LEGO® Answers Stack Exchange
LEGO® Answers Stack Exchange

Questions tagged [power-functions]

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

138 questions
9
votes
1 answer

Inverting voltage to PF motor

I often use separate PF motor for each driven wheel. Sometimes the most interesting design of mechanism requires opposite polarity of power supply to motors. Is there any simple non-destructive way to invert voltage to one of motors?
Denis Otkidach
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7
votes
1 answer

Can anyone help me identify the motor/mechanism used in this?

I've been trying to recreate the Useless Machine found here: http://www.youtube.com/watch?v=QdKtgfmfA7s&feature=c4-overview&playnext=1&list=TLp4R5S7LPESk In the description, there's a link to a brickshelf gallery that has detailed pictures of the…
Iroh
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6
votes
1 answer

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. Also they are fixed on the same channel, but the…
FanLEGO
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6
votes
1 answer

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 loss". Can someone expand on that?
tooshel
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6
votes
3 answers

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 pack with 6 AAAs. Unfortunately the longest…
craigmoliver
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4
votes
3 answers

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 # 8886, cut the wire, and connect it to my custom…
Allan Xu
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3
votes
1 answer

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 anything I am at an Expert level for brick-based…
MonkeyWidget
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2
votes
1 answer

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 lights fit on the engine. I have watched a couple…
J. Hill
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0
votes
1 answer

How do you sync the LEGO high speed train remote?

How do you sync the LEGO high speed train remote?
TBD LATER
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0
votes
1 answer

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.
Nick
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votes
1 answer

How long does it take a M-motor to go 1 googol rotations?

How long would it take a Power Functions M-motor to turn 1 googol times? I have tried figuring it out with a calculator but I was confused.
Legofan35664
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