Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. ×

Comment A few paths (Score 2) 312

I think there are three paths to follow.
Question - where do you want to end up?

1) Find a project you are interested in such as an open source project, game, tool, etc. Figure out how you can contribute be in HTML, web pages, Javascript, database work such as MySQL, PHP etc. Learn whatever tool(s) they are using and figure out how to contribute. The key is to be interested in the project, not neccesarely the tool or language.

2) Pick a language and go through some tutorials. There are tons of stuff on almost every language. Pick one that interests you but stick to something mainstream. This is a good reference to Python for example: http://www.openbookproject.net.... I recommend something that is cross platform and machine independent.

3) Get an Arduino or Raspberry PI and build something. Flash the lights, read the temp, make the propeller spin, etc.


In any of the above - Have fun and don't make it a chore!

Comment How about these? (Score 1) 110

A robot may not injure a human being or, through inaction, allow a human being to come to harm. A robot must obey the orders given it by human beings except where such orders would conflict with the First Law. A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

Comment Re:Why (Score 4, Informative) 201

Batteries can store and discharge about 6-10 times the energy required to create them in their lifetimes.

That number seems very low. Got a source?

I was wondering too and did some searching. It looks like the number is realistic. What I found...

I hope I didn't screw up the math. If I did, please ridicule me and mod me down....

Modern EV batteries which are temperature controlled and charge limited have, so far, shown extremely low degradation over 100,000K EV miles.

The owner of this Volt, who is a member of a Facebook Volt owner group claims to still get the EPA rated 35 miles per charge from his Volt after 120K EV miles...

http://www.voltstats.net/Stats...

I personally own a Volt with 32K EV miles and still get the same EV range...

http://www.voltstats.net/Stats...

One charge in a Gen1 Volt is about 10.5 kWh. This means that over 100K EV miles, a Volt battery stores in the neighborhood of 29 MWh of energy.

1/10 of that would by 2.9 MWh

A quick search shows 828MJ per kWh of capacity to produce a lithium ion battery pack. This equates to 3.68 MWh to produce a 16kwh Chevy Volt battery pack.

https://www.quora.com/How-much...

Given that those Volt battery packs have shown little to no degradation so far, it's safe to say they have quite a bit more useful life to go, so they will probably make it close to 36 MWh of lifetime storage, but they will eventually succumb to the laws of physics though and start to degrade.

Slashdot Top Deals

"Thank heaven for startups; without them we'd never have any advances." -- Seymour Cray

Working...