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1500 questions
8
votes
2 answers
Will the LEGO MINDSTORMS EV3 software run on macOS 10.15 Catalina
I'm currently running macOS 10.14 Mojave and I see this warning when I start the EV3 programming software:
Will it stop working if I upgrade to Catalina?
Is there an alternative?
David Lechner
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8
votes
1 answer
LEGO 42095 wheels going opposite directions
My son just finished the 42095 Remote-Controlled Stunt Racer and the two wheels go in opposite directions. Have checked and rebuilt and still can’t get it running in the same direction. Can anyone help?
Bree Mills
- 81
- 2
8
votes
1 answer
Adapting charger for NXT 9798 battery
I have an old style 9798 NXT rechargeable battery pack 7.2V 1400MnAh, but no charger.
Can I adapt a spare non lego 9v 200mAh charger for this? Or is voltage too high? can anyone read the output voltage from their old charger?
As I will need to…
Zarnx
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- 3
8
votes
1 answer
Can the RCX connect to infra-red on a computer?
Can the RCX connect to a laptop with a IR reciver on it? I want to program my RCX on my computer, But i have no db9 (Lego RCX connecter for 1.0 tower) seriel connecter nor a converter.
zaabtoop
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- 5
8
votes
2 answers
Has the building technique of Technic pins in a brick cylinder been used in an official set?
One of my favorite building techniques is to place a Technic pin into the anti-studs of a brick. This allows two bricks to attach bottom-to-bottom.
It's a pretty secure connection, but I'm not sure it was intended to be used this way. Has this…
Magnus
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8
votes
2 answers
Why do Star Wars sets include the Disney logo/brand name while Marvel Super Heroes sets do not?
I have noticed that LEGO sets from the past few years of their Star Wars theme include a prominent, or at least noticeable, Disney logo, typically in one of the corners. For example, see this Imperial AT Hauler set, with the trademark…
Robert Columbia
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- 26
8
votes
2 answers
Read power usage and respond when motor is straining
Is there a way to know if the drive wheels are "straining", like when locked up with an opposing bot?
This is for a Lego sumo bot using the Lego Mindstorms Education EV3 Core Set (EV3 Large Motor 6009430 and Lego Mindstorms EV3 Home Edition).
The…
efreed
- 195
- 5
8
votes
3 answers
How tall is the Saturn V set in LEGO units (studs, bricks etc.)?
I'm building a MOC to scale with the Saturn V set and am having trouble figuring out how tall the 1st stage engines are but the entire thing would be really helpful! Thanks!
th4t gi
- 83
- 3
8
votes
1 answer
Mindstorms 2.0 can't download to NXT brick with error 142023
Using Mindstorms education 2.0 on a Windows 7 computer I can't seem to get the program to see the NXT via USB or bluetooth dongle.
When connected by USB nothing appears in the NXT window with device turned on. When downloading a program, error…
jr martin
- 81
- 1
- 2
8
votes
1 answer
Replacement power cable for Mindstorms RCX
I have an old Mindstorms 1.5 RCX.
The plastic on the power cables has degraded, and they short out and don't work well.
These look like they would work as replacements, but I'm not exactly sure. I contacted the seller but they didn't respond.
Will…
Brock Henry
- 81
- 2
8
votes
1 answer
Are these old car models legit sets or MOCs?
Are these 4 historic car models legit sets or MOCs? If official sets do you know the set numbers?
How can I add more pictures then one?
fabian
- 1,285
- 2
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- 16
8
votes
1 answer
Is this non-disassemblable LEGO instruction step real?
I've seen this image shared a few times around the internet as an example of a LEGO instruction step that assembles pieces in such a way that they cannot be disassembled (at-least not without some serious strain on the parts).
If one were to insert…
Alexander O'Mara
- 13,302
- 4
- 43
- 97
8
votes
2 answers
Capture video stream from LEGO Studio Camera (Logitech USB webcam) in ev3dev?
Once upon a time, LEGO made a digital camera for the LEGO Studios and Mindstorms line. Internally it's an old USB Logitech camera repackaged in a LEGO housing.
It could also be used with the old LEGO Mindstorms software, to do some very weak video…
Alexander O'Mara
- 13,302
- 4
- 43
- 97
8
votes
1 answer
What came first? Print or sticker?
Recently I learned that there seems to be no strategy in the LEGO design about when to use stickers and when to use prints in a given set. My question is what LEGO used first to decorate bricks: Prints or stickers?
First I thought, it must have…
Metalbeard
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- 2
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- 39
8
votes
2 answers
Smallest rubber wheel that can be turned by a technic axle
What the smallest rubber wheels that can be turned by a Technic axle?
This is what I have so far
Wheel Full Rubber Balloon with Axle hole #4288
Background: I'm building a GBC and I want to push the balls at speed across an open area. I plan to hide…
Craig
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