Petrol Price Math

For the last couple of weeks I’ve filled up at the same petrol station, and then entered the details into Gas Cubby and the docket price is 2 cents different from that displayed on the ipod….

Fuel Docket

2.119 x 27.94 = 59.20486, which should round to 55.20

I could forgive 55.21, but really 50.22, that’s magic rounding, or they are using more decimal places than shown.

To make the checking easy I’ll assume infinite precision and thus the rounding will trend towards .5 of the last digit. 2.1195 x 27.9405 = 59.2198898 thus 59.22, so it could be both figures are misrepresented or just the $/litre, as when you don’t fudge the price and only the litre amount the total rounds to 59.21.

Or maybe they  just have bad programmers and the company is not evil.

Which reminds me of how my TelstraClear (now Vodaphone) bill never added up. If you telly the sub totals reported to 2 decimal places, the total was off 1 to 2 cents every bill. Scary was that two of three sections were fixed price, and the third was fractional. So how they did that I was never sure.

Bricked My Camera

Sigh, I loaded my first altered firmware on my trusty D5100 on the 25th November 2011, and my last on 22nd May 2013.

Strangely enough we are not sure what was wrong with the patch, weather the area we put the code in was not truly free space,  or if the area we were putting data in was not spare, if the jump to the new code was wrong, was the return wrong, was there an error in the code, or did we take to long and a watchdog triggered.

[Edit 7 July 2013] Hi Nikonrumor people, the problem with the patch was an incorrect sequence of assembly instructions used, and it was a development test patch. So “released” patches are much more “safer” but there is still a real albeit small risk.[Edit]

It’s hard to know but the camera doesn’t boot anymore. The led doesn’t even flash when you put batteries in/out.

So now I get to buy myself a new camera, it’s a little frustrating, as the project had been getting donations, but we had not gotten enough for a D5100 body yet and my plan was to get one for one of the other developers, so we could speed up testing time, and spread the risk. The other guys have different models so are not directly applicable at this “but how does it all work’ stage. And because I started the project we were focusing on the D5100 model as it was the most understood.

If my camera was damaged and I could claim insurance, I wouldn’t get a replacement D5100, I’d likely step up a model, not because I’d out grown the D5100, it’s a fantastic camera, it’s just I’m prepared to spend a little more to get more, compared to when I brought my first DSLR. But getting a D5100 makes the most sense as that’s the model we know the most about from a team perspective.

I rang the Nikon Service centre and it will cost 50% of the new camera price to replace the mainboard. And you can buy replacement off ebay for half that again, but I’m not a hardware guy. They plan is to send the body to a team member and see if they can get the JTAG link working to force reprogram it.

Michaela joked that I should dump Nikon and go with Canon, because of ‘disgust with a camera that’s so easy to break’. She took the news better than I expected.

So ignoring the Canon joke, I’m torn between personal camera needs/wants, and project team needs, and I’m wondering if there’s any community opinion, and if the community is willing to help fund that opinion in anyway?

I’ve previously not directly asked for money for camera bodies, as I didn’t want to ask before having something to show, and I felt we could stop at anytime without feeling a huge sense of dept to the community. So I’m keen to understand what people think.

By the way, we have been able to partially dump the D7100 and it’s ARM based verse Fujitsu FR based and uses a different OS. So the newest camera’s are a whole different kettle of fish, but should be easier to work with, as there is more ARM based disassembly tools.