Arduino + Photoelectric Sensor

Forum 2005-2010 (read only) Hardware Interfacing
1

Hello guys,

I need some help with arduino and photoelectric sensor wiring.
Sensor I have is analogue photoelectric switch, which requires 10-30V DC, but arduino can only provide max. 5V.

http://www.alliedelec.com/Images/Products/Datasheets/BM/IDEC_CORPORATION/814-0855.PDF

So I decided to power the sensor using external power supply. But now I have a problem reading its output.

Can anyone tell me how can I read sensor data if its power source is other than Arduino's?

And also the sensor outputs about 7.5V. Is this OK with arduino analog input pins?

2

Thanks for that answer.
Will try to do everything as indicated. :slight_smile:
Appreciate your help.

3

And one more thing. These are exactly On/Off devices, so how else is it possible to use this, without connecting to analog input?.