SCALING DATA VOLTAGE TO ACCOMMODATE PORT SPECIFICATIONS

Hi
If I have a data with a voltage that is higher than what a port of arduino can accept, can I scale it down to 5V keeping in mind that the information in the date is not distorted?

Yes

Sounds like you need a potential divider to proportionally reduce the input voltage down. There are some good potential divider calculators on the internet that you can use if you don't want to work out the resistor values by hand. Some will also suggest the closest matching standard resistor values.

Bear in mind that if your input voltage goes -ve, then you will need additional components to protect the port pin.

Hi,
How much higher than 5V and does it always stay positive with respect to gnd?

Tom... :slight_smile:

TomGeorge:
Hi,
How much higher than 5V and does it always stay positive with respect to gnd?

Tom... :slight_smile:

Hi Tom.
Thanks for your concern. Actually it is a wired remote control. I haven't tried yet but from my search I'm expecting the pulse to be 12V with respect to ground and I think it is always positive.

This should help - but do you want to measure the voltage, or just read in a pulse? If so do you need to know the timing or just whther its a 1 or 0?

Please correct the subject line on your fist post. :roll_eyes:

Paul__B:
Please correct the subject line on your fist post. :roll_eyes:

Please correct your spelling ::slight_smile:

(And maybe stop changing topic titles, unless ABSOLUTELY necessary)

TheMemberFormerlyKnownAsAWOL:
Please correct your spelling ::slight_smile:

Should I have put "ham-fisted"?

TheMemberFormerlyKnownAsAWOL:
(And maybe stop changing topic titles, unless ABSOLUTELY necessary)

Why?

Paul__B:
Why?

Because it is effing pointless

TheMemberFormerlyKnownAsAWOL:
Because it is effing pointless

In which case, you can therefore have no objection to it. :grinning: