PDA

View Full Version : Observation concerning Propeller Control Board



Tom C
01-24-2009, 02:25 AM
Hi all,

I recently purchased a Propeller Control Board (PCB)·and was getting ready to add some Parallax +5vdc sensors to their PCB mounts when I noticed that there does not appear to be any current limiting resistors between the outputs of the onboard sensor mounts·and the·their respective Propeller inputs.

Is this issue my imagination and I am not reading the PCB schematic correctly or did Parallax forget to design in·the appropriate current limiting resistors between the +5vdc sensor outputs and the·their respective·Propeller inputs?

Comments?

Regards,
TCIII

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
If you are going to send·a Robot·to save the world, you·better make sure it likes it the way it is!

Mike Green
01-24-2009, 02:50 AM
If you look at the schematics for the sensors themselves, you'll see that they have their own current limiting resistors, so the PCB doesn't need additional ones.

Tom C
01-24-2009, 06:40 AM
Hi Mike,

Thanks for the input. Hadn't thought about that.

Regards,

TCIII

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
If you are going to send·a Robot·to save the world, you·better make sure it likes it the way it is!