paper: How to Get Multiple Cameras on Robot

[CodeMonkey]

Thread created automatically to discuss a document in CD-Media.

How to Get Multiple Cameras on Robot by CodeMonkey

[apalrd]

Is there any reason why you use the 12v-5v regulator instead of just connecting the second camera power to the PD board's 5v regulator?

[baronep]

I second the previous question. Why cant you run both cameras on the same 5 volt power supply on the PD board. Is it against the rules? And if it is, why? Its not like it would be dangerous or anything?

[baronep]

This seems to suggest that it would be allowed...

"All electric power utilized by the Robot shall be distributed from the load terminals of the PD Board (not the M6 shanks).
The cRIO power input must be connected to the 24 Vdc supply terminals on the PD Board. With the exception of one Solenoid Breakout Board, no other electrical load can be connected to these terminals.
The wireless bridge power feed must be supplied by the 5V converter (model # TBJ12DK025Z) connected to the marked 12 Vdc supply terminals located at the end of the PD Board (i.e. the terminals located between the indicator LEDs, and not the main WAGO connectors along the sides of the PD Board). No other electrical load can be connected to these terminals (please reference any 2012 Robot Power Distribution Diagram posted on the Kit of Parts site for wireless bridge wiring information.
All other branch circuits must connect to, and have power sourced solely by, a protected 12 Vdc WAGO connector pair or the 5V supply on the PD Board.
Only one wire shall be connected to each WAGO connector on the PD Board. If multi-point distribution of circuit power is required (e.g. to provide power to the three KOP breakout boards via one 20-amp circuit), then all incoming wires must be appropriately spliced into the main lead, and only one lead inserted into the WAGO connector to connect the circuit.
"

[CodeMonkey]

We just weren't sure if we could supply enough power for both cameras out of one wago so we used the converter so that each one could be separate.

[baronep]

According to datasheet for the Axis camera, the camera peaks at 6.5Watts which at 5volts is 1.3 amps. The PD board can supply up to 3 amps off of the 5v power supply. 2.6amps<3amps so I am pretty confident that it would word.

[CodeMonkey]

Ok. We will try this and see if it works and I'll let you know.

[DavidGitz]

We have been using another 12V-5V Power Converter to power our Axis M1011 camera and notice the camera reboots after 3-4 minutes of heavy robot use (i.e. running 2 practice matches). Anybody else seeing that issue? We may try running it off the 5V Wago supply if people indicate that it works well.

[cgmv123]

Originally Posted by DavidGitz

We have been using another 12V-5V Power Converter to power our Axis M1011 camera and notice the camera reboots after 3-4 minutes of heavy robot use (i.e. running 2 practice matches). Anybody else seeing that issue? We may try running it off the 5V Wago supply if people indicate that it works well.

3-4 minutes of heavy robot use would tend to draw down your battery below 7 volts, which would cause the converter to stop functioning.

[DavidGitz]

Originally Posted by cgmv123

3-4 minutes of heavy robot use would tend to draw down your battery below 7 volts, which would cause the converter to stop functioning.

Maybe it's too late for me, but with this line of logic wouldn't the robot radio be rebooting as well? Since it is not, I don't necessarily agree with this. And isn't that the point of the 12V-5V Converter anyways?

[Alan Anderson]

Originally Posted by DavidGitz

Maybe it's too late for me, but with this line of logic wouldn't the robot radio be rebooting as well?

The 12V-to-5V converter for the DAP-1522 is connected to an up-regulated 12 volt output. It won't drop out until the robot battery goes very low, about 4.5 volts.

[baronep]

Have we decided whether or not a judge would get freaked out by the 5volt regulated power feeding both cameras?

[Alan Anderson]

Why would a judge care?

If you're talking about whether it would pass inspection, I know of no rule that would get in the way.

[juchong]

I can confirm that this works. You can run two axis cameras from the PD board without any issues. Also for reference, a single camera draws about 250mA under normal use, so you're well under spec there even with two cameras!

[rachelholladay]

Thank you very much for posting this document. I had one question. You guys showed how to edit the dashboard code, which I followed easily. However, I would assume you would have to edit the robot code too, right? Would you just copy the code for the first camera to add the second?