K8023 and Arduino processor

Kits Automotive projects
1

Hi,

I have purchased and assembled a K8023 and K8045 kit. Both of these I can connect to each other and they work fine. I would now like to use the output of K8023 to be used as the input for an Arduino Duemilanove. Simple you may say but, as the K8023 has a negative/ground output and the Arduino expects a 5v input I’m stuck. Can anyone advise the best way to do this, or can I take the wire that goes to the test LED’s on the 8023 and use that as a switch 5v signal? (Haven’t yet checked the schematics to see if it is a -ve or +ve switched LED!)

Thanks

2

If you provide a pull-up resistor of say 4K7 from each output of the K8023 to the +5V, then you get your 0/5V outputs.
Careful: outputs will be inverted i.e. switch closed: 0V, switch open: 5V

3

If I understand this correctly then I should do it thus;

And the inverse result will be as shown here above.

4

Yes