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Forum: Open ReVolt: open source DC motor controller 08-12-2019, 09:50 AM
Replies: 7,381
Views: 2,408,317
Posted By dcb
fwiw, there is the stm gcc-arm-none-eabi...

fwiw, there is the stm gcc-arm-none-eabi toolchain, like johannes uses:
https://github.com/jsphuebner/stm32-sine though it is linux centric, I've compiled his code w/it before.
Forum: EcoModding Central 08-06-2019, 11:16 AM
Replies: 33
Views: 4,867
Posted By dcb
could be that the next fuse is 40 amps instead of...

could be that the next fuse is 40 amps instead of 20 amps though, in which case you doubled your available current/torque, though via destructive testing. Might just be a sheared key, might be a...
Forum: Hypermiling / EcoDriver's Ed 02-06-2012, 10:02 PM
Replies: 193
Views: 33,987
Posted By dcb
This link describes well to tank ghg emissions as...

This link describes well to tank ghg emissions as 20% of the total
http://www.netl.doe.gov/energy-analyses/pubs/Petroleum%20Fuels%20GHG%20Modeling_Feb%2025a.pdf

I can't say how many hydrocarbons...
Forum: Fossil Fuel Free 01-27-2012, 06:12 PM
Replies: 10
Views: 2,807
Posted By dcb
multi speed transmissions for EVs

I think this was missed in the other thread, but there is a case for multi speed transmissions on EVs, even if only two speeds. Plus who doesn't want a neutral to coast in option? :)...
Forum: Off-Topic Tech 01-26-2012, 05:48 AM
Replies: 25
Views: 4,372
Posted By dcb
yah, and even electric vehicles can benefit from...

yah, and even electric vehicles can benefit from having actual gears to choose from downstream of the motor, i.e. so you can climb hills AND go 70mph.
Forum: Hybrids 01-23-2012, 08:42 PM
Replies: 177
Views: 47,820
Posted By dcb
Ken and OldM, don't get me wrong, you guys are...

Ken and OldM, don't get me wrong, you guys are doers, and I respect that very much. But I do get concerned when the myth that people are too stupid to learn is perpetuated.

Usually I see it...
Forum: Hybrids 01-23-2012, 12:53 PM
Replies: 177
Views: 47,820
Posted By dcb
I guess the point is that maintaining the status...

I guess the point is that maintaining the status quo in driver education while advancing the technology to suit is a sub-optimal proposition. The reason we have this forum is in part to address that...
Forum: EcoModding Central 12-23-2011, 06:51 AM
Replies: 48
Views: 5,603
Posted By dcb
just wondering: why do you think heating the...

just wondering:

why do you think heating the air will make the turbine extract more energy in this case?

How does changing the angle of attack on the turbine blades effect turbine efficiency?
...
Forum: OpenGauge / MPGuino FE computer 12-19-2011, 10:12 AM
Replies: 445
Views: 138,924
Posted By dcb
FYI, we are putting new donations on hold till we...

FYI, we are putting new donations on hold till we can clear the existing backlog.

http://opengauge.org/mpguino/
Forum: The Lounge 12-16-2011, 08:54 PM
Replies: 5
Views: 2,837
Posted By dcb
I grabbed all my CDs into mp3 and use a cheap...

I grabbed all my CDs into mp3 and use a cheap player and fm transmitter.

You can get a combination player/transmitter that plugs into your cigarette lighter and takes sd cards for cheap:
...
Forum: The Lounge 11-20-2011, 02:32 AM
Replies: 79
Views: 9,351
Posted By dcb
I'm pretty good at reducing a properties value.

I'm pretty good at reducing a properties value.
Forum: Hybrids 11-05-2011, 09:26 AM
Replies: 86
Views: 13,196
Posted By dcb
What choice do you have but to like it after...

What choice do you have but to like it after spending so much on it? Funny thing about cognitive dissonance :)

Anyway, the patriot in me hates to bash it, but the patriot in me is not happy with...
Forum: Hybrids 11-03-2011, 11:33 PM
Replies: 86
Views: 13,196
Posted By dcb
That is a function of the Electric portion. ...

That is a function of the Electric portion.

If you look at the link in post 2, the bottom of the table "Fleet" Total: says

%ev 70.4
MPG 35.89
MPG(+e) 121.27

It is disingenuous to compare...
Forum: The Lounge 11-01-2011, 07:59 AM
Replies: 42
Views: 5,756
Posted By dcb
You might be wanting to do some homework before...

You might be wanting to do some homework before you start typing too.




A lot of states will allow you to post cash in lieu of buying insurance, new york does not appear to be among them...
Forum: Introductions 10-28-2011, 07:23 PM
Replies: 8
Views: 1,653
Posted By dcb
Hi David, 200mpg bolt on? you are full of crap! ...

Hi David, 200mpg bolt on? you are full of crap! Welcome to ecomodder! :)
Forum: OpenGauge / MPGuino FE computer 10-26-2011, 01:17 AM
Replies: 3
Views: 1,405
Posted By dcb
mine is on, always, about 20milliamps idle. The...

mine is on, always, about 20milliamps idle. The backlight turns off after 7 minutes of no activity. It keeps the setup parameters in eprom, but the trips are in ram for speed/accuracy.
Forum: OpenGauge / MPGuino FE computer 09-22-2011, 11:16 PM
Replies: 445
Views: 138,924
Posted By dcb
Update, we had a snafu with the supply of the...

Update, we had a snafu with the supply of the previous connectors, and they were a royal pain in the behind besides (lots of shorting out in the field).

So to make things simple, and get the units...
Forum: Aerodynamics 09-08-2011, 12:33 PM
Replies: 21
Views: 6,899
Posted By dcb
Chaz (and phil) thanks for expressing this so...

Chaz (and phil) thanks for expressing this so clearly. I am reminded a bit of the discussions regarding potential energy return from closing valve springs :)


FWIW, I finally broke down and...
Forum: The Lounge 08-28-2011, 12:30 PM
Replies: 3
Views: 1,154
Posted By dcb
to soothe the savage leadfoot...

maybe we should post more signs like these :)

http://a1.sphotos.ak.fbcdn.net/hphotos-ak-ash4/297126_273797642636472_100000187160066_1302496_7765106_n.jpg
Forum: General Efficiency Discussion 08-11-2011, 11:27 AM
Replies: 111
Views: 17,646
Posted By dcb
Lets not get another heavy thread, nobody here...

Lets not get another heavy thread, nobody here has the answers to these questions. We can evaluate electric rail in another thread perhaps, starting with basic efficiency numbers, then make it make...
Forum: The Lounge 08-09-2011, 08:27 AM
Replies: 101
Views: 12,343
Posted By dcb
Tell you what Thymeclock, I'll do you a favor and...

Tell you what Thymeclock, I'll do you a favor and put you on ignore. You can continue to freeload off the work of actual hard working eco modders as far as I am concerned for this demented soapbox...
Forum: The Lounge 08-07-2011, 09:20 PM
Replies: 101
Views: 12,343
Posted By dcb
FYI, this is an international forum, one of the...

FYI, this is an international forum, one of the head guys is actually from Canada. Not sure it is the place for gushing patriotic, that would be politics on a whole different level.
Forum: Motorcycles / Scooters 08-05-2011, 12:19 PM
Replies: 250
Views: 63,283
Posted By dcb
thx Pete :) Here is a diagram I slapped together...

thx Pete :) Here is a diagram I slapped together looking at a tall streamlined bike as a "wing" of sorts from the top, don't know if it is entirely accurate and haven't figured out if the wheels...
Forum: Hybrids 07-30-2011, 08:50 AM
Replies: 36
Views: 6,157
Posted By dcb
I have to admit I'm concerned about your...

I have to admit I'm concerned about your expectations here CS1, ryland is discussing the mpg figures where the battery is making a contribution to those miles as well as the generator. I appreciate...
Forum: The Lounge 07-25-2011, 09:26 PM
Replies: 636
Views: 94,965
Posted By dcb
Sorry Larry, Old Mech has the floor now :) ...

Sorry Larry, Old Mech has the floor now :)

isetta is correct
http://farm1.static.flickr.com/10/14490403_ff3d2de8dd.jpg
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