Questions tagged [technic]

A more advanced form of LEGO®, allowing for the creation of more realistic working parts.

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2
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1answer
208 views

how deep can the axle go in the Power up L motor

I am trying to make a MOC but I can't decide how long the axle could be so it can go fully into the motor but not extending out of the other side. Could you tell me how long the axle can go in?
5
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2answers
195 views

How much energy do LEGO Technic gears lose to friction?

So, I recently watched a video by the Brick Experiment Channel about building a 1 Googol:1 reduction gearbox, which at the time of writing this question, is at #44 on Youtube Trending. At the end of ...
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1answer
60 views

Is the Technic hub putting the battery in series or parallel

Can anyone tell me how the battery in the Technic Hub is connected? Are they connecting the batteries in series or parallel? It is the hub that powers the motors, right? If all 6 AA batteries are ...
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2answers
1k views

Why do gray axles appear black and black axles appear white and black in this manual?

I've been looking through the parts of an old manual I have and I noticed the odd-length gray axles appear black and the even-length black axles appear white and black. Is this just an artifact of ...
10
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1answer
4k views

9398 4x4 Crawler front wheels rotate in the opposite direction to the rear wheel

We've just finished 9398 4x4 Crawler. Everything looks good, the motors work but the front wheels rotate in the opposite direction to the rear wheels, they also turn in opposite directions. What could ...
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2answers
1k views

Advice on Power Functions for an 11-year-old?

My 11-year old son wants to add power to his creations but neither of us know quite how to start this new adventure. He doesn't have any Technic or Mindstorms sets. Looking through sets online, it ...
9
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3answers
3k views

Alternative to LEGO CONTROL+ app

My son just received the Liebherr R 9800 excavator 42100 LEGO set. It would seem the Control+ app that is recommended for it simply won't work. It doesn't even connect to the blocks. What are the ...
12
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1answer
2k views

How much current do the LEGO motors draw?

I'm building a project with Raspberry Pi and some other electronics driving the LEGO Power Functions M-Motor (8883) and I need to know how much current those motors draw under load. Has anyone done ...
1
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1answer
96 views

Lego technic 42082 4 wheel steering issue

I have just completed the build and everything appears to work as it should except the 4 wheel steering. When you turn the small wheel on the rear of the crane only the rear wheels steer. The front ...
3
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4answers
492 views

How to prevent my connected axles from falling apart?

In my EV3 robot, I have two rear axles connected to each other using this part mounted like this: [ The problem with this construction is that after a while of driving, the axles disconnect like ...
2
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2answers
202 views

How can I make my LEGO engine go faster

I have a LEGO engine powered by a PF XL motor but I didn't realize until now that the motor is not that fast and that even when I increase gear ratio the gears always get either unattached or jammed. ...
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2answers
5k views

If I were to make a LEGO fan how would I make it blow air on me?

I was just wandering off into my imagination and then it hit me: I should make a LEGO fan? I mean, how hard could it be? It is actually very hard for me. No matter how much ratio I put on it, it ...
4
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2answers
766 views

Can you help me identify this part?

After a lot of circus and calisthenics with a magnifying glass and lamp, I'm still unable to read the part number. I've also clicked thru' about 180 pages of LEGO 'Pick a Brick' and didn't find it ...
2
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1answer
260 views

Can Lego Remote Control 88010 control Lego Technic Hub 88012?

I have been exploring the new Bluetooth Technic smart hubs with the Control+ app and PoweredUp app. I would like to also use a physical remote. I have the Technic smart hubs that come with the ...
11
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2answers
783 views

Technic Pin/Travis Brick Legal Connection?

Is seating a Travis brick on a Technic pin a legal connection? TLG has used this construction at least once (M-Tron Particular Ionizer's "rotor"), but that was in the early 90s. Will this connection ...
6
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1answer
663 views

How exactly does the pull-back motor (12787) work?

I've got the 42034 Quad for my birthday and it's been really fun to play with technic after so many years. I am very curious about one thing, though - how does the pull-back motor (12787) work and ...
6
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2answers
197 views

Any (small) Lego Technic parts not in whole units?

This is aimed at building a GBC module, not to reproduce an actual engine. I need a piston type construction with stroke length of 3 units, which means a crankshaft radius of 1 1/2 units. Are there ...
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1answer
69 views

Bionicle generation 3 [closed]

Hey LEGO will you make another Bionicle reboot? If you are is it going to be a bit more like g1 but also bring back a few g2 characters and I hope it is either ccbs, you bring it back or technic like ...
2
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1answer
103 views

Winch with String

I'm considering buying a few winch's with string. I don't understand what I need to make it turn. It doesn't look like a regular technix axle goes inside it right? I've looked at a few of the ...
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2answers
7k views

List of Lego Technic sets with remote controller?

I am interested in buying a set with motors (etc) with a remote controller. Is there a website that allows to search with this conditions? Official website is pretty bad. I have found the Lego ...
17
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1answer
2k views

Which old Technic set included large yellow motor?

I am trying to find the number or some other identity of a Technic set I remember owning as a child (so it was probably bought in the 1985-1995 year range, more likely in the 80's half of it). Among ...
10
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1answer
1k views

How can I make church bells with a pull cord?

I would like to allow the viewer to pull on some strings or chains and let that ring my church bells (I know it won't make much sound, that's fine). I'm thinking I'll need a pulley and some string, ...
2
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1answer
223 views

How to make a Lego continuous conveyor belt

So I need to make a continuously working conveyor belt transporting blocks. I have seen this post, but additionally, as already said, I have to make it work continuously transporting blocks,so I have ...
3
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1answer
158 views

Which pieces were used to make the flexible mesh skin for the life size Lego Bugatti?

In the linked video, around the 1:50 - 1:55 mark, a person can be seen picking up a flexible hexagonal mesh, and bringing it to the side of the vehicle. Also, close ups are visible around 2:03 - 2:37. ...
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0answers
71 views

Front driveshafts on landrover defender don't stay in place

The front driveshafts on my Land Rover Defender keep falling out, then the cogs fall out of the front differential. I have done them three times as per the manual, but every time I get the same result....
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2answers
154 views

What exactly does each Mindstorms part do?

It's been a few years since I've bought a Lego Mindstorms NXT 2.0 which comes with the Technic style pieces. There's beams, axles, rods, connectors... but the majority of the times when I'm building ...
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2answers
3k views

How to build a limited slip differential?

Lego provides a couple of ways for building a differential, such as this: and also provides a limited-slip gear like this: http://www.brickowl.com/catalog/lego-technic-differential-with-one-gear-28-...
4
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1answer
110 views

Bugatti Chiron - loose connection to wheels

I’m currently building this set and I notice that the connection to the front wheels often falls out. This is the small red line between the wheel and ball joint. It depends on the angle. It is ...
2
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0answers
61 views

How to get Lego Mindstorms EV3 expansion set (45560) programmes in Scratch

I bought recently Mindstorms EV3 expansion set (45560) and found out that the available programs are written in old LabView-style programming language: https://le-www-live-s.legocdn.com/sc/media/files/...
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1answer
2k views

Realistic Lego car sets containing gearboxes and engines?

Lego Technic 853/956 Auto Chassis contains a car chassis, complete with a transmission gearbox. Other sets like Lego Technic 858/8858 Auto Engines contain parts to build working models of real-life ...
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3answers
636 views

Does a 1x3 Lego technic liftarm with two round holes and one axle socket exist? (for tank suspension usage)

I have been searching for some time for parts like these (with no success): But with two holes (instead of three) and one socket for Lego axles at one side. Likewise two holes (instead of one) and ...
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1answer
95 views

Transparent Technic elements

I know these Technic liftarms come in clear transparent: https://www.bricklink.com/v2/catalog/catalogitem.page?P=32278#T=S&C=12 https://www.bricklink.com/v2/catalog/catalogitem.page?P=32009#T=S&...
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2answers
198 views

Part differences between main and alternate models of 8285 set

Someone is selling the alternate model of the 8285 set But I'm really more interested in the main model of that set. Does anyone know how many bricks I'm going to be missing when only the bricks ...
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1answer
81 views

What set did this Technic container come from?

This box has a lot of Technic LEGO pieces but I don't know which set this is from. The box is small, violet.
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2answers
7k views

Adding Power Functions to LEGO Mack Anthem Truck (42078)

Does anyone have experience adding Power Functions to set #42078 LEGO Mack Anthem truck? It’s a Technic set, but only features manually actuated functions. I have seen it motorized on YouTube, ...
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3answers
1k views

Clip a wall to a 6 or 7L pole

I'm planning on making a wall 6 bricks tall. The wall will have some vertical clips coming out to clip to a vertical pole. Unfortunately, the only 6 or 7 length bars appear to have the little stopper ...
15
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1answer
5k views

What are the angles used in angle connectors and liftarms?

LEGO makes Technic Angle Connectors, like these: (Here are names and part numbers). They also make angular liftarms, like these: (part 32348). That last part has an angle of 53.5 degrees. What ...
5
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2answers
388 views

How to locate pneumatic leak

I have a simple pneumatic claw with a 2 pump compressor that I built somewhat recently. It worked fine for a while, producing up to 4 bars of pressure, but then the system wouldn't increase the ...
3
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1answer
327 views

Issues with my LEGO Land Rover Defender - Rear Wheel Keeps Popping Off

I just finished the assembly of the Land Rover Defender Technic model and it appears I have trouble in the rear... the rear left tire keeps popping off every time I try to roll forward. It is secure, ...
14
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2answers
7k views

Is a N2 or CO2 paintball tank a viable power source for a LEGO pneumatic Engine?

I would like to know how a LEGO pneumatic engine would perform when powered with a nitro (N2, HPA) or CO2 tank. I have seen a few RC cars powered with air (from soda bottles), so I am wondering if it ...
6
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1answer
1k views

Issues with my LEGO Land Rover Defender - Low rear

Just built the 42110 LEGO Land Rover Defender and found the rear of the car sitting very low on its base and the rear wheels almost touching the wheel arches. This is very low compared to the front ...
2
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2answers
275 views

Problem With Bionicle Joint Sockets Cracking, Repair Options?

I'm pretty sure that serious Bionicle fans have all dealt with cracking of the joint socket pieces. However, is super-gluing the broken parts a solution? I'm worried that the joint socket won't be ...
6
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2answers
135 views

Overview on how to use special Technic parts?

I just came out of my "Dark Age" inspired by my kids growing up and getting more and more out of Duplo and into Lego. I bought a mixed lot of Technic parts and man, there are a lot of new parts! So ...
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2answers
3k views

Is this a real Technic cloak?

I found a cloak piece in some used LEGO I bought from a former LEGO employee. The cloak does not say LEGO on it, but it fits perfectly onto Technic figures with a satisfying pop and matches the ...
4
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2answers
351 views

Which parts have no-friction Technic axle holes?

I want to make a no (or very low) friction inline coupling for axles. The axles must turn, transmit moderate torque, and be in phase (therefore backlash must be minimal). The axles remain inline at ...
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1answer
228 views

How to motorize a LEGO Pneumatic valve?

I am working on a project that requires remotely switched LEGO valves, and I tried many designs I found, and none of them worked due to the valve causing too much resistance. Does anyone have a ...
7
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1answer
196 views

Harley Davidson chain belt running jolty

I am building the Harley Davidson Fat Boy from Creator Expert (10269) and when installing the chain belt that connects the engine gears to the rear wheel I noticed that it runs quite jolty, with the ...
6
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1answer
221 views

LEGO Technic #42082 - Rough Terrain Crane: Loose Feet

LEGO Technic crane set #42082. Putting the feet on now, are they supposed to click in somehow? Also, my feet don’t seem to touch the ground. I’m worried I messed up somewhere a long time ago. Help ...
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2answers
428 views

All-purpose Technic set?

For LEGO Classic there are plenty of "build anything" kinds of sets, but is there something like that for Technic? Ideally, I'm imagining a box of the most useful 1000 or so Technic pieces, so that ...
2
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2answers
288 views

Looking for a way to connect SG90 servo motor to Lego Technic hole in a brick, in order to control Lego train tack switch

After looking at this question: Can I remotly control the points on PF train tracks? I got the idea of controlling the train track switch handle using a servo motor that will be able to move the ...

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