- #1
Padford
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Hi
I'm doing my physics coursework, and am rather stuck.
It's on senors, we have to choose a make a sensor and then use/test it etc -
First problem: I'm using a photodiode and, I've put it in parallel with a mulitmeter, reading it's resistance, at different light levels. i have another resistor, that is variable, so I'm going to test the sensitivity of the photodiode at different light level (baisically varying distances from a lamp, in a dark room - not i deal, i know.) Is that a good idea? I'm really not sure if that's any good?
next problem: i have to plot a graph, and I'm stumped - i was thinking about plotting distance/m against resistance, but then the gradient of the graph it redundant.
Can you suggest any ideas? I considered using the potential divider equations, but was unsure which value to put where
(my coursework plan is in for monday, so a quick reply would be greatly received )
Thanks in advance
-Padford
I'm doing my physics coursework, and am rather stuck.
It's on senors, we have to choose a make a sensor and then use/test it etc -
First problem: I'm using a photodiode and, I've put it in parallel with a mulitmeter, reading it's resistance, at different light levels. i have another resistor, that is variable, so I'm going to test the sensitivity of the photodiode at different light level (baisically varying distances from a lamp, in a dark room - not i deal, i know.) Is that a good idea? I'm really not sure if that's any good?
next problem: i have to plot a graph, and I'm stumped - i was thinking about plotting distance/m against resistance, but then the gradient of the graph it redundant.
Can you suggest any ideas? I considered using the potential divider equations, but was unsure which value to put where
(my coursework plan is in for monday, so a quick reply would be greatly received )
Thanks in advance
-Padford