A reminder for some memebers as to what the F stop is all about.

Started Jan 26, 2014 | Discussions thread
bobn2
bobn2 Forum Pro • Posts: 62,184
Re: After reading your " Sensors measure charge not current"
5

rhlpetrus wrote:

bobn2 wrote:

gsergei wrote:

I am positive you have never finished your high school.

If you mean that I have never stopped learning, you are right.

Overall - a superb technical illiteracy. Can't argue with you, sorry.

I had realised that you can't argue with me, and yes you do display exactly the illiteracy you talk about.

BTW, the term "charge" is used for capacitance and is measured in Culons or Farades as in capacitors, not light sensitive diodes output , which is voltage/current.

'Coulombs' (for that is what it is) is the unit of charge. 'Farads' (for that is what they are) are the unit of capacitance. They are not the same thing, but related by the formula Q=CV - i.e. the charge is equal to the capacitance times the voltage. Maybe best to work those out before trying to explain how a sensor works.

Bob, this is hopeless.

Hi Renato, it depends which bit you think is 'hopeless'. Agreed, there is probably no hope of actually teaching gsergei anything. On the other hand, via the discussion, a few fewer people might end up thinking he's right.

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Bob

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