Saturday, October 6, 2012

Power Functions IR receivers compared, by the master Philo

Philippe Hurbain (Philo) did an extensive  and comprehensive research work (as usual) to help us getting the most of our PF assortment, using the new PF IR Receiver V2.

As per his measurements and conclusions, we can take a lot more power to energize our models, using the newest version of this receiver.
However, now the limits rapidly clash with the PF Battery Boxes' protection resettable fuse. Nothing that Philo doesn't have a solution for.

You can find all the details through three new pages full of measurements, graphs and explanations.

Of course, you have also his other valuable Power Functions resources

Below the video prepared by Philo to show the differences between V1 and V2 IR Receivers in a pratical example, and one sample of the graphics resulting from the measurements he made.

May the Power be with your models!


Alex Campos said...

Hmm, could this mean that there will also be new, more powerful "V2' battery boxes in the future, especially since upgrading the fuse is almost a trivial matter? Also, I wonder if the more expensive, harder to replace rechargeable battery can cope with the new receiver's requirements.

Philo said...

I'm afraid that the very limited current output depends on some regulatory safety issue for children market. I checked my photos of PF battery boxes, all three contain the same 750 mA rated resettable fuse...

Alex Campos said...

Hmm... in that case, the old 9V battery box, which doesn't have any circuitry, is at a big advantage. No wonder the 8421 Mobile Crane, which uses an old battery box to power its RC motor, doesn't have problems!

csiquet said...

Does the third version of the receiver has a V3 printed on it?
What version of the receiver does my 8275-Motorized Bulldozer have?

The V2 receiver is obviously much better than the V1. Thus than mean that the V1 is flawed and that we can ask LEGO to substitute it?

Alex Campos said...

No, the newest version is V2, which has "V2" printed on it. Besides it, there's V1, which most likely your 8275 has, and "V1.5", which replaced V1. The way to distinguish between V1 and V1.5 is that the latter blinks its LED once when you power it up.

As there's essentially nothing wrong with the previous versions (V1.5 corrects a bug in V1 that you wouldn't find anyway), I really doubt TLG will replace your receivers.

Philo said...

Old 9V battery pack does have a resettable fuse too (a metal looking disk sandwitched between two contact blades). But I know nothing (yet...) of its rating.

Alex Campos said...

Ah, I had noticed those some years ago, when I disassembled a battery box to run some wires to power it from an external power source (I didn't have any train controller at that time). But I never figured out what were they for (and the battery box worked fine without them anyway), and I think I lost them with the disassembly/reassembly...

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