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valy

22 Feb 2012 03:16



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Baiatul de aici ( http://www.glacialwanderer.com/hobbyrobotics/?p=16 ) zice asa:

Before I got started I looked at this wikipedia article about lightning so that I could verify this project would work. It has a lot of interesting information about lightning, but the most useful piece of data in the wikipedia article is the time lapse shot of a lightning strike. From the time lapse photo I was able to determine the duration of a lightning strike is about 100 ms. Then from this page I found my Canon 30d camera has a shutter lag of 65 ms. I know from a past project that if I use a reverse biased photo transistor to detect light it has a response time under 1 ms. The last piece of delay is the software running on the Arduino board and since it’s running at 16 MHz I am sure I can run a tight loop that takes under 1 ms. Adding up all the delays, I get 67 ms which is still much less than the 100 ms duration of a lightning strike so I was pretty confident this would work before I started work on the prototype.

Acum ce am eu ar fi:
- cititul portului analog 100 microsecunde
- vreo 10 milisec am eu un delay prin cod
- shutter lag 0.150 sec ?!
- nu stiu releul cat are, se aude un tacanit cand declanseaza, sper sa nu fie mecanic
Ramane de vazut cum se comporta in practica.