pcantin
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Quick way to inventory parts
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8 votes

As you have probably guessed by now, there is no easy solution to your question. It all comes down to computer vision. In this solution, Akiyuki built a massive machine out of LEGO bricks, a camera, ...

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Is it possible to use Bluetooth to connect two EV3 bricks using RobotC?
2 votes

According to the online documentation, Bluetooth commands are supported for NXT but not for EV3. On the other hand RobotC is supporting Bluetooth upload/debugging. This means that it is accessible. ...

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How make robot turning going straight?
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2 votes

The main problems I see are the following: The value in the numRight variable is wrong for two reason: The 'right' sensor is not reseted at the proper time and you read the 'left' sensor value ...

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EV3 bluetooth controller for mac
1 votes

You could try the MonoBrick Communication Library. It is supported for Mac OS and does use Bluetooth as a way of communicating with the EV3 brick. MonoBrick was listed by IntroRobotics with three ...

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How to use two NXT bricks for 3+ motors and 4+ sensors?
2 votes

Maybe you should look into using a multiplexer to add additional sensors to an NXT brick. The Hitechnic Sensor Multiplexer lets you connect 4 sensors using only 1 of the NXT connection. The same ...

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How to remember initial position of a robot and return to it
2 votes

You should look up 'Dead Reckoning'. It is a method where you always know (or guess) your current position by tracking all your previous moves. Knowing your current position, you can then retrace ...

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What is the purpose of the Technic Axle 6 in set 6847?
8 votes

When weight is applied on the structure, the wheels are are creating a twisting motion that will eventually dissasemble the 1x6 beams. With the extra structural part when a load is applied there is a ...

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How to make a conveyor belt with LEGO parts?
7 votes

In this great GBC machine built akiyuki, you can see 2 types of conveyor belts. The first one is made of the small tread links (3873). The second and third ones are made with the large tread links (...

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What material is used to make capes and cloth in LEGO sets and where do I get it?
8 votes

The term acrylic is used for many mediums, like acrylic paint (liquid), acrylic fiber (clothing), acrylic rubber (flexible) and acrylic glass (really hard). So, as you see, it is possible to make ...

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How much usage can a LEGO piece take before it loses its 'clutch power'?
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258 votes

37,112 times Well I did it. I built a machine to test this. It took 10 days until the LEGO at the bottom couldn't stay on anymore. >>> Check my blog for more details

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What colors does the NXT Color Sensor support?
Accepted answer
4 votes

It depends on which version you're talking about. NXT 1.0 Light Sensor: This sensor should detect up to 100 shades from white(100) to black(0). NXT compatible Hitechnic Color Sensor: This sensor ...

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What is the male:female ratio of gendered minifigures?
1 votes

Based on this great info-graphic data, the male to female ratio is at 18:1

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Displaying the Star Wars Super Star Destroyer in a small apartment?
14 votes

By using two TV wall mounts, you could put it against the wall on its side. This guy was able to do with the LEGO Millennium Falcon(Ultimate Collector 10179). Here's a link to some pictures that ...

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Useful machines built with LEGO
26 votes

Here are some examples that caught my attention in the last years: Cambridge scientists are using LEGO Mindstorms in their lab instead of a professional robot, saving them large amounts of money. The ...

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How can I motorize City-scale wheels?
11 votes

Ever since this question was asked I wanted to build something that would fit that scale. Here's the result: I know this is not using only LEGO pieces but, I thought that there was no way to make ...

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Gunner bot programing
6 votes

Your code handling the behaviours like "Shoot 3 times if the touch sensor is triggered" or "Shoot if the light sensor is triggered" should use 'if' statements. Then, instead of always being called, ...

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RobotC for RCX cannot find USB IR Tower
2 votes

If you are you using ROBOTC 2 for RCX you need to install the separate driver for windows 32bit. This driver is not included in the ROBOTC install (at least not with version 2.03). It might also be ...

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Fix for monorail sticking at monoswitch?
Accepted answer
5 votes

Maybe the plastic is worn off just enough that the switch is not pushing the pins completely anymore. Debug step 1: When the train pins are in the switch zone there shouldn't be a lot of space ...

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Will playing with a PF train motor by hand damage it?
Accepted answer
16 votes

Unless you do extreme things it should be fine. All the gears insides the Train motors, Power Function motors and the NXT motors are made of Nylon while the pinion attached to the motor is made of ...

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Serial tower stopped communicating with RCX 1.0
3 votes

You could try with NQC. By default it supports the Serial Tower and you can specify if you are using a USB Tower with -Susb . It works on Windows, Linux and Mac. The man page (documentation) can be ...

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Alternative controller for LEGO NXT
Accepted answer
5 votes

I would suggest Arduino or, preferably, Raspberry Pi. Here's some info extracted from my previous answer on NXT: Arduino & Raspberry Pi are flexible development platforms and they can easily be ...

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Are there more studs or "antistuds"?
8 votes

It seems like the studs have an advantage and here's two reasons why: 1) The base plates have only studs and no antistuds. So many base plates were made that this is stacking the numbers in favor of ...

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Is there a documented process in 'Jamming' an NXT Ultrasonic sensor?
3 votes

Since everything is fair in love and war, you could do this: Using an Arduino and this NXT compatible shield, you could program it to send a continuous burst at 11494,253Hz creating noise in the ...

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Apart from the LEGO brick, is there any other hardware that has an NXT firmware written for it?
5 votes

LEGO itself does not make specific firmware/software to support other devices other than the official NXT brick but... ...you can still use Arduino and Raspberry Pi (and more) with the NXT components ...

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Help Installing NXT-G On Mac 10.6.x
1 votes

The drivers are probably not installed correctly. You have to run the legodriver.pkg (by double-clicking on it) which you can find in the 'Parts' folder. You should use this detailed list of steps (...

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Tools to aid in getting parts from tight spots?
11 votes

I use a simple reverse tape at the end of a stick

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Waterproofing LEGO bricks
12 votes

I would try liquid latex (liquid frisket) which you can buy in most art supply store. This will not damage the bricks and is easy to peel off. You can apply it using a cheap throwaway brush, either ...

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How can I make a Lego heroica scale gladiator arena?
5 votes

Let's assume that the Heroica figures are exactly half the scale of the normal LEGO minifigure. That would be roughly 1:100. At that scale, 1 meter would be roughly 0.75 studs long or the height of ...

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Cleaning between the studs of a build
20 votes

When cleaning dust from scale models, sculptures, figurines or LEGO models I use an artist 'Fan' brush. This is the best method I've found to clean dust rapidly without damaging models. The fan ...

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What LEGO wheels would look like the three types used on the JPL Mars Rovers?
Accepted answer
6 votes

Here's what found after playing with all kinds of combinations. With this the three rovers will be at the same scale (about 1:5.8). This scale is small enough that the big rover (MSL) would not be ...

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