Go Down

Topic: extend the 5v range of the analog pins (Read 936 times) previous topic - next topic


hi, is it possible to extend the range of the analog pins to check a higher amount of voltage? lets say 10, and it will show '1023' on the serial screen when it got the 10v.



thanks very much, i drawed a little schematic with Vin, Vout and 2 resistors, the Vout is 5v and the Vin is 12v, i was still missing one variable on the equation 5/12=R2/(R2+R1) i decided that R2=1000ohms, considering that resistors have a limitted wattage they can handle, and the higher the ohms are, the lower the wattage is.
which means that R1 needs to be 1400 ohms.

i checked just to make sure the values are ok. I = 12/2400 = 0.005,

Vr2 = 0.005*1000 = 5

thanks :)


This article has some additional useful interface tips: http://www.cq.cx/interface.pl
Unique RGB LED Modules and Arduino shields: http://www.macetech.com/store

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131