LED flashers
 

I'm wondering what the teams thought of the LED flashers this year, instead of the revolving dome light.

From a spectator/ref view, I found them very hard to see. I didn't think they were bright enough, especially since many teams put them in strange/out-of-the-way places.
They are also very hard to see once the match has ended. When the robot is disabled they only flash every 5 seconds or so. I'm sure this could be changed with a simple adjustment.

Any thoughts?

Re: LED flashers
 

I thought they were a step in the right direction.

I agree with everything you said, especially the after-the-match-ended flash rate.

I know you are asking for opinions, but here is one thread on LED's: http://www.chiefdelphi.com/forums/sh...ad.php?t=26878
and there are a couple others about them as well!

Re: LED flashers
 

True. When watching machtes you couldn't really tell which bot was on what alliance which made scoring difficult. What we did is we CNC'd a light mount. It workes pretty good. I'll try and upload a pic.

Re: LED flashers
 

In all honesty if you really were superbright leds then no one would have any problems seeing them.

Re: LED flashers
 

I thought the lights were pretty stupid. As much as I hated mounting the dome light, it was still much easier to see and it actually served a purpose. I think I could send our robot out with no lights on it and few would probably notice. It is a step in the right direction because they're smaller and lighter, but functionality was compromised with this change to the kit. I would like to see something brighter that blinked longer in shorter intervals for next year.

Re: LED flashers
 

I would agree that they are a step in the right direction. They had their pros and cons, but like with the light I’m sure FIRST will strive to find better ones.

LED Advantages:
Smaller, don’t have to find placement in robot
No changing of the cover or teams with the wrong cover. (Not that it ever happened :ahh: )


Light Advantages:
More robust (If the LEDs are not shielded they pretty much explode on any sort of impact)
Brighter

Even as is, I like them better. (As a Mech E, the wieght and size sold me ;) )

Eric

Re: LED flashers
 

Eric's direct quote was:
"Who cares if you can see them or not! It's lighter! More MechE weight!"

Re: LED flashers
 

I LOVE THEM...

There are many resons why i like these so much. One ius the changing of technology, isnt that what FIRST is all about? Also its alot less field lint i had to worry about as Field Reset Manager in NYC. Plus No more worying about finding a blue or red cover that isnt broken for our next match. Also they were DESIGNED BY IFI . I had a loing talk with one of the designers over this past weekend and i learned alot more about these and my mind was pushed into liking them even more. Also they are lighter and easier to mount, no more wiring to a spike, now directly pinned to the RC. Also they are easier to obtain and take up less space in the spare parts bins at events so theres more available. But like many other have said they seem to need to be brighter and blink a few more times/sec during manual control, kinda like they do in auton mode.

Re: LED flashers
 

I liked them more than the spinning lights. They're just a little bit closer to Death Lasers. :)
Seriously though, I was in the second level of seating at the competition and I could see the lights fine, even on some of the bots with...interestingly placed lights. I guess it's different when you're on the ground.

Re: LED flashers
 

Personally, I sometimes had a bit of trouble discerning the LEDs. I wound up using context clues (team number, where the drivers were looking, etc.) to figure out alliances.

Perhaps either a tweaking of the LED flashing is in order, or maybe (and I know this sounds low-tech) a flag that teams have to mount on their robot once it hits the field? Just pop it on the top when you set up, take it off when you get off, no weighing or measuring or any of that. If nothing else, it'll make things that much easier to see for the spectators (which FIRST is trying to aim for--to a point). I pity the poor folks who were sitting way up at the top of the stands at Palmetto. I shudder to think what would happen had they opened the upper deck up!!

Re: LED flashers
 

I picked up too many of the flasher covers off of the playing field carpet. Most were pulverized into something just short of dust. I'll bring a dustbuster to Atlanta. ;)

Re: LED flashers
 

I heard something about this. Other than the nice changing blink-rates for different periods, I think they also mentioned that certain error states can be discerned from afar by the blink rate/styles.

Re: LED flashers
 

I found the LEDs worked best at extreme distances. For instance, when I was wathcing a match from about 150ft away I could easilly tell which color a robot was.

Of course, it was much easier to distinguis during autonomous mode. With a brighter LED, and a quicker flash, I think the new LEDs would be perfect.

Re: LED flashers
 

Ah... but imagine the possibilities now that we have LEDs controlled by the field instead of a dome controlled by teams...

... the computer randomly assigns you to an alliance at the start of a match ;)

... the computer randomly reassigns all robot alliances 1 minute into match ;)

... the computer randomly assigns each robot a different color - and that color determines which of the four objects in your goal you get points for ;)

... the computer randomly assigns each robot a different color... which tells it which color ball to knock off a tee in autonomous ;)

... the computer randomly assigns each robot a different color... which matches a different IR beacon frequency. :)

The possibilities are endless! Isn't it great?!?!?!?!

Re: LED flashers
 

hmm...2v2 that becomes a new 2v2 midway.

I could see the potential for disaster...but if you applied the idea to FIRST Frenzy, it'd be kinda interesting to see the strategies. Maybe next year.

Re: LED flashers
 

Actually, the lights do double duty as diagnostic indicators for the IFI field manager. He showed me the sheet at West MI that showed about 10 different problems that are reported be the LED's during setup that you simply could not do with the rotating light. Maybe someone will come up with a nice little light stack design on a post or something.

Re: LED flashers
 

I'll agree with the robustness but not with the brightness. LED's are slowly replacing the light bulb because of their brightness. I have noticed that a lot of stop lights on Long Island use LED's. I can actually see the individual LED's when I drive by. Also, there has to be a compromise. You don't want to blind the people working the robot. I wonder if there is a differnce in the power consumption between the LED's and the revolving light.

Re: LED flashers
 

They've got those here too and I too can make out the individual LEDs. But I bet you if it was only 1 individual LED up there you wouldn't see a thing. Plus, each individual one in those is larger and brighter than in ours and they have a better lense.

Re: LED flashers
 

I like the LEDS they gave us this year. They could made much better though. I thought I read somewhere that they made these last minute but they now have plenty of time for improvement! :D

They could be made more robust. They also could be made easier to mount. They could also be a little brighter.

We came up with a LED tower at the last minute. all 4 LEDS are mounted on a 1 by 1 piece of aluminum tubing. We also took a whole lot of weight off by cutting nearly 75% off those 4 foot long wires :eek:

We did break one lens cover when our bot flipped (got the zip ties out)

Re: LED flashers
 

Ehh, I don't know how interesting it would be. Stationary goals would become useless. Your human player can't hit the opposite side of the field's stationary goal. You couldn't use the mobile goal because your color might change. Your only options would be to sit for a minute or hang.

I think there will have to be a lot of thought put into a game where the alliances change mid-way ;)

Re: LED flashers
 

I think that the LED's were a good change. They definitely saved weight, although you could save more if the cables were only about 6" long to start with, then you could use extensions if needed (4' is excessive).

The LED's definitely need to be brighter, but that gets to be tough in SMT LED's. 5mm LED's can be so bright that they blind you, so you would have to use something to diffuse them or use diffused LED's (the lens assembly would probably do the trick, just as in the flashers that certain teams have as souvenirs). (We could use 2 Luxeon LED's behind the lens and that would definitely do the trick!)

They definitely take less energy to power, probably ~200 ma in a short pulse rather than an amp or so constantly for the revolving light (I think that's what it took).

It would be good to have the LED's flash more all the time, because that would make them seem brighter.

It would also be easier to mount if it was designed to be like a rotating light--an all-in-one, cylindrical unit that only has one set of wires.

Re: LED flashers
 

I'm new to robotics this year so I dont have experience first-hand with the old lights, however personally I thought the LED flashers served no purpose but as non-functional decorations. They were hard to see and the covers kept comming off. However, I do agree that they are a step in the right direction. They are smaller than the old lights and thats important.

*audrey*

Re: LED flashers
 

That's the beauty of the new lights. You are very flexible in your options for placement. Don't have a lot of room? Add one to each side with double sided tape. Have room and weight? Make a heavy duty holder out of aluminum and lexan.

With a little more power these things will be perfect. Kudos IFI :D

Re: LED flashers
 

What I would like to see is the lights stay full on, with no blinking, if the robot is disabled and connected to the field controller. That way, it is easy to tell which team is which at the end of a match.

In the matches I watched, the state of the LED after matches seemed to be random -- sometimes on, sometimes off, sometimes both colors on.

Re: LED flashers
 

Just a note to all teams. If you have contact cement then a small amount on the rim of the cover will hold on the covers very well. Good luck in Atlanta, see you there.

Re: LED flashers
 

I thought the LEDs were much, much better than the rotating light (especially after the big deal last year about how you have to mount the rotating light, how much has to be visible, can it be hidden for a time, etc.). Personally I don't even use the lights to tell whos on what alliance during matches - unless I walk in during the middle of a match, but I didn't think the LEDs are too hard to see (unless you're watching through a camera).

I'd say stick with the LEDs next year, but making them brighter maybe, and change the blink pattern (maybe not blink at all?).

Re: LED flashers
 

Ithink that the LED flashers are cool, but our team tried to hard to make them look cool (placement). Theyt are much less cumbersome than the gig one though

Re: LED flashers
 

This is due to teams removing their controller/OI from the station. That will cause them to go random and sparatic, but if the OI is left plugged in, then the proprer color will be displayed and also the proper blink pattern will be displayed.

Re: LED flashers
 

Maybe a suggestion for IFI's firmware department:

1. Reset team color
2. Recieve channel number (color)
3. Run match as normal
4. At the conclusion of the match, continue blinking the light at the last known color. Perhaps even at a different rate. Continue blinking this color until an RC reset.

Re: LED flashers
 

I really like the new LED lights this year. While on the field during competition, I could make out the colors fine. When I was "forced" to watch the webcasts of the competitions I couldn't attend, I found it hard to tell the colors of the teams. IFI did do a great job w/ the LEDs this year. In the future, I think I’d like the lights to be more solid while competing on the field, and blinking at a certain rate (like they do now, acting as a diagnostic tool) when not in communication w/ the OI or something.