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Questions tagged [motor]

A motor is a machine, especially one powered by electricity, elasticity, pressure, internal combustion or some other means, that supplies motive power for a device with moving parts.

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4 votes
1 answer
314 views

Does LEGO sell a DC relay for Power Functions?

I’d like to use a signal from a (5V) littleBits circuit to control some (9V) Power Functions motors. Does LEGO sell or recommend a DC relay to facilitate this sort of thing? If the answer is no, I’d ...
EJ Mak's user avatar
  • 450
3 votes
1 answer
146 views

What is the maximum voltage for motors from Cybermaster units?

I recently bought a non-functioning Cybermaster unit [part:71797]. As the motors in there might be perfectly fine, I'd like to use them. I could not find information on these motors (as opposed to ...
kai-dj's user avatar
  • 133
7 votes
0 answers
195 views

Oil for old 4.5V motor? (UK)

I've just got my old LEGO Technic motor from my loft. It works but squeals in a way I don't remember it doing (35 years ago). I assume some lubrication would help and I've seen references to 3-IN-ONE ...
Derek's user avatar
  • 171
5 votes
1 answer
271 views

Lego RCX to NXT converter cables not working properly with EV3

I recently got some of these cables(see picture below) to control an old RCX motor. Some things to note before reading on. I tried both the medium and large motor blocks and played around with power, ...
ElectronicsNoob's user avatar
3 votes
1 answer
3k views

How to Motorise 42111 Dom's Charger Technic

I just received the 42111 Dom's Charger set as a gift, and I was wondering whether it could be motorised and RC controlled? A part list would be great as I don't own any Power Function parts. Cheers ...
Adam Brogden's user avatar
0 votes
0 answers
507 views

The Powered Up app won't connect to my Technic Hub

I have recently bought a Technic Hub and four Powered Up L motors, but currently I only put two motors into the B and D ports of the hub. I downloaded the Powered Up app to a tablet and used the "...
user39178's user avatar
  • 217
6 votes
1 answer
368 views

How deep can the axle go in the Powered 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?
user39178's user avatar
  • 217
1 vote
1 answer
140 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 ...
user39178's user avatar
  • 217
4 votes
1 answer
669 views

What is the power of Lego Powered Up motors (M, L, and XL) and the Move Hub motors?

I am trying to build a setup that includes two propellers that can pitch up and down. I am debating whether I should use two motor to power each propeller and the other two to act as servos for each ...
user39178's user avatar
  • 217
7 votes
1 answer
1k views

What is inside the Technic Powered Up XL motor?

What components are inside the new Technic Powered Up XL motor? Is it the same as the PF XL motor, except with a different connector?
jncraton's user avatar
  • 40.7k
5 votes
1 answer
291 views

Repairing a 12V switch motor

My son caused me to dig up my old 12V LEGO trains. Surprisingly they mostly work, except for one part - Electric, Train 12V Remote Control Switch Motor 4 x 8 x 1 2/3: This is the motor that drives ...
hyperman's user avatar
  • 151
8 votes
2 answers
6k 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 ...
Nerd's user avatar
  • 439
2 votes
2 answers
1k views

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

After looking at this question: Can I remotely 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 ...
Offer's user avatar
  • 23
4 votes
2 answers
2k views

Mindstorms EV3 unable to drive two motors simultaneously

Yesterday I had the basic driving robot with two large motors, but I could not get both motors running at the same time. I had the tank control programming block, with both motors set to 50% and when ...
jboss's user avatar
  • 61
7 votes
2 answers
1k views

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

I've recently got my old Technic out for my daughter (who's a little young for her own, but her Friends now drive around in a tank). If I start to acquire more, and more sophisticated, motors and ...
Chris H's user avatar
  • 637
5 votes
2 answers
1k views

Electric motors - what for beginning?

I just got my first Technic joblot and now I am thinking about adding motors. I already have some - cheap ones from Amazon. I attached 1 axle pin to such motor with glue gun, works well except one ...
Sławosz's user avatar
  • 169
1 vote
2 answers
786 views

Port Splitter for EV3 motors

I have searched all over the internet for EV3 port splitters for motors. I have got 4 large motors and 2 medium motors and I do not have enough motor ports for them all. I can usually only find sensor ...
The_Indestructible_Cat's user avatar
2 votes
1 answer
96 views

How to prevent PF M-motor from springing back

I'm currently building a car with a simple 2-speed remote controlled synchronized transmission, shifted by a PF M-motor. Everything is fine except for one thing, the transmission driving ring is ...
technicguy1's user avatar
1 vote
2 answers
269 views

How can I prevent my finger from getting injured between gears?

Recently I was building a prototype for a LEGO tank chassis and I tested it, but my finger got caught between the gears, resulting in my finger getting cut. Are there any ways to prevent that from ...
technicguy1's user avatar
0 votes
1 answer
1k views

Arduino-izing LEGO Technic - and now I need some ideas for the Lego Service Truck 8071

I am starting a project - Arduino-izing LEGO Technic - and now I need some ideas for a car / vehicle to choose. This project starts out as a quest to find a way to combine the ease of LEGO Technic ...
zero's user avatar
  • 173
7 votes
1 answer
2k views

What is the quietest LEGO motor?

What is the quietest LEGO motor? I am trying to make a sort of LEGO dolly for filming videos, but the motors emit a lot of sound. I noticed the train motor is quieter than the other motors I have, but ...
technicguy1's user avatar
2 votes
1 answer
974 views

How do I run the LEGO Technic V6 engine using a Lego electric motor?

I am not into LEGO, don't know anything about it, so I will try to be as specific as possible. My goal is to spin the LEGO Technic V6 engine (preferably at some realistic RPM's like thousands). ...
SHC MostWanted's user avatar
1 vote
1 answer
92 views

Can a v1 PF reciever power an XL motor and servo?

I have a v1 PF receiver but don't want to pay $35 for a v2 receiver and I was wondering if a v1 receiver can power a single XL/L motor and a servo.
technicguy1's user avatar
2 votes
1 answer
1k views

Can two Powered Up train motors be plugged into one hub

I have set #60198 and it comes with one Powered Up motor. I'm hauling many many cars and one motor isn't enough any more. I see there is a slot for "B" on the hub. Is it possible to plug in another ...
jason's user avatar
  • 177
2 votes
1 answer
109 views

Rearing off to the left without telling it to

I've started to build a robot, but when it drives it veers off to the left even though I'm just telling it to go straight. I think I need to do something to the motors but I don't know what or how. I'...
Donna Walters's user avatar
2 votes
0 answers
125 views

Makeblock and LEGO PF cable synthesis

My 10yo son and I have ventured into the realm of taking our LEGO hobby up a notch with robotics. We have built the makeblock mbot and adapted LEGO bricks and want to incorporate the Power Functions ...
Jarod Thornton's user avatar
3 votes
1 answer
617 views

Two motors are driven forward, why are they rotating in different directions?

I have the Lego Mindstorms EV3 Pack and built a simple car with 3 wheels. The back wheels are motorized. When I run the following code: Motor.A.backward(); Motor.D.Backward(); both motors are ...
weiterleiter's user avatar
0 votes
2 answers
352 views

Can't link variable inside a switch when creating a new block

I have a problem when connecting the variable (from the create a block) to a variable in the function because it's inside a switch. How can I link them? I want to connect the variable to each (20) in ...
Ryuk's user avatar
  • 1
5 votes
2 answers
255 views

How to mirror an EV3 motor?

I want to get one EV3 large motor to copy the other. So if I move one half a rotation the other copies.
Nixtoo's user avatar
  • 51
8 votes
2 answers
610 views

Read power usage and respond when motor is straining

Is there a way to know if the drive wheels are "straining", like when locked up with an opposing bot? This is for a Lego sumo bot using the Lego Mindstorms Education EV3 Core Set (EV3 Large Motor ...
efreed's user avatar
  • 195
4 votes
1 answer
1k views

I'd like to build a mechanism to press buttons on a remote control. What is a good basic approach to use?

I have a small remote control like device with about 11 buttons. The centers of each button are placed about 1.1cm apart, and each are about 0.7cm in diameter (this means about 0.4cm between the edges)...
tamsanh's user avatar
  • 41
1 vote
1 answer
84 views

Can I push the train of 60052 [duplicate]

We more like to push trains with hand. There were old ones, like the train of set 2741, where when pushing the engine, the contact became loose between the axis and the cog wheel. Can I count some ...
Display Name's user avatar
9 votes
3 answers
470 views

What's the best way to start an 8 year old on Lego Technic building?

I'm a grandpa trying to start my 8 year old grandson in LEGO Technic building. I am particularly interested in mechanical parts building and motorization. He already loves LEGO and attends after ...
DRS's user avatar
  • 91
14 votes
2 answers
796 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/...
Chris's user avatar
  • 243
5 votes
1 answer
625 views

Are there any difference between the Power Functions 88003 and 99499 L motors?

I am planning to attempt a couple of RC MOCs and was looking up the power functions L motor on BL and found that there are actually 2 types of the L motor, namely the "88003 Power Functions L Motor" ...
Fong's user avatar
  • 51
2 votes
1 answer
944 views

How can I get the EV3 to control an ordinary motor with PWM?

Looking at the hardware developer pdf, it looked like the EV3 should output a PWM signal with a duty cycle corresponding to power level. It does, but only for 100ms and only on pin 1. Is that how the ...
griffin175's user avatar
4 votes
2 answers
772 views

How to make an exact 16 degree turn?

Does anyone know how to make an exact 16 degree turn with a LEGO robot?
Cyrus's user avatar
  • 41
3 votes
1 answer
167 views

Get robot to face perpendicular to nearest object, using the ultrasonic sensor in NXC?

I have an ultrasonic sensor attached to a motor so that the sensor can rotate. Right now it stops once it scans a value less than 65 cm. What I want it to do is to scan its surroundings and then face ...
notexactlygoodatNXC's user avatar
6 votes
1 answer
955 views

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

Based on the answer here it seems that resistors are used to detect what is plugged in with LEGO Power Functions 2.0. So which resistor values (or ranges) apply to which motors or other devices? Are ...
chicks's user avatar
  • 5,273
9 votes
1 answer
3k views

What is inside the LEGO Powered Up M motor?

What is inside the M motor in the new Powered Up system? How is it different from the older Power Functions motor?
jncraton's user avatar
  • 40.7k
10 votes
1 answer
2k views

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

The EV3 brick has only four output ports (A B C & D) to run motors. Is there any way to use port 1 (sensor port) to control a motor?
Amardeep's user avatar
  • 101
3 votes
1 answer
129 views

Is it expected that LEGO will produce small (S or XS) PF motors?

The existing LEGO PF motors are the M, L, and XL, making builders suspect that the S and even the XS names were left out and reserved intentionally for later designs. However, the M motor was released ...
BalazsToth's user avatar
3 votes
1 answer
587 views

Confused about Power Functions M-motor 8883 and 8293

Is the motor that comes with the Technic power functions motor set (8293) and the stand alone motor 8883 the same? We have just built the LEGO Creator 10261 roller coaster set and it specifies a 8883 ...
Magic Bullet Dave's user avatar
3 votes
2 answers
242 views

XL motor and M motor on IR receiver = same output?

I am really puzzled by my small car build with balloon tires (55976). I tried swapping between an XL and an M (PF) motor, both geared down (up?) to about the same torque (I tested by how sleep a slope ...
fltcpt's user avatar
  • 31
1 vote
1 answer
116 views

How to send through Bluetooth motor angle position and mirror that position on another motor?

I've built a steering wheel that checks the servomotor position using NXC function - MotorRotationCount(). Now, I want to send that position to second brick using Bluetooth and apply that servomotor ...
Kacper Reicher's user avatar
3 votes
3 answers
164 views

NXT motors spin when in air but stop on ground

I have a car that I made with 2 motors in the back and one motor in the front. The motors spin fine in the air but when I put it on the ground to test my program the motors stop. The robot itself isn'...
huvarda's user avatar
  • 31
0 votes
1 answer
319 views

Help with Multiple Motors/Intelligent Bricks and coding/ programming/ daisy chaining

I have built the accompanying robot earlier in the week. I have a challenge where the robot needs to find white/black bricks then store them on a tray and then travel over to another robot and ...
Al Bulg's user avatar
2 votes
1 answer
951 views

EV3 Unregulated Motor - different plus/minus power behavior

I'm helping some fellow Bay Area LEGO User Group builders who want to use an EV3 to power a 9V train. I'm using the NXT to 9V conversion cable (https://www.bricklink.com/v2/catalog/catalogitem.page?P=...
Walt White's user avatar
3 votes
2 answers
137 views

Angular resolution of NXT motor

I am sure that I read somewhere that the resolution of the motor sensor was 2 degrees, but I can find no mention of this in the NXT Help file. What's more, the motor control block allows the Duration ...
Derek Andrews's user avatar
4 votes
2 answers
709 views

What about Power Functions motor, S size?

LEGO Power Functions has motors in M, L and XL sizes. Usually, if someone uses this size designations, the smallest one is S. It would make sense to have them named S, M and L if there were meant to ...
Mołot's user avatar
  • 1,409