Questions tagged [technic]

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

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37
votes
8answers
27k views

What are the best options for building a LEGO RC car?

I would like to build a remote controlled car. And if someone already has a good solution for that I would be glad to try it. It's been a while since I had the time and material to build some LEGO ...
2
votes
1answer
86 views

Motorizing Crocodile Locomotive set 10277 - are there any sets that include hub & motor I need?

Crocodile Locomotive can be powered up by using 1 x 88009 and 1 x 88013. Reviews on hubs and motors strongly suggest it is better, financially, to buy them as part of the sets, not separately. Is ...
14
votes
1answer
5k views

Is there difference between different colors of LEGO axles?

There are a few different colors of LEGO Technic axles, but not enough to really use for artistic variation - black, grey, some beige, and recently I have started seeing blue. The particular color ...
7
votes
1answer
145 views

Reinforcing a pair of Bent Double 11.5 Liftarms under Rotational Tension

I purchased a clone MOC out of interest a few months back, this following set. Because it does use clone pieces, I knew there was a high chance of breakage and poor fit, especially in the tensegrity ...
3
votes
1answer
111 views

Gearing problem

I have a technic MOC with lots of gears which runs fine when motorized with the Control+ L motor, the motor itself attached to the "dumb" battery box that would have been included with the ...
14
votes
2answers
559 views

Is it possible to dismantle and refurbish an original 870 Technic motor?

I have a couple of ancient 870 motors (the 4.5v ones) that run but don't sound great. I've looked for, but can't find, a guide on how to dismantle them. I'd like to either get in there and clean/...
18
votes
1answer
3k 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 ...
3
votes
1answer
293 views

Any cheap Technic sets with a good variety of parts?

I want to start building a module like GBC mini loop 001, but when I check the part list some are very hard to get. How should I get started? BTW, I got a very big set, Bucket Wheel Excavator 420555,...
0
votes
0answers
64 views

How to increase the voltage supplying to technic motor through the Technic hub?

I have four technic Large motor, all connected to a technic hub. I am using the motor to turn some large propellers and the hub is powered by six 1.5 V (maybe less) batteries. So each motor would get ...
5
votes
1answer
162 views

Control Lego Technic Control+ Hub via Python

Is it possible to control the Lego Technic Control+ Hub with Python? I have tried using Pybricks but that didn't work well for me.
4
votes
2answers
231 views

Motorized Excavator (8043) set alternatives

I'm on the search for a motorised excavator set and have the 8043 in mind. It is now retired and no longer available. Are there any alternative currently available sets? I have looked at a few options ...
12
votes
2answers
2k views

What are good books for building techniques of LEGO Technic

I've been searching for good resources for especially LEGO Technic. I find the Unofficial LEGO Technic Builder's Guide by Paweł “Sariel” Kmieć. The book is very good at explaining things. Beside that ...
3
votes
2answers
129 views

Most cost efficient length for pneumatic hoses?

As the title says, I would like to know what the most cost efficient length of pneumatic hose (including 99021s) is, assuming the average length of each piece is 12cm (4.7") and I can cut large ...
2
votes
2answers
2k 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 ...
12
votes
1answer
3k 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 ...
4
votes
1answer
139 views

How would one parametrically create a LEGO-compatible gear?

If a gear was intended to smoothly mesh with standard LEGO gears, how should it be defined? While I know that the mean diameter (average of inner and outer diameters) of a LEGO gear should be 1mm/...
3
votes
3answers
2k views

Why isn't the new LEGO CV joint available on Bricklink or Brickowl?

In the new 4x4 X-treme Off-Roader set 42099 there are 2 new, sturdier CV joint pieces that I would like to have. If I search for 42099 on Bricklink I don't see a list of pieces included in the set. I ...
13
votes
4answers
2k views

Has anyone created a analogue LEGO clock that runs time accurately?

I've seen someone on YouTube create a LEGO Clock with all the wheels and a pendulum, but I was wondering if there is any project or building instructions available to build such a clock with an ...
11
votes
3answers
3k views

How can a Mindstorms robot lift something very heavy?

I have a small LEGO Mindstorms robot and it needs to lift heavy objects, but it doesn't seem possible because the motor cannot bear the load. What methods or mechanisms can I use to make the robot ...
16
votes
3answers
1k views

Is there a way to remotely operate the push-button light brick?

The push-button light brick seems to be popular with Lego at the moment, and included in quite a few sets. I'd like to find a way of being able to operate it remotely, so that I can include the ...
4
votes
1answer
143 views

Interface A missing PCB

I have a Technic Interface A with the cables but lack the printed circuit board (PCB) for PC that I need to use it for automating my models. The card when it was for sale had markings of Lego 9771 and ...
8
votes
1answer
1k views

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 ...
4
votes
1answer
636 views

Can anyone identify these parts? Technic, liftarm connected to a circle

I'm trying to follow a video MOC tutorial but I can't figure out what this brick is. Part number would help.
7
votes
1answer
313 views

Any build instructions for vertical Technic/Lego conveyor belts?

I'm trying to figure out how to continuously lift a stream of incoming pieces up vertically, at least 10cm. This is my first real custom build attempt, so I'm very much at a loss on how to go about it....
21
votes
4answers
3k views

What tool can get the Technic pin out from a connection closed in the other end?

I'm having trouble removing these LEGO Technic pins apart from their connectors and I don't want to use carpenter tools like pliers which may damage the bricks. What tool can get the pieces separated ...
3
votes
0answers
179 views

Soft rear suspension on Landrover Defender too low [closed]

Can't answer this officially because I haven't enough points but the photos on the only other answer are of the front end, the problem I had on the rear was that the bottom shock absorber brown ...
3
votes
1answer
115 views

Volvo Articulated Hauler (42114) doesn't operate the bucket

I cannot get the rams to lift or lower the tipper body I suspect its something to do with the clutch mechanism since all the shafts and gears rotate freely until the clutch is connected. The white ...
4
votes
2answers
203 views

What 3D modelling services could I use to create custom LEGO pieces?

I want to create some custom LEGO Technic pieces, but I can't seem to find any software that is good at making it. I have tried using Blender, but it is hard to create holes. Do you have any ...
3
votes
1answer
159 views

Technic Rough Terrain Crane (42082) doesn't move

After first book, crane won't roll if pushed. If this normal. I know when you free soon one wheel, the other will go opposite direction, but when I try to spin all four in one direction, it locks. It ...
8
votes
1answer
2k views

Pre-Technic gears?

I have this set of LEGO gears. I remember seeing them first at my grandparents in the mid 80's. They predate my first Technic sets (~84 or 85). I have fond memories of my dad building a 3-speed ...
5
votes
1answer
879 views

I found these images of parts and want to find their part numbers

So I found this lot on the internet but don't trust the seller. What I want to do is find the part numbers of the pieces on the image and buy it from a reliable source. I tried to find it in multiple ...
1
vote
0answers
57 views

42082 Rough terrain crane [duplicate]

Crane can not be pushed forward or backward. It seems the front and back wheels want to move in different directions.I the rear wheels are lifted off the ground crane can be moved forward and backward ...
32
votes
5answers
12k views

Why does LEGO now use studless technic designs?

It seems to me that sometime between 1998 and 2006 (between the Mindstorms RCX and NXT), LEGO switched from using studded technic bricks (like this:) to studdless beams (like this): In my experience,...
2
votes
1answer
110 views

Lego bags missing sets

I have some Lego bags that I do not know which set they belong to. Can you guys help me?
6
votes
2answers
271 views

What's the purpose of brick 46835 (two wheels clutched into each other)

There is this strange wheel-like part consisting of two pieces snapping into each other and offering to insert axles from both sides, as shown in the first image. What is the purpose of this part ...
7
votes
1answer
4k views

Trouble with 42110 Land Rover Defender transmission

I just got the 42110 Land Rover Defender and assembled bags 1 and 2. I tested everything before joining the front axle and rear axle, and the friction was quite low, not nearly high enough to get ...
25
votes
1answer
4k views

How can I make a working pin tumbler lock?

I'd like to make a working pin tumbler lock out of LEGO bricks. I have already designed a key I'd like to use that should be compatible with five cylinder lock.
7
votes
5answers
3k views

What other uses are there for pull-back motors?

Sets 42010 and 42011 feature a pull-back motor. They have a very high torque for a very small numbers of turns, they then free-wheel. I'm trying to find alternate usage for them. That is anything but ...
4
votes
4answers
342 views

How do people build large collections of bricks?

How have people built up such large collections of bricks? I would like to get into building Lego Great Ball Contraption modules, but this needs a lot of parts to play with. I've got some Lego from (...
3
votes
1answer
215 views

Linear Actuator Clicking

I have just finished working on a mock-up landing gear deployment mechanism, keeping it as simple as possible of course. However one thing that I cannot seem to get rid of, is the small linear ...
1
vote
0answers
98 views

Technic 4x4 crawler questions

I have the Technic 4x4 Crawler 9398 fully assembled and in working order, but the rear U-Joint sheared itself in half during normal use. I have a replacement piece but now I can’t get the wheels to ...
7
votes
2answers
614 views

Connecting an axle to a stud on the ground for railings

I'm trying to build railing using axles and connectors and am not finding an easy way to get the axles that go to the ground to connect in a way that would be best for my design. Three options I've ...
4
votes
1answer
323 views

What is the Bluetooth PIN for the LEGO train PUP remote (88010)

I'd like to use the Powered Up train remote, #88010 as a simple controller (bang-bang only, obviously). It's Bluetooth, and it shows up as a device, but the PINs 0000 and 1234 don't appear to work. ...
12
votes
3answers
1k 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 ...
3
votes
2answers
412 views

What is the name of this almost triangular shaped 3x5 Technic beam?

Okay so, I've been on BrickOwl.com for the past day or two, trying to find the names of the pieces for a LEGO GLaDOS that this guy made because he doesn't give the names, at around 12:50 he uses this ...
6
votes
3answers
733 views

What are some good purist rotacaster / omni wheel designs?

In robotics, rotacasters or omni wheels are often very useful. It's possible to buy LEGO-compatible ones from some third parties, here's one random example: Unfortunately, LEGO has yet to make any ...
6
votes
1answer
459 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 ...
18
votes
7answers
7k views

How to unplug black friction pin connectors

Black friction pin without slots connectors are common in older Technic sets. Note that these were quickly replaced by the current version with slots that is much easier to remove. vs Especially ...
2
votes
0answers
105 views

Operating first time my 42082 set [closed]

I completed building the 42082 Rough Terrain Crane set and just found out that the boom does not work and the rear spread legs do not fold out, just the front ones.
11
votes
4answers
740 views

City scale connection for five-bladed helicopter rotors

I want to build a Super-Puma helicopter in city minifigure scale and form, I have the basic design planned, but I am not familiar with any five-sided technic connectors, which I will need for the ...

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