I have MK120 Light barrier and it works fine, I would like to run it from 12V DC power supply.
**broken link removed**
These are given specs:
transmitter emitter: 9Vdc, 50ma max.
receiver detector: 9Vdc, 20ma max
So to run at 9V DC I need to add 43 Ohms resistor in series to get 9V from 12V?
Or can I run them from 12V directly?
Or perhaps it's better to change some resistors on PCB, if so what components needs to be changed?
Here is light source schematic:
http://www.velleman.eu/downloads/files/schema/transmitter.jpg
Here is sensor schematic:
http://www.velleman.eu/downloads/files/schema/receiver.jpg
Thank you.