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Old 22nd July 2004, 11:48 AM   (permalink)
Default Finding the Average of 2 voltages

Hi,

I am making a micromouse and am currently working on the sensors (got one set working ). On the left and right hand sides there will be a pair of sensors that i had planned to feed the analog output to a PIC and run a ADC on both line then calculate the average. I was wondering if it was possible in a relitvely low number of components to average the 2 voltages then read it on the PIC ADC.... (It should speed things up a bit)

Any ideas?

Thanks,

- Martyn
pittuck is offline  
Old 22nd July 2004, 11:51 AM   (permalink)
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Geez. I wonder how much you would save. But you could do a summing amplifier with gains of 0.5
checkmate is offline  
Old 22nd July 2004, 11:57 AM   (permalink)
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Its not so much for saving time, its for saving wires, i can handle 8 wires to the base to feed / recieve from the sensors, but 12 is a bit too much...
pittuck is offline  
Old 22nd July 2004, 12:09 PM   (permalink)
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Or you could just put a resistor-divider between the 2 voltages using equal resistors. The center of the divider will be the average of the 2 voltages.

All you need is 2 resistors
Exo is offline  
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