Using a PIC, we have to count some pulses from a HALL effect device and measure some strain guages.
Any recommendations on a single voltage supply instrumentation amplifier that we could use for both functions?
instrumentation amp recommendations for PIC
Oct 19, 2005
1 Replies
Okay.
Both functions? The Hall device will probably have a digital output and can go (more or less) directly into a digital PIC input. At most you'd need a crude comparator with some hysteresis (perhaps the built-in crude comparator which some PICs have).
Strain gauges require energization and usually some kind of amplification before the typical on-board ADC, but the type of signal conditioning required is very much dependent on the output voltage of the sensor and required accuracy and stability. A silicon strain gauge pressure sensor will probably be *much* less demanding than a metal strain gauge load cell.
Best regards, Spehro Pefhany
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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