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31 votes

How can I get my motor to line up with a linear actuator?

The axle is misaligned by half a stud, so an obvious approach to this problem is offset your motor by half a stud. The technique of offsetting bricks by half a stud is known as AZMEP (from the german &...
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26 votes

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

A fan is just 1/4 of a drone, right? Check out this lego drone that actually flies, for inspiration. https://youtu.be/wUVvQk7XLd4 The blade part in question is 89509
22 votes
Accepted

What's inside the SPIKE Essential small angular motor?

As far as I know, this is the smallest motor LEGO has produced since the micro motor in 1993: This new angular motor is not quite that small, but it is smaller than every other motor currently in ...
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17 votes

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

The easiest way to do this would be to use a motor with a high speed (or gear up a lower speed motor) and then attach one of the larger propeller elements to it. You can probably build a custom prop, ...
  • 34.9k
16 votes
Accepted

How much current do the LEGO motors draw?

YES! Philippe Hurbain (Philo) has put together a great and very detailed write-up on those and many other LEGO 9V electric motors. You can find it here: LEGO 9V Technic Motors compared ...
15 votes

Which is faster: M motor or XL motor?

XL (8882): It delivers a maximum torque of 90,4 mNm (600 mA). Without load its rotation speed is around 220 rotations per minute. L (88003): It delivers a maximum torque of 45,4 mNm (450 mA). ...
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13 votes
Accepted

How to build a steerable remote-controlled vehicle with just 1 motor?

This can be done without a caster wheel as well: Start out with a three wheeled vehicle, with two wheels in the front and one smaller wheel with less traction than the front wheels in the back. All ...
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12 votes

Can I safely dissassemble a 74569 motor (the old, fast 9v one)

Well, I opened it up without much success, and took some pictures of the process: At first I tried pushing/prying the light grey tabs away from the dark gray "bottom", but those weren't budging So ...
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12 votes
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What is inside the LEGO Powered Up M motor?

Let's take a look. The first step to disassembling the motor is removing the small Philips screw on the bottom: Now there are a pair of gray tabs in the back white section that we need to release. I ...
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12 votes
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What is inside the Technic Powered Up XL motor?

I was curious about this, and TLG was willing to provide me with one of these motors, so I opened it up. I was able to get the outer shell off by cutting down the 4 tabs on the outside. This motor ...
  • 34.9k
11 votes

Can I build a faster LEGO train motor?

Mathematically, the largest driver wheel you can buy for LEGO is Big Ben's XL driver, with a diameter of 36.8mm. To reach 10 mph, that wheel will have to spin: 36.8 mm diameter -> 115.6 mm ...
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10 votes

How can I transmit horizontal torque to vertical?

I'd like to cover two other techniques that work well, they both transmit horizontal torque to vertical but in slightly different ways that I believe may be useful for different situations. Worm ...
  • 17.4k
10 votes

Information on this large beige motor w/battery box?

It's the main module from Record and Play (set 4095): This part was only included in this set released in 2003. The part contains several motors and some electronics that allow you to record motor ...
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10 votes
Accepted

Electric motors - what for beginning?

If you're interested in comparing motors regarding to torque and what they can deliver, I would recommend reading Philo's excellent motor comparison page which has a lot of detailed information, very ...
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10 votes
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Difference between the "Simple Medium Linear Motor" (45303) and the "Medium Linear Motor" (88008) Powered Up motors

The main difference is that the 88008 Medium Linear Motor includes a rotation encoder with 1° resolution. Otherwise it weighs a bit more (34g vs 43g), is a bit slower (380 rpm vs 255 rpm) but also ...
  • 14k
9 votes

How can a Mindstorms robot lift something very heavy?

I'm assuming that you meant "the motor is not powerful enough". Surely you can use a gearing ratio & leverage to assist? Essentially you want the motor to turn many times for each small amount of ...
9 votes
Accepted

How to control a 88004 Servo Motor with a Raspberry Pi?

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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8 votes

What are the various LEGO motors that have been produced over the years?

For a comprehensive enumeration and measurements on all motors, refer to Philo's excellent page on this topic: http://www.philohome.com/motors/motorcomp.htm There are some LEGO motors that are ...
  • 14k
8 votes

Is it possible to use 5 motors on an EV3 brick?

A sensor port can't directly output to a motor. The sensor drivers can't provide enough power to supply a motor. You have a couple options: Daisy-chain two EV3s together. The first can control the ...
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8 votes
Accepted

Compatibility between vintage (80s/90s) Technic and current parts (motors etc)

The motor you have linked is indeed quite old and as far as I know, not compatible with anything newer. Seeing that it works with simple DC current, it wouldn't be hard to construct a converter cable, ...
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8 votes
Accepted

How deep can the axle go in the Powered Up L motor?

That is only 1 stud. So an axle of 5 always stick out 4 studs
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7 votes

Can I build a faster LEGO train motor?

10 mph (16km/h) is a crazy speed at that scale [citation needed]. Chances are quite high that your car will derail even on straight lines. Now, is it possible to reach that speed using lego motors ...
7 votes

How can a Mindstorms robot lift something very heavy?

Pulleys and gears With a range of pulleys and gears you can build something capable of lifting as much as 100 kilos with LEGO parts, albeit at the risk of putting enormous amounts of stress on the ...
  • 17.4k
7 votes
Accepted

What prevents a 12V motor, when pushed by hand, from providing DC electric out?

The 12v train motor uses 2-pole 3-slot technology. Because of thinner, but longer wire which results in a greater resistance and will create higher voltage, but lower current the current output isn't ...
  • 1,156
7 votes

How do I connect two models to one PF motor?

As an addition to Ambo100's very nicely detailed answer, I'd like to add one more option: If either of the two things you are powering might suffer from friction (or perhaps a child holding it still), ...
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7 votes
Accepted

How to get double the speed from 2 regulated EV3 motors?

By adding two motors together with gears, you have doubled the torque the motors provide. Power = torque x speed, so if you don't want the doubled power from the motors to go to the torque component ...
  • 16.5k
7 votes
Accepted

Can I still motorize Universal Building Set 8034 and other from that time with modern elements?

The length of the wire is another thing to be aware of. The wire attached to the motor in 8293 is only slightly more than 20 centimeters (might be a few centimeters more, I don't remember), you can ...
7 votes
Accepted

Confused about Power Functions M-motor 8883 and 8293

Yes, both items contain the same M-Motor part.
7 votes
Accepted

Which resistor value is used for which motor in Power Functions 2.0?

M Motor (Powered Up/WeDo 2.0) The M motor has a 2.2kΩ resistor between pins 5 and 6. Pin 6 is connected directly to pin 3. LED Lights I don't own any lights yet, but according to this post, they ...
  • 34.9k
7 votes

How to make an exact 16 degree turn?

This is actually a surprisingly difficult task. If you search for similar questions over on the Robotics stack exchange, you will find very smart people who can't even get it right with thousand-...
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