Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [power-functions]

A category of powered LEGO products which offer direct and remote control of action bricks.

3
votes
1answer
50 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 ...
3
votes
1answer
42 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 ...
2
votes
1answer
74 views

Confused about power functions motors 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 ...
0
votes
1answer
39 views

How much do the PF XL motors help speed in the 4x4 crawler?

I'm wanting an answer if anyone has swapped the PF L motors in the 4x4 crawler to PF XL motors and if this increases the speed or not.
3
votes
2answers
64 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 ...
0
votes
2answers
72 views

Third power functions train runs backwards, why?

We have the passenger train and freight train, both run from a single controller one through the red and one through the blue side. At Christmas we got the holiday train and with the power functions ...
0
votes
0answers
102 views

Power function LED Lights for 42077 Rally Car

Do I need to add anything else to the power function list for the 42077 Rally Car to add the LED lights?
10
votes
1answer
1k views

How can I motorize 42077 Technic Rally Car with LEGO Power Functions?

The new 42077 Technic Rally Car set looks really nice, and even has a built-in steering system which can be controlled by a gear on the top. There's also a fair bit of extra room inside, is there a ...
7
votes
2answers
94 views

Can I use two remote-controlled LEGO Tracked Racers 42065 simultaneously?

I want to buy two sets of the LEGO Tracked Racer 42065 so that my children can play together. I can't tell if they would be able to use the racers simultaneously. Are the IR receivers multi-channel? ...
3
votes
1answer
292 views

Using the unregulated motor block and conversion cable to light LEDs

I have the following setup: It consists out of An EV3 brick A nxt to 9v conversion cable (https://www.bricklink.com/v2/catalog/catalogitem.page?P=x1676) A 20 cm 9v to Power Functions conversion ...
4
votes
2answers
76 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 ...
0
votes
1answer
236 views

Power Function Converter Cable for LEGO MINDSTORMS

This is a follow up to this question: How to use Power Functions with Mindstorms EV3? The question was asked in 2013 (5 years ago). Fast forward to 2018, the product that was suggested in the answer ...
4
votes
3answers
197 views

Looking for ideas to make wire connectors compatible with Lego Functions

I like to make custom battery packs for Lego Power Functions. Is there any simple way to make wire connectors? The only option that comes to my mind is to buy LEGO Power Functions Extension Wire # ...
2
votes
2answers
177 views

Can I convert my train 9V 4563 to the power function motor?

The motor of my locomotive is dead. I have two choices : repurchase it or buy a power function. It is possible of customize my train 4563 to use the power function motor ? If yes, what set to buy ? (...
3
votes
1answer
310 views

What is the best solution to power up two 5292 buggies?

I have two buggy motors, 5292 like this: I see powering each separately and using two IR receivers soon triggers the receivers' protections and the motors are stopped. My aim is not speed, I see ...
3
votes
1answer
174 views

How should I get started with LEGO trains?

I'd like to get started with LEGO Train. I understand the PF system is The Way, and the tracks are generally mutually compatible, but the exact interplay of trains & power components eludes me. ...
2
votes
3answers
220 views

Bucket Wheel Excavator not powering up?

I just finished to assemble the Bucket Wheel Excavator (42055) set, I inserted new batteries in the battery box and tried to power it up. The led on the battery box blinks for a millisecond almost ...
0
votes
0answers
89 views

How can I combine multiple PF XL Motors [duplicate]

I have built an enormous and heavy Lego RC tank, driven by 2 XL Motors, connected to a subtractor, one motor is for steering, the other is for propulsion. Despite having already geared down the motors ...
7
votes
1answer
374 views

Why are there 4 wires leading to the Power Functions LEGO train motor?

Does anyone know what the wires do? If the Power Functions train motors are simple DC only 2 wires would be needed or is it more complex than that?
1
vote
1answer
214 views

Lego Technic 42048 with Lego 8293

I have seen a YouTube Video that claims the motorization of Lego Technic 42048 using Lego 8293. However, the Lego support site does not state such compatibility. I am not able to get my hands on a ...
3
votes
1answer
61 views

Augment Lego 60139 with power functions Lego 8293?

I have the Lego 60139 set for my child. If I buy Lego 8293, will I be able to motorize the truck in 60139 set?
4
votes
1answer
98 views

What sets are these electrical parts from

I have been searching for a long time but I am struggling to find the origin for these parts. I think they are possibly Power Functions IR remotes & battery packs...? Thanks for any help.
4
votes
1answer
162 views

How to power up MOC-0308, based on Technic 8297?

I have built the following MOC, with details here and here. It is pretty complete, although I would have tried some servo motor for steering. But after I've finished it, I've got into trouble: ...
6
votes
1answer
109 views

54950c01 vs 59510c01

What is the difference between these two battery boxes, 54950c01: and 59510c01: except for the on/off button? Which electrical connectors are compatible with each of those? Is there a counterpart ...
6
votes
2answers
3k views

Is the LEGO BOOST kit compatible with EV3 or PowerFunctions motors and sensors?

I'm curious if I can use my existing EV3 and/or PowerFunctions motors to extend the functionality of my LEGO BOOST set. Is this possible?
5
votes
1answer
182 views

How can I improve my rackless steering design?

I am trying to build a vehicle with a sturdy steering mechanism powered by the servo motor. When I was a kid I did this all the time with a rack and pinion design, but now I don't have any of the rack ...
12
votes
1answer
202 views

Are there any benefits to using PF motors instead of EV3 ones?

Can someone explain to me the key differences between PF motors and EV3 ones? I understand that EV3 motors are 'regulated', presumably meaning that you can control their rotational speed depending on ...
4
votes
1answer
1k views

Why is the LEGO IR Receiver V2 not widely produced? Or are they?

Basically, there are 2 different major versions of the LEGO IR Receiver, the unmarked V1 and the labeled V2. I've also read somewhere there was also a small hardware upgrade to the V1 Receiver at some ...
5
votes
1answer
157 views

Problem with running two XL motors motors

We are trying to run our Grand Prix racing car on remote control and would like to use two XL motors for the wheels. One motor on its own works fine, but when connected together the motors stop ...
6
votes
3answers
761 views

My grandson wants a LEGO motor. What should I get?

My grandson wants a LEGO Power Motor to use with his gigantic box of Lego pieces. He is 11 years old and seems to know his way around the world of LEGO bricks. I, though, haven't a clue what he is ...
6
votes
2answers
1k views

9V Battery instead of PF Battery Box

I want to use the PF Light Unit in a small MOC. The battery box contains six 1.5V batteries and is too large. How can I use a regular 9V block battery to power the lights (and possibly other 9V ...
8
votes
2answers
206 views

How do I connect two models to one PF motor?

Hi there I am trying to see if it is possible to connect the Ferris Wheel AND the Winter Village Carousel to one Power Functions motor. Is this possible? Does anyone have a link to a video perhaps ...
2
votes
0answers
100 views

Remote for Holiday Train 10254 Unresponsive [duplicate]

The remote isn't lighting up to show it's transmitting. Can't get train to run when motor is connected to IR receiver. Tried connecting motor directly to battery and it runs, albeit at warp speed. ...
2
votes
1answer
458 views

2016: which Power Functions for controllable car?

I want to make a car or truck that can be driven by a controller. Q: what Power Functions sets do I need in 2016? Any other suggestions? I have no Technic nor Power Functions I'm willing to buy ...
7
votes
3answers
2k views

Running Power Functions Train Without IR Receiver/Remote

I recently bought 10254 Winter Holiday Train and wanted to get it running around the provided circle of track. I was wondering if there is any way to do this without incorporating the IR receiver and ...
1
vote
2answers
299 views

Starting Lego robotics projects low-budget with the intention of expanding later

I've been digging around for cheap ways to build and control simple devices and was looking at the Mindstorms sets when I found WeDo and WeDo 2.0. WeDo appears to be compatible with Power Functions ...
4
votes
1answer
102 views

Drive motor via Power Functions IR with own power source

I want to see if it is possible to drive a Power Functions motor both with variable speed and forward/reverse with my own power source. I am planning to use my own power source, an IR receiver and a ...
7
votes
3answers
2k views

How to power “Power Functions” devices from an electric wall plug?

In this video showing an example of Great Ball Contraption, we can see (at 1:35) that some trains powers are used to power Power Functions motors: That must be more convenient than having to ...
7
votes
1answer
921 views

What LEGO Power Function parts do I need to make an RC car?

I'd like to make a remote control LEGO car with steering and forward/back functionality. Looking at the LEGO Power function parts I'm assuming I need the following: A battery (8881 or 8878) A motor ...
5
votes
3answers
1k views

Does the LEGO “Power Functions Extension Wire” (8886) work in both directions between old 9V and new Power Functions devices?

Here is the LEGO "LEGO® Power Functions Extension Wire" (8886): We can see that the left connector can connect to old 9V electric bricks or wires and the right connector can be plugged to the new ...
4
votes
2answers
97 views

Is there on/off function on the 8879 IR SPEED REMOTE CONTROL?

Hi… Just got 8879 IR Speed Remote Control yesterday. Does it have an on/off switch? We don't see one.
3
votes
1answer
207 views

Eneloop NiMh batteries not powering 42030 loader

Is it because the batteries are only 1.2V? It works fine with Duracell alkaline batteries. Thanks in advance.
2
votes
1answer
234 views

How to Motorize the LEGO Mars Rover

I am looking for some suggestions. My daughter is building the Mars Rover set (go here for the details: http://www.eurobricks.com/forum/index.php?showtopic=98222) for a presentation at school and I ...
6
votes
1answer
978 views

Problems with New LEGO Cargo Train

My son's LEGO Cargo Train worked the first 10 minutes and then stopped. The batteries are new, Duracell, and both, the remote and the receiver, seem to be ok. Both of them have the green light on. ...
0
votes
1answer
700 views

How do you sync the LEGO high speed train remote?

How do you sync the LEGO high speed train remote?
8
votes
1answer
632 views

How much current do the LEGO motors draw?

I'm building a project with Raspberry Pi and some other electronics driving the LEGO Power Functions M-Motor (8883) and I need to know how much current those motors draw under load. Has anyone done ...
4
votes
2answers
2k views

How do I diagnose a problem with electronic bricks and motors?

My children and I recently assembled the 42030 RC VOLVO L350F Wheel Loader (aside: with the 1,600 pieces and time investment, this set will likely survive to the heat death of the universe intact ...
4
votes
1answer
343 views

Wiring and Controlling an 88004 servo from a RaspberryPI

My 88004 servo does not move at all. Don't know how I should connect the wires correctly. I think the inner two cables are C1 and C2 and the outer two GND and VCC. When I connect 6.5V to the outer ...
5
votes
1answer
166 views

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

RCX, NXT, WeDO, EV3, Technic etc. How many different motors have been released over the years??
6
votes
2answers
2k views

Custom Power Functions plug design

I'm considering the possibility of making my own Power Functions-compatible sockets for a project. I'm designing a module board for a single-board-computer with motor drivers and would like to encase ...