Lights for vision target
 

We (the team) are trying to get an LED light onto or near the camera, in order to illuminate the vision target: Some questions:

• What brightness level should the light be to illuminate the target without washing out (right term?) the image?
• How would we wire the light onto the robot?

Re: Lights for vision target
 

1. Not very bright at all would be plenty. Think small flashlight, not 747 landing lights. Try a Radio Shack yellow LED, as long as it's mounted right at the camera, the retro-reflective tape will live up to its name.

2. I suggest using a spike, but there are other legal methods. Using the Pneumatic Solenoid bumper is NOT a legal method. The Digital Sidecar might not have sufficient current available to drive even a small LED.

Re: Lights for vision target
 

We're currently using four red LEDs around the camera lens, each at roughly 3 candela. It is subject to change, yet, depending on what the programmers decide they need, but my understanding is that it's working relatively well so far

Re: Lights for vision target
 

Using the Pneumatic Solenoid bumper IS a legal method as of update 8.

As others have said, don't use too bright a light, unless you want to blind your alliance drivers.

Re: Lights for vision target
 

Er, what part of the Robot Manual dictates which methods can be used?

Also, can I get a measurement of how bright it should be?

Re: Lights for vision target
 

That is incorrect.

<R42> that was changed in update 8 refers to Spike relay modules, not solenoid modules. <R60> still says exactly what can connect to solenoid modules:

Re: Lights for vision target
 

I assume you're talking about the modification to <R42> in team update 8? No where in the rules, FIRST documentation, or NI documentation is the solenoid breakout module or digital sourcing module referred to as a relay. I believe <R42> refers to a spike relay only and not the solenoid breakout, so it is not legal to hook a light up to the solenoid breakout.

Re: Lights for vision target
 

Thanks for correcting me!

It seemed reasonable to me to have a low-current light on an output where you can draw up to 3A. Re-reading R42, the intent is actually to allow multiple lights, or multiple solenoids, to be powered in parallel by a Spike relay.

Re: Lights for vision target
 

Okay then, use a Spike relay to connect the LED to the robot.

Are there any other methods available?

Re: Lights for vision target
 

If you're into making electronics, you can make a "custom circuit" and hook it up to a digital output.

Re: Lights for vision target
 

Wicked,
Remember that the light will be too bright when you or your alliance cannot see the field with the light shining in their eyes.
Does not everyone know that the camera can be adjusted for varying light levels?

Re: Lights for vision target
 

I think we'll stick with the Spike relay. :cool:

Last question: what specific brightness range should the light be in?

Re: Lights for vision target
 

Someone pointed out to me the other day that the blue plastic housing associated with the Solenoid Breakout actually is prominently marked "RELAY". However, that's the only place I know of where that word is used for that module.