent many happy, but unsucessful hours trying to electrically fire fireworks synchronised to a music show! A project ...
by zotdoc
Mon Sep 11, 2006 2:55 pm
Forum: General Discussion
Topic: NiMH batteries
Replies: 7
Views: 3709

NiMH batteries

Anyone out there with battery expertise have thoughts on making your own NiMH batteries? I'm talking about large units for EV propulsion. Is this totally impratical, dangerous etc. ? To power an EV, I understand that a battery pack would cost $30,000.00. I have a lot of space and a fairly sophistica...
by zotdoc
Fri Sep 01, 2006 7:12 pm
Forum: General Discussion
Topic: microcontroller - which to pick?
Replies: 3
Views: 2508

microcontroller - which to pick?

I am interested in learning about and using microcontrollers in my electronics hobby. I am sure that there is no one "best", of course, but since it will take considerable time and money to learn how to program and use each chip, I'd like some help on which chip to start with, Basic stamp,...
by zotdoc
Thu Aug 24, 2006 2:40 pm
Forum: General Discussion
Topic: ANOTHER electric car -- BUT ......
Replies: 24
Views: 11477

The neighborhood car may work for some people, But I would still need to get on a 60 MPH highway for about 15 miles each way, so it wouldn't work for me. I believe the electric car for now will remain a mission intensive vehicle, but if we all had em, especially with some type of solar charging sche...
by zotdoc
Thu Aug 24, 2006 7:04 am
Forum: General Discussion
Topic: ANOTHER electric car -- BUT ......
Replies: 24
Views: 11477

That was a great site, and I'm sure the car will be a hit. I wish someone would make a practical electric pick up truck, though, because I live in a rural area and I wouldn't want to haul fence posts or horsefeed in such a cool car!
by zotdoc
Wed Aug 23, 2006 7:48 am
Forum: General Discussion
Topic: electric car
Replies: 5
Views: 2961

electric car

thanks smoke, that was a really helpful site!
by zotdoc
Tue Aug 22, 2006 7:07 am
Forum: General Discussion
Topic: electric car
Replies: 5
Views: 2961

electric car

I have recently seen on ebay a good deal on a Seimens traction motor that Ford used for it's now discontinued line of electric vehicles, unfortunately, it is just the motor. I've looked at the Seimens site and at the Ballard design site, but I can't seem to find out where I can purchase the electron...
by zotdoc
Wed Aug 16, 2006 6:21 am
Forum: General Discussion
Topic: monitoring a solar panel
Replies: 4
Views: 2583

Thanks for all the help. I am going to use the panel meter idea.
by zotdoc
Tue Aug 15, 2006 2:14 pm
Forum: General Discussion
Topic: monitoring a solar panel
Replies: 4
Views: 2583

monitoring a solar panel

I want to monitor the output of a 12 volt solar panel with some type of in line volt/ammeter, powered by either it's own supply or possibly from the solar panel itself. I am looking for a small circuit to build that I can leave in place, so expensive VMM's are out. Input on what the best solution wo...
by zotdoc
Tue Aug 08, 2006 9:26 am
Forum: General Discussion
Topic: 90vdc pwm controller
Replies: 31
Views: 19427

90 volt dc pwm

There was a good article in home shop machinist, May/June 1996 issue on a shop built controller by a man named Charles Eyer. I have a copy and eventually will scan the darn thing. I can send you a copy if you would like.
by zotdoc
Tue Aug 08, 2006 9:15 am
Forum: General Discussion
Topic: Electric Cars
Replies: 54
Views: 29764

ev

Thanks a lot for your post smokemaker, especially the link, and welcome to this forum. After looking at some of the conversions, I realized I drive less than 40 miles per day and so the idea fits and I am thinking of converting a small pick up truck myself and using a large solar panel to recharge a...
by zotdoc
Fri Jul 28, 2006 9:37 am
Forum: General Discussion
Topic: Sound generator/insect research.
Replies: 8
Views: 3526

Sound generator/insect research.

I'm doing some research with insects specifically involving the effects of certain frequencies on their behavior. I would like to make a circuit that I can adjust the frequency of sound from very low frequency to very high frequency ultrasound. Can anyone help with circuits or equipment recomendatio...
by zotdoc
Mon Jun 05, 2006 9:20 am
Forum: General Discussion
Topic: USB DEVICE CONTROL in NUT&VOLTS by A.Enzmann
Replies: 33
Views: 18793

Velleman has a kit that interfaces with a usb port and some software to go with it. I put one together and it works pretty well.
by zotdoc
Thu May 25, 2006 2:16 pm
Forum: General Discussion
Topic: plastic injection molding
Replies: 7
Views: 5151

plastic injection molding

I'm thinking about making a home brew small scale platic injection molding machine to make small custom plastic parts. The schemes I've seen involve a heating element, copression ram and injector nozzle for the mold. Anyone have any good circuits to controll the temperature for a nichrome wire eleme...