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January 20th, 2007 
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How do i do complex math on circuits without micro-controllers?
For my physics summative I have to make a hygrometer. I've decided on the double thermometer approach and for this I have to alter the values read from these 2 thermometers into some ratio for relative humidity.
TO do this i need to do some math with these temperature values. I have learned simple adder circuits and all that but I have no idea how logarithms or exponential functions would work. I've been told programmable micro-controllers can't be used so is there anyone out there who can tell me what I should be looking at to find a solution. Or better yet give me a solution! Thanks everyone.
It's hard to know what you need without knowing what sort of output your getting from your hygrometer.
One way to do math without a micro-controller is with a ALU (arithmetic logic unit). But there isn't really any way to know if this will work or not without more specifics.
You could also look at a FPGA, but that may count as a micro-controller.
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