I’ve recently become fascinated with generating electricity. I’m going to post information that I learned in regards to solar and manually generated electricity. I am starting with a very limited understanding of electronics, so hopefully these posts will be a useful resource for someone just starting out with electronics.
I think my first step will be acquiring a handcrank generator from the dollar store or eBay. I will use it to attempt generating enough electricity to charge a cell phone. I will record the electrical current generated by the crank using a multimeter and record my findings. I will also attempt to connect this crank to a bicycle wheel to increase efficiency of charging. Once I have a good understanding of the efficiency and quality of the charger I will then attempt to connect a rechargeable battery.
The same process listed above will be attempted with a solar panel. Information regarding that will also be posted as I progress through the project.
Please feel free to post any advice, recommendations, or questions in the comments section below.
The bottom of my new iphone 5′s screen has horizontal lines that are shaking. Anyone else having this problem?
While loading up the new Yahoo Axis app on my jailbroken iPad, I got notifications from my software firewall (Firewall IP) that the app was trying to connect to zenfs.com. I thought this was kind of strange. I looked into it further and found that zenfs.com is a media host for yahoo and other site. But, I was pretty uncomfortable with the lack of explanation the internets as to what the site is and who they are. It would be nice if they have a simple homepage that explained what their deal was, instead the only real info I was able to find about zenfs.com was from Google’s Safe Browsing diagnostics page. Google tags zenfs.com as having hosted
malware malicious software. So all I really know about this company is that they may host malware malicious software and that yahoo has included it in their Yahoo Axis code…no thank you! I was initally interested in Yahoo Axis, but now I don’t want anything to do with it.
Update: It also looks like Yahoo left their private certificate key in the code for their Axis plugin (Chrome): http://twitter.com/#!/nikcub/status/205489752684765185
Google just released a Gmail app for the iPhone/iPad/iPod (ios 4/ios 5), but it comes with the following error: “no valid ‘aps-environment’ entitlement string found for application”
This error seems to be associated with a bug in the apps push notification system. I’m sure an update will be pushed through soon to fix this problem. Until then, the Google Gmail app isn’t going to be so useful. Kind of sad to think that with this bug, the crummy native mail.app is more useful.
Has Google released a product in the past three years that didn’t have problem from launch? It seems like they have a few fantastic products, but a bunch more that don’t ever take off. Remember the Google 3D virtual room thing? What the hell was the deal with that?
Update: Google has already pulled the Gmail app from the Apple app store: “The iOS app we launched today contained a bug with notifications. We have pulled the app to fix the problem. Sorry we messed up.” (Link to Official Tweet) If this were something from a small developer I’d be more inclined to understand, but seriously Google? With as rigorous a hiring scheme as you have, this is the best you can do?
Why isn’t there a usenet binary downloader for the iphone or ipad?
I read over on sabnzbd’s forum that they are avoiding such an app because of battery issues. I have no problem plugging in if it means I can download on the go without having to bring a computer. This has already been done with torrents (even without jailbreaking): http://www.redmondpie.com/how-to-download-torrents-on-iphone-ipad-without-jailbreaking-tutorial/
I’m sure there would be a number of people willing to pay through Cydia to getting a working usenet binary downloader.
Please post a comment if you have any insight into why such an app hasn’t been created.
Elimination versus Substitution Reactions:
The first step to understanding SN2, SN1, E1, and E2 reaction mechanisms is to ask yourself two questions (CCSF, Dr. Pauly 2011):
- Is the leaving group on a primary, secondary, or tertiary substrate?
- What are the characteristics of the nucleophile/base (Strong or Weak)?
After you identify the substrate go to the appropriate section below. Then, using a pKa table with conjugate bases (I’ll upload one soon), determine if your regent is a strong nucleophile and/or base. Read the rest of this entry »
I just listened to the new SaReGaMa album Fractal Universe: http://www.jamendo.com/en/album/100284
The album is quite great. A few of the tracks took my mind back to a beautiful memory of sitting in a tea house in Prague with a very special friend. We would lay in the tea house listening to music, drinking tea, and eating snacks for hours on end. I have never been is such a peaceful place before or since.
Take a listen to the album and if you are ever in Žižkov in Prague make sure to stop at Cajovna Genesis: http://www.cajovnagenesis.cz/
So…did you just jailbreak your amazing new idevice to find that cydia is just a white icon and won’t load? Well a goat is here to help. All you’ll need to turn off your idevice (iPhone 3GS, iPhone 4, iPhone 4s, iPad 1, iPad 2, iPod touch. Note that the iPad 2 and iPhone 4s are not yet supported for jailbreaking.) and load up redsn0w or whatever you used to jailbreak, set the program for “just boot” and follow the steps.
If you have any questions or if this fix worked for you, please leave a note in the comments.