AS Sensor Coursework Ideas: Spinning Disc and Phototransistor Setup

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The discussion revolves around seeking ideas for AS Sensor Coursework, specifically involving a spinning disc setup with a phototransistor and oscilloscope to measure frequency and rotations per second. The user expresses uncertainty about project requirements, which include designing a sensor circuit with a focus on potential dividers or Wheatstone networks. Suggestions mentioned include measuring water levels with a rotary potentiometer, but the user is looking for more innovative concepts. Clarification on the coursework requirements is requested to guide the project selection. Overall, the conversation highlights the need for original sensor project ideas within the constraints of the OCR Advancing Physics course.
richMMIV
Hello there!
My AS Sensor Courswork plan is due in a week today and i really don't know what sensor to use and what to do
The best I've come up with so far is to use a spinning disc with a hole in it in front of a lamp and using a phototransistor and oscilloscope to work out frequency and rotations / second. I really need some more ideas.. so any help would be very welcome.
Thanks.
 
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It would help if we knew what the requirements were...
 
Its hard to explain the requirements on here because we have pages of it! Its basically a simple all-round test of a sensor designed in a circuit for a particular purpose.. with a slight emphasis on the use of a potential divider or wheatstone network. For anyone familiar with it or that's done it its on the OCR Advancing Physics course.
 
Hmm for AS-evel course work you shouldn't really have posted in the College Help forum.

I think it would be best if you can provide more info :-/
 
Sorry. I'm in college so i thought itd make sense! :/
I'm really looking for anyone that's doing the course and might be familiar with the sensor coursework. There's some suggested project ideas like measuring water level with a rotary potentiometer and the spinning disc one but i was hoping someone might have a more original concept!
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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