Lego Compatible Servo
Has anyone tried this before? I was hoping I could plug it into the boe-bot's P14 and 15 pins and do some fun activities with my class.
Thanks,
Diane
https://www.browndoggadgets.com/products/lego-compatible-360-degree-servo
Thanks,
Diane
https://www.browndoggadgets.com/products/lego-compatible-360-degree-servo
Comments
Speaking for myself, not yet.
Sometime last year I was working out the details to, ah, reproduce the basic BOE bot design using LEGO, both wheels, and a platform.
But making the design work proved difficult.
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Erco, why are there two mountain lions examining your car?
And why did a crowd of robots land on an island in Puget Sound?
And if it works, they'll also include first photos of the bot.
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Mascot away.
Another curious find on that site is a uC board that has LEGO-size holes on the PCB, along with "conductive Maker tape". There's a chance that may actually be more difficult than using plain old wires, but I do like the thinking. At a glance, it LOOKS modular. https://www.browndoggadgets.com/collections/new-crazy-circuits-chips/products/crazy-circuits-robotics-board
A simple BoE-style breadboard is pretty flexible. Seems like a LEGO-based construction system with a modular breadboard system (done properly) could be successful.
There's an Australian (maybe Kiwi) LEGO-compatible orange robot chassis called Edison which already has a sizeable educational following in schools. https://www.amazon.com/Contempo-Views-Edison-Robot-2-0/dp/B01HSFMK6G
I use Edison robots in my 5th/6th grade class. It's a good intro product, but its limitations are frustrating. The kids really like it.
Well both of mine arrived today, five days late as it happens. It turns out they resemble a pair of regular servos that I obtained from when RS was collapsing. [Think of the box of intended things to be used with the other platform that's also supported by the Shield Bot that's sometimes intended to enable the builder to try out ideas before committing to a final design on that platform.] @erco you suggested that they resembled 9g servos, well so are those.
When the two arrived, I checked to see if they were a good fit for the wheels I had in mind. They were not. So these two are now being used, or will be used, for, ah, model management.
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Oh wow. Erco there's a soggy mountain lion looking through your garage for a towel.
Update!
I have both of mine plugged into one of the BOE boards, and they are wearing construction wheels and improvised Lego axles. Running the program for running a CR servo:
' RotateParallaxCrServo.bs2
' {$STAMP BS2}
' {$PBASIC 2.5}
counter VAR Word
servoPin PIN 14 ' change I/O pin for servo signal here
FOR counter = 1 TO 100 ' Rotate counterclockwise for ~3 seconds
PULSOUT servoPin, 850
PAUSE 20
NEXT
FOR counter = 1 TO 100 ' Hold still for ~3 seconds
PULSOUT servoPin, 750
PAUSE 20
NEXT
FOR counter = 1 TO 100 ' Rotate clockwise for ~3 seconds
PULSOUT servoPin, 650
PAUSE 20
NEXT
END
Currently it is showing P14, which was the last test. I basically saw the wheel turn. I'm going to build that Board of Ed Bot out of Lego.
Mascot is away.
Erco if you're monitoring this thread, the mountain lions left.
And worse luck it did not work. These servos can not be used to spin wheels attached. These servos could be used for spinning and pulling around Lego models, but not robotry.
For those we'd need to figure out how to adapt the real ones.
It's even worse because it seems the dots/holes that ARE on the servo don't actually mesh with Lego bricks. Maybe the sourced servos were meant to mesh with a 'Chinese Lego' system or something. However, mounting the servos with PIN connections, works perfectly. And PIN connections are superior to stacked connections anyways.
I'm having an absolute blast with my servos. They enabled me to combine two toys into one (R/C and legos)
Hello!
I beg your pardon? When I worked on my last activity, I found that I was able to snap the servos I chose onto blocks. And when they first arrived I was able to attach them onto different blocks in various positions. Incidentally the company name is capitalized, as Lego. And is its own plural word, Lego becomes Lego when talking about a heck of a lot of them.
Now as for their interesting ideas of the "maker tape" stuff, and their breadboard on Lego ideas, that's next. I'll probably include a Parallax designed controller into the mix.
I stand corrected. I was trying to stack them up the wrong way LOL
We are using the servos to make 'Lego Battlebots'. The torque and speed of the continuous rotation servo is adequate for creations of typical Lego size. The torque of the regular servo is adequate as well.
We are running continuous rotation servos through a gear train before it gets to the drive wheel. I assume others are correct that the servo alone cannot support a drive wheel axle.
No offense to BOE bot, but I can't imagine it doing anything close to what a homemade Lego creation that fits into the palms of your hand can do. I mean we are doing 4WD, differentials, conventional steering, tank steering, weapon systems, cameras etc. For a $100 you can buy a decent amount of Mechanic Legos on ebay, and get just parts you actually would want
Lego Battlebots showing strength of the Lego compatible micro servos.
Maybe my transmitters outputs need to be scaled (ie transmitter needs programmed) and the servos would be stronger perhaps