No, with a 2.5K RESISTANCE it would, but it's not a 2.5K 'resistance', it's not really an impedance either.

It's a high resistance/impedance input pin with a small capacitance across it, it's the charging of that capacitor which determines the maximum source impedance.

Which was why I said you're wasting your time trying to simulate it in that way.

How fast are you switching input channels?, or are you at all?.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

using a 18F452 displaying wind speed and direction on 20x4 LCD
using the transducer to measure/indicate the air pressure in the air cannon air chamber.
using this data (wind speed, direction, muzzle velocity (two IR sensors 1 foot apart mounted on the barrel) then determind desired air pressure to hit targets at 30, 60,90 yards then shoot for distance.
As far as the transducer doing any fast switching, I think not. All it's doing is indicating air pressure in the cannons air chamber.
have a rotary switch to select which display I desire
DISPLAY 1 = wind speed and direction
DISPLAY 2 = air chamber pressure
DISPLAY 3 = muzzle velocity after firing
using the outputs of all this data, we should be able to determine what pressure to use for a desired distance.
note the data specs on the transducer says the output is adjustable

DS Series Custom Pressure Transducers | Pressure Sensors | Proportion-Air

the transducer is a DSY-150
supply voltage 15-24v
supply current min = 35ma
output = 0-10v but is adjustable

 

Right, so you're only using one analogue input - so it shouldn't matter too much.

In any case, just use two 4.7K to make your attenuator.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

now theres a question
why is it called attenuator.?
another word for voltage divider output or ??
just waiting for 5:13pm today as the auction on the transducer is ending.
these puppies sell for $200+
hoping for under $10 + $10 shipping.

 

Yes, attenuator, potential divider etc.

It's called an 'attenuator' because it 'attenuates' the input.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

Deb.

PIC impedance is not 2.5k.

The maximum recomended 2.5k analog voltage supply exists because of the Sample And Hold capacitor. If the impedance is too high, this capacitor will take too long to charge.

 

YEA baby won the auction on transducer
sells for $200+, got it for $18.50 with shipping
on with design

 

wonder if I need to de-bounce the selector switch?
any suggestions?

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