Path: utzoo!dptcdc!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ukma!rutgers!cmcl2!phri!cooper!dasys1!aj-mberg From: aj-mberg@dasys1.UUCP (Micha Berger) Newsgroups: sci.electronics Subject: Re: Light Duration Meter Summary: School vs Reality Message-ID: <9380@dasys1.UUCP> Date: 18 Apr 89 13:46:11 GMT References: <102@raider.MFEE.TN.US> <9318@dasys1.UUCP> <1974@godiva.oakhill.UUCP> Organization: The Big Electric Cat Lines: 24 I wrote: > Here's my 2 cents. Use an op-amp integrator to integrate instead > of the capacitor. Have a photocell as the input voltage to be integrated. Matt Pressly wrote: > It looks like even small leakage through the feedback capacitor in the > integrator would cause pretty inaccurate readings, especially after > integrating over a period of around 12 hours. Sorry 'bout that. My "experience" with circuit design was at Columbia Univ. You ever notice that when you are a student capacitor's don't leek, noise isn't a function of circuit layout, etc... Which leads me to make next suggestion: All employers: Hire colledge students to design and assemble your product. The obvious advantage of putting out circuits that use ideal components will eat up the extra R&D costs. Seriously, why isn't their a course on "Removing the Simplifying Assumptions"? -- Micha Berger Disclaimer: All opinions expressed here are my own. The spelling, noone's. email: ...!cmcl2!hombre!dasys1!aj-mberg Aspaklaria Publications vox: (718) 380-7572 73-32 173 St, Hillcrest, NY 11366