Philo
  • Member for 10 years, 1 month
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What are good books for building techniques of LEGO Technic
Accepted answer
12 votes

In addition to Sariel's excellent book, I'd suggest Yoshihito Isogawa's "Tora no Maki" (Book of secrets) downloadable PDF book, and his Ideas books in print. All are full of clever ...

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What adhesive can bond LEGO bricks to metal?
13 votes

Have you considered screwing your decorations to the metal stand, using Technic brick holes to pass the screws? If done properly no harm is done to the bricks, and you will not fear a bad glue joint!

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Is it possible to build Lego bricks with a makerbot replicator 3D print?
8 votes

LDview can directly export LDraw files to .STL. But the problem is that the mesh obtained may not be suitable for 3D printing, many of LDraw parts are not "watertight", or contain surfaces inside the ...

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How to make a regular pentagon from technic bricks
4 votes

A solution, using a (quite precise) approximation: Granted, it's a bit bulky, but it could be reduced by half using 7.5 stud long stiffeners (eg. using Technic brick 1+ Technic brick 8 +plates) Link ...

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What are all the third party (unofficial) accessories I can get for an NXT
Accepted answer
13 votes

There are MANY companies that offer third party stuff for NXT: Mindsensors, already mentionned in pcantin's answer Vision Subsystem - Capable of tracking up to 8 coloured objects Touch Panel Numeric ...

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Does the Mindstorms RCX Input Ports have a Pull-Down Resistor?
3 votes

The RCX input port has a pull-up resistor, not a pull-down (so it reads high: 1024 in raw mode). You can see reverse engineered I/O port electronics here: http://www.brickshelf.com/cgi-bin/gallery.cgi?...

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Lego RCX 1.0 brick relationship to Robotics Invention System (RIS) & RCX firmware versions
1 votes

There is no significant hardware difference (*) affecting software between the RCX bricks, so 1.0 brick is compatible with all firmware and RIS versions. (*) Known hardware differences: RCX 1.0 ...

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Where can I obtain the software called “Instructor”?
Accepted answer
1 votes

An older version (1.4) of Instructor is advertised in this forum post and can be downloaded here. As you can see on the Google+ post, the differences between 1.4 and 1.6 are mostly cosmetic.

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Can you identify this model of a yellow truck?
Accepted answer
6 votes

This model is built from set 8062-1: Universal Set with Storage Case. Inventory and building instructions are available here.

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LDD Seems to be missing a piece
4 votes

18677 IS in latest LDD update (mid march 2016), issued after announcement of LDD end of support... Just make sure to be in LDD Extended mode to find it, along with other plates.

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Where are the 2 by 2 turntables in LDD?
3 votes

You'll find them in the hinge parts category (next to minifig one) under the name "Turn Plate 2x2", number 3679 / 3680. Brickset uses LEGO names for parts, this can help finding them in LDD

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How many pneumatic actuators does one air tank support
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5 votes

An air tank (at least LEGO low capacity ones) are not meant to directly supply actuators. Their main purpose is to smooth out the pressure of air flow produced by a pump (manual or motorized).

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RCX 2.0 Firmware downloaded successfully but "Run" does nothing
1 votes

Could be the button indeed. These buttons are conductive rubber pressing on the circuit boards integrated contacts. Might need some cleaning there... Disassembly of the RCX is not easy but can be ...

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Can the rcx work without the infrared tower
2 votes

No you can't. But IR towers are pretty cheap, especially the older serial ones (you have to add an USB to serial converter to use the latter version on modern computers)

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Is it possible to use DUPLO bricks in LDD?
6 votes

LDD is a closed world where people can't add its own parts. If you want to create Duplo building instructions you should use LDraw that has many Duplo parts in its library, and allows you to create ...

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How to import an unofficial parts archive into LDraw?
2 votes

You have no need to use these unofficial parts, all EV3 parts (except for the stickers) are now LDraw official parts, and should already be in your library if it is up to date (otherwise, download and ...

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LEGO RCX hardware schematic
2 votes

There are partial reverse engineered schematics done by Mark Bellis here

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Why is my LDD model incomplete after I export it to LDraw?
8 votes

This in not a LDView problem, but a conversion issue between LDD and LDraw. Only parts present in both libraries will be displayed. Moreover, the file (ldraw.xml) that defines the correspondance ...

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How to control a 88004 Servo Motor with a Raspberry Pi?
Accepted answer
9 votes

LEGO "Servo Motor" has little to do with a RC servomotor. To drive it, you need to: Power it at 9V (probably works at 5 volts, but with less torque) through PWR/GND terminals To move in one direction,...

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City scale connection for five-bladed helicopter rotors
Accepted answer
10 votes

5-fold symmetries are difficult to build in LEGO, especially at small scale. Here is an attempt, still a bit bulky... LDraw file here.

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How can I wire up the LEGO 2838?
4 votes

To wire 2838 motor, you have to use one PF extension cable, one end connected to PF power source (either battery box or IR receiver), the other end has a 9V compatible plug on bottom. Unfortunately, ...

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Unlimited engine option does not work
3 votes

You need to ensure that your program has a way to stay alive (wait block, wait for sensor, etc...), otherwise as soon as the program ends all motors are stopped.

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Faulty NXT Motor
2 votes

I agree with HaydenStudios, it is impossible to disassemble completely NXT motor without breaking the orange axle hub. You can nonetheless half-open it enough to see what's happening inside (you need ...

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Where can I find LDraw examples?
Accepted answer
5 votes

The models included in AIOI as mentionned by HaydenStudios is also available as separate download There is also a huge collection of LDraw models of official sets available on Eurobricks forum

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What is the difference between the NXT 1.0 controller and the NXT 2.0 controller?
Accepted answer
13 votes

There are a few subtle differences in internal hardware between the NXT 1.0 and 2.0 bricks. The most notable one is that the 1.0's screen would give out over time due to stress being put on a ...

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NXT or EV3 gyro sensor
Accepted answer
4 votes

LEGO doesn't make a gyro sensor for NXT, but Hitechnic sells a gyro third party product and Mindsensors has a combo gyro/accelerometer/compass (IMU). Both can be used with EV3, and LEGO also has a ...

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Holonomic robots using Mindstorms
2 votes

There is an excellent model at Hitechnic, complete with building instructions and example programs. It's for NXT, but shouldn't be very hard to adapt to EV3.

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EV3 IR Beacon/Remote Programmability
Accepted answer
0 votes

No, the EV3 IR remote (which uses the same protocol as Power Functions remote) is not programmable. The simplest way of doing your timelapse photography is to press the button of your camera remote ...

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Is it possible to create a differential if I don't have it as a ready to use element?
1 votes

The delicate problem in a brick-built differential is to create the frame. It must have a gear to drive the differential and this gear must let the axle rotate freely. Without parts modification, the ...

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Logging and performing mathmatical calc. during run?
4 votes

Instead of using the datalog block from education version, you can create a custom version using the file access block. It's a bit more difficult, but more flexible... You won't be able to directly ...

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