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Topic: I have 12-24v sensors. (Read 1 time) previous topic - next topic

control123

Hello,

I have 12-24v sensors, as I know i can't put them to digitals.

How can i use these sensors to arduino board?

Should i have to buy something like a to convert 24v to 5v?

Any ideas?

Thanks.

johnwasser

You can reduce 24v signals to 5v signals by using two resistors as a voltage divider.  You want to divide the voltage by about 5 so you need two resistors of value x and about 4*x.  The input pin is connected to ground through the 'x' resistor and the sensor is connected to the input pin through the '4*x' resistor.  The standard 10% resistor values of 1.2k and 4.7k will work and give an output voltage around 4.9v.
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control123

Thanks for information.

From where i can get these resistors, maybe you can include any link to buy ?

Thanks for your reply :)

retrolefty


Hello,

I have 12-24v sensors, as I know i can't put them to digitals.

How can i use these sensors to arduino board?

Should i have to buy something like a to convert 24v to 5v?

Any ideas?

Thanks.


Can you provide a link to your specific sensors? There is just too much room for misidentifying what you actually might have to give good feedback.

Lefty

johnwasser


From where i can get these resistors, maybe you can include any link to buy ?


You can order them from DigiKey.com if you don't have any electronics parts stores like Radio Shack near you:

1.2k
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CF14JT1K20CT-ND
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=S1.2KQCT-ND

4.7k
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CF14JT4K70CT-ND
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CF18JT4K70CT-ND
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