Set Default Digital inputs to Low? How? bad Analog value?

[Generalx5]

The sensor belongs to OPTEK technologies, OPB742D and OPB606A are the two sensors Im using.

Here are the Sensor Data,

http://www.optekinc.com/pdf/OPB740.pdf

http://www.optekinc.com/pdf/OPB606a.pdf

The voltage picked up from my Multimeter reads DC 0.4V maximum using a 1.5V double A battery source.

----------------------------------------------------------------------------------------------------------------------------------
Also, in hopes of getting rid of the use of Inverters, I've tried instead of setting INPUT; at the end of the IO's, I set them to 0;

IO4 = IO5 = IO6 = IO7 = IO8 = IO9 = IO10 = INPUT; <---------Before
IO4 = IO5 = IO6 = IO7 = IO8 = IO9 = IO10 = 0; <---------After

And I'm still not sure if it works, although the voltage between SIG and BLK is gone, I havnt found a way to trigger it so it goes high.

[charrisTTI]

Check out this application note.

http://www.optekinc.com/pdf/App_Note_213.pdf

See figure 1 and figure 3.

The collector current of the phototransistor is relatively low.

The OPB606 is 500 uA this can pull down 5V thru a 10k resistor.
The OPB704 is 50 uA this can pull down 5V thru a 100k resistor.

I do not know what the input circuit of your controller looks like, but I would guess that the OPB606 might work with a direct connection as long as pullup is 10k or greater.

The OPB704 will very likely need the circuit shown in figure 3.

[Alan Anderson]

Originally Posted by Generalx5

The sensor belongs to OPTEK technologies, OPB742D and OPB606A are the two sensors Im using.

Those devices are exactly suited to being connected directly to the RC's digital inputs. They don't produce voltage; their output is the equivalent of a contact closure. Tie the "E (2)" pin to ground, and the "C (1)" pin to the digital input.

(And don't mess with the IO direction settings. What they do is determine whether a given pin is an input or an output. There is always a pullup resistor on the pin.)

[Generalx5]

Awesome! It works! Thanks so much for all your help.


Problem solved....I'm sure I'll have more problems later on when we start, but yeah! Awesome!