How do you operate pre-cRio robots

[MrForbes]

Originally Posted by EricH

QFT. And the whole "power the OI" (Mr. Forbes... You're forgetting the good ol' days again ) .....

I didn't forget, I just wanted to use terminology that today's students would understand.

[Al Skierkiewicz]

To remind everyone, the radios of old were really just disguised wireless serial ports.
And if we are going to get nostalgic, 'I remember when we didn't have back up power on the robot controller and it would reboot if drove too hard.'

[Whippet]

Originally Posted by Al Skierkiewicz

'I remember when we didn't have back up power on the robot controller and it would reboot if drove too hard.'

Doesn't that happen now, too?

[techhelpbb]

Originally Posted by Al Skierkiewicz

To remind everyone, the radios of old were really just disguised wireless serial ports.
And if we are going to get nostalgic, 'I remember when we didn't have back up power on the robot controller and it would reboot if drove too hard.'

Nothing wrong with serial ports

http://www.pcmuseum.ca/gallery/FanExpo2011-02-750.JPG

I feel the need, the need to get out my Hayes compatible 300 baud Commodore modem cartridge and dial a BBS.

ATDT 1877IIABDFI (442-2334)
If
It
Ain't
Broke
Don't
Fix
It! (credit to Bert Lance) (the link example is ironic)

(BTW that's a disconnected telephone number right now...)

[Al Skierkiewicz]

Luis, It was pretty bad in the pre backup battery days. I seem to remember an 8 volt limit. Fall below that and the controller or radio would reset. The backup battery would hold the controller and radio up while the PWM outputs would be disabled.

[Andrew Schreiber]

Originally Posted by Al Skierkiewicz

Luis, It was pretty bad in the pre backup battery days. I seem to remember an 8 volt limit. Fall below that and the controller or radio would reset. The backup battery would hold the controller and radio up while the PWM outputs would be disabled.

Didn't all Servos run off the backup battery?

[Al Skierkiewicz]

Yes, but pre-battery they were fed from controller power.

[cbale2000]

Back on the old controllers though, even if the controller did reset you were looking at a maximum of like 5 seconds of downtime, when the current system goes down you're out for almost the entire match.

I for one support bringing back the backup battery.

[techhelpbb]

Originally Posted by cbale2000

Back on the old controllers though, even if the controller did reset you were looking at a maximum of like 5 seconds of downtime, when the current system goes down you're out for almost the entire match.

I for one support bringing back the backup battery.

Well I can say this....

I watched Team 11 drive the robot down to 6V with the RoboRIO onboard.
They periodically would loose field comms but for a short time (3 second tops).

I think the RoboRIO has some undervoltage protection going on.

[magnets]

Originally Posted by techhelpbb

Well I can say this....

I watched Team 11 drive the robot down to 6V with the RoboRIO onboard.
They periodically would loose field comms but for a short time (3 second tops).

I think the RoboRIO has some undervoltage protection going on.

We've had an older battery hit 5.2 volts in a match before. Needless to say, we couldn't have done that without the backup battery.

[techhelpbb]

Originally Posted by magnets

We've had an older battery hit 5.2 volts in a match before. Needless to say, we couldn't have done that without the backup battery.

Preaching to the choir

[Bob Steele]

just sayin'
They didn't need no stinking wireless... they used wires...

I wasn't there but I bet many remember this.

[scca229]

Originally Posted by techhelpbb

Nothing wrong with serial ports

http://www.pcmuseum.ca/gallery/FanExpo2011-02-750.JPG

I feel the need, the need to get out my Hayes compatible 300 baud Commodore modem cartridge and dial a BBS.

ATDT 1877IIABDFI (442-2334)
If
It
Ain't
Broke
Don't
Fix
It! (credit to Bert Lance) (the link example is ironic)

(BTW that's a disconnected telephone number right now...)

Is it wrong that I had DTMF tones along with handshake going through my mind when reading this?

[techhelpbb]

Originally Posted by scca229

Is it wrong that I had DTMF tones along with handshake going through my mind when reading this?

It's only wrong if you prefix it with a Capt'n Crunch whistle .

or

Follow it with: "Shall we play a game?" from an SP0256-AL2.