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Questions tagged [power-functions]

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

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6
votes
1answer
157 views

What is new about the IR receiver in the 4x4 Crawler 9398?

Reading a review of the 4x4 it seems the IR receiver is different from what is included with the trains. From the review all the information we got was "improved CMOS motor driver with lower power ...
6
votes
3answers
2k views

Making or buying a really long Power Functions cable

I'm working on a train layout and have built 2 automatic switches for the switch track. Each switch track is powered by M-Motor. I'd like to connect the 2 motors to a single IR receiver and battery ...
6
votes
1answer
558 views

How can I wire up the LEGO 2838?

I would like to know how to hook up the LEGO 2838 9v motor. I understand that the Power Functions extension wire is compatible with the 9v system, but how on earth do I wire them up?
5
votes
2answers
6k 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
3answers
3k 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 ...
5
votes
2answers
3k 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 ...
5
votes
2answers
342 views

What is a good third party battery box and receiver?

I got the LEGO 4x4 crawler for my birthday and I love it. But there is one slight thing which I hate: it has terrible range when using it outside. I know there is BuWizz which is a third party ...
5
votes
2answers
627 views

Gearing down a PF XL

I'm looking for the best way to gear down a Power Function XL. I need to achieve a very slow output RPM (less than 1-2 RPM). I've tried a 625:1 gear (trough 40:8 gear). Can someone link to a well ...
5
votes
2answers
204 views

Lego Motor for cycling a tool

I am curios to know if I can utilise the Lego Power range to rotate a transducer to a set point and return to its original position and if so is it able to cycle the movements repetitively? Ideally I ...
5
votes
1answer
1k views

How to build an automatic Lego train system?

I was wondering if anybody has ever tried using the IRLink NXT sensor to make an automated train system and if so, what kind of setup did you have to make it all work? I have been working on a train ...
5
votes
1answer
289 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 ...
4
votes
3answers
614 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 # ...
4
votes
1answer
313 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 ...
4
votes
1answer
637 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
1answer
133 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 ...
4
votes
2answers
999 views

At what voltage do the c1 and c2 lines run at when controlling a lego servo motor?

related: how to control a servo motor from a raspberry pi The raspberry Pi normally outputs 3.3 V signals from it's pins, however there are logic level converters for interfacing with higher-voltage ...
4
votes
2answers
313 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 ...
4
votes
1answer
3k 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 ...
4
votes
2answers
113 views

Is there on/off function on the 8879 IR Speed Remote Control?

Just got 8879 IR Speed Remote Control yesterday. Does it have an on/off switch? We don't see one.
4
votes
1answer
1k views

EV3 controlled by 8879 speed control through IR sensor

Is it possible to send commands to an EV3 brick from the Power Functions Speed Control remote? Would I have to interpret the raw sensor values to do this? Are there any references that would help?
4
votes
1answer
432 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 ...
4
votes
1answer
287 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: ...
3
votes
1answer
93 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?
3
votes
2answers
276 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 ...
3
votes
2answers
370 views

Need advice re Power Functions

My 11-year old son wants to add power to his creations but neither of us know quite how to start this new adventure. He doesn't have any Technic or Mindstorms sets. Looking through sets online, it ...
3
votes
1answer
208 views

Problem-shooting on 8070 “Super Car” with Power Functions

I have recently bought a used Lego Technic car (8070 Supercar). It was not fully built, and from the instructions I learned that it was fully built except for approximately the last 10 steps. I ...
3
votes
1answer
79 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 ...
3
votes
1answer
104 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.
3
votes
1answer
42 views

Power Function IR Remote always emitting after putting batteries

My PF IR remote led indication light is constantly on after I put in new batteries. It stay on without me touching anything. A quick check with my phone camera showed that the IR emitter is emitting. ...
3
votes
2answers
157 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 ...
3
votes
1answer
898 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
906 views

What is the correct input voltage for the 9v Lego train speed regulator?

I wanted to buy a transformer for the speed regulator, so based on this image, I bought a transformer with 12V DC output. It works. However, discussing this with a fellow AFOL, he pointed out that ...
3
votes
1answer
394 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. ...
3
votes
1answer
269 views

Eneloop NiMh batteries not powering 42030 loader

Is it because the batteries are only 1.2V? It works fine with Duracell alkaline batteries.
2
votes
1answer
336 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 ...
2
votes
3answers
468 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 ...
2
votes
1answer
722 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 ...
2
votes
2answers
548 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 ? (...
2
votes
1answer
47 views

How to prevent PF M-motor from springing back

I'm currently building a car with a simple 2-speed remote controlled sychronized transmission, shifted by a PF M-motor. Everything is fine except for one thing, the transmission driving ring is ...
2
votes
1answer
4k views

Adding Power Functions to LEGO Mack Anthem Truck (42078)

Does anyone have experience adding Power Functions to set #42078 LEGO Mack Anthem truck? It’s a Technic set, but only features manually actuated functions. I have seen it motorized on YouTube, ...
2
votes
1answer
156 views

Has Anyone Motorized Ocean Explorer Set #42064?

Me gustaría saber si tiene alguien monitorizado motorized el LEGO Technic - Explorador oceánico 42064 y si es así si alguien podría pasarme las instrucciones? Muchas gracias! Google Text Translated: ...
2
votes
2answers
163 views

Which wheels are suitable for Power Functions M-Motor

I'm attempting to build a small self-propelled LEGO robot. Initially I was attempting to use some cheap DC hobby motors but I spent a lot of time trying to attach LEGO wheels to the motor's 3mm ...
2
votes
1answer
286 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 ...
2
votes
1answer
3k views

How to fit lego power function LED lights onto cargo train (set: 60052)

can anyone out there explain / illustrate how to fit lego power function white LED lights on the blue cargo train (set number 60052)? We have assembled the engine but I cannot see where or how these ...
2
votes
0answers
116 views

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 it is still too loud and it ...
2
votes
0answers
112 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. ...
1
vote
1answer
367 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 ...
1
vote
2answers
84 views

Is there any easy, documented or official way to replace pullback mechanism with Motor Set 8293

There are many Technic cars with a pullback mechanism, like 42059, 42073 or 42072. Is there any systematic, easy, documented or official way to replace the pullback mechanism with the LEGO Technic ...
1
vote
1answer
2k views

LEGO Power Functions M-Motor 8883 characteristics

I have a couple questions about LEGO Power Functions M-Motor 8883 (http://shop.lego.com/en-US/LEGO-Power-Functions-M-Motor-8883): Is it synchronous or asynchronous? It is powered by AC or DC?
1
vote
2answers
332 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 ...