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  • Users: kennyden
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  1. kennyden

    Ca I use a surface mount 0603 LED as a photodiode?

    Hello guys, I understand from reading this great paper at "http://www.merl.com/papers/docs/TR2003-35.pdf" that an LED can basically be used as a light sensing device for communication (surprised don't you!?) Well perhaps some of U? So my question is: has anyone tried this using a...
  2. kennyden

    Database vs embedded systems (Excel or else)

    Hello, I'm new to VB in MS Excel and I have some very specific questions before I dig into it further. But first, here is basically what I'm trying to do : I need to upload data (such as dates, names etc..) to my embedded application which runs on a microcontroller. This uctrl has a USB host...
  3. kennyden

    4 layers VS 2 layers PCB cost AND carbon printing ?

    Hi, Question #1: I'm currently using a 2 layers board for my prototype. Obviously, the design would be much cleaner if I'd be using 4 layers. However, having a seprate ground and power plane for a 6 inches sqr PCB is what I beleive to be luxury. Nevertheless, how much more should I expect to...
  4. kennyden

    Calculating battery life

    Hi, I'm trying to calculate the service life for my battery powered application. Here's how I calculate it. Please le me know if this the right way to do this. I'm using 3X1.5 Volts AA type alkaline batteries -put in series- (energizer titanium e2) rated at "3135mAh (down to 0.8 volts)". My...
  5. kennyden

    How to calculate battery life for specific application

    Hi, I'm trying to calculate the service life for my battery powered application. Here's how I calculate it. Please le me know if this the right way to do this. I'm using 3X1.5 Volts AA type alkaline batteries -put in series- (energizer titanium e2) rated at "3135mAh (down to 0.8 volts)". My...

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