NoEXIST

I mean if motors spinning with different rpm is bad, but this not going to happen Maybe we don't understand each other, but if you change polarity of one of the motors, esc not going to know about this and just let the motors spin at the same speed. It's not about reversing a channel using receiver, it's about exchange + and - while soldering one of the ports P.S. there will be only one esc for PF ports, so there's no problem with spinning speed

But it you physically reverse the contacts on the motors signal on the ESC is still the same. There might not be a problem that one of the motors will spin faster then other

The ESC I choose has one, I hope I will be able to make top cover of the deck be easily openable so it gives access to that switch. I think asymmetric pověr curve won't be that matter on secondary functions

Well, I think it's possible to make few versions instead of trying to compromise everything in one. First one is RTR kit as I showed in the beginning, there we can't change receivers and battery is inside. Second one is a box with esc's where you should connect everything from outside. I'm also going to attempt to reduce size of the deck as it now has less components.

Size is the same, but bottom cover is a bit different as it don't need to slide on battery as it has battery and receiver outside

Oh... Well, even if this doesn't seem true I hope they just found a better solution for the battery and didn't tell... Screenshot is from Sariel's video, so it's pretty old

Never heard about 2200mah in buwizzes, maybe 800 Also noticing that it is 5c, so there's no wonder why it is that small. I was trying to research the lipo battery market, the best one I found was something like 3s 450-600mah 45c. Or some expensive 1s 800mah 60c, so you need 3 of them, which is quite complicated

Some updates for today! I've tried to design universal version of the deck as requested! Now receiver isn't in the box, whatever receiver you have can be connected from the side. Under signal ports there is a power port. Another improvement is that I moved PF ports to reduce wire bending as was mentioned. Also geekservo port was finally added.

@Ryokeen so your idea is to make a box for esc's and the receivers are just separately? This is pretty interesting concept. Similar to a classic rc setup but with more channels;) In this case dumbo X10 can be used for a crazy amount of functions

Hm, that's interesting. I found just a bit of information about this on Google, but they are also saying that you can damage your battery only if your motors consume more than battery can provide. Also in this case I wonder how is bw 3.0 working with 3s 800mah 5c lipo battery That's actually a backside of such projects, ppl will need a bit different preferences and you can't actually make universal product as it is possible for buwizz because of Bluetooth control. Maybe I'll let customers choose what they want for their Deck:) Got myself some time ago rc kit for Lego, receiver with gyro is pretty fun! One of the pros of dumbo receivers that even smallest 4CH receiver has a gyro version. However it might affect count of channels you can use for motors

We won't know how it's going till the end? Gonna be stressful 2 weeks

A bit crazy idea, but definitely useful, I'm not sure there is enough area on top to squeeze it all. Maybe a good idea for other versions? Like making it (top part) 8x5x2

@gyenesvi RECEIVER: Actually as I'm not going to produce them as much as buwizz do, there will be an option to try whatever receiver customer wants, but it might be as small as this one is: I actually have seen similar receiver from FlySky, I think it can be possible with it. I also did a bit calculations, the price won't be too high compared to competitors even if the transmitter is included in the kit. ESC: Two outputs are controlled simultaneously for porpulsion, one 30A ESC for both PF ports. SERVO: You're right that it is a comlication and I'm not sure there is a space for extended FW for them(waiting for components to make first working prototype). There is a way that maybe is even better than PU servos - Focus on GeekServo and making two "dumb" ports for other functions(gearboxes, diff locks, LED's, etc.). They can be PU ports and PF aswell. In this case it can have even 4 channels which might be useful. CONNECTORS: I come with the experience of my friends who did these or similar things for themselves. 2 Buggy motors is a crucial moment when it can melt. There's two way out of it: Nylon connectors for the motors which is not at all practical in terms of sales. Y-wire - one port to 2 motors BOARDS: This time I'm definitely go for separate electronics, so it's easy to exchange one of the components. BATTERY BOX: I'm making focus on a Deck itself and battery box can be a nice addition for the ones who want. There is a lot of pros to separate battery and "receiver" Didn't quite understand the question, but there's no problem to put 2 motors on separate ports instead of stacking

In my opinion this is the easiest way to reverse the motors. Imagine building a chassis that uses 4L motors, they are geared to one axle, but two of them are spinning in a wrong direction. That a situation you will need to rotate your connector.

It is a great competitor, but for me it's real purpose is different to purposes from buwizz ads. I think the advantage of using only one rc deck instead of few few buwizz units is significant, but you are definitely true, this product is for small category of people. Using 2 PU ports is already a compromise to make it useful for more people, but it's definitely a complication. If I can’t cope with controlling of PU motors in servo mode, it seems to me that it won’t be a big loss to switch to PF connectors for all channels, since lately I’ve seen more and more people using alternative servos such as Cada. Also, using a geekservo has a lot of advantages compared to any version of Lego servos. Creations as remake of Traxxas bronco aren't really a creations that are designed for driving performance. Again, more like complex cranes, in my opinion.

I was thinking about more ports, but this can't be done as it was in buwizz. The problem is how much current can provide buwizz for each port, in reviews if I remember correctly, were told about 6A (in peak?). So if you are using powerful rc esc's there's simply no space for 6 of them. Even if I remove sliding feature. Port configuration of course can be changed, but there will remain 3 channels

That's exactly what the purpose is:)

2s and 3s lipo's can be used. I choose 14500 batteries for the box because they less likely will be discounted than a noname lipo battery that matches size of a box. It uses jst connection. As a product it can be a full brick with battery and also just a "receiver" without a box with 14500 batteries, so you can put your lipo everywhere in your MOC and it can as big as you want

There will be some more connection points, especially on the top(as it can be used without this battery too). It will have separate 3pin port, but will be connected to the same channel. I'll double that one socket on receiver and first will go directly to the body, and second one through Arduino to the control+ motors. At least I hope this will work:)

FRIST POST UPDATE Customers got first units and there are some things need to be mentioned. BATTERY TO USE: I highly recommend using 2S LiPo's. All units were tested on 3S and can run, but came out you have to be really gentle on your throttle. Nothing like this if you use 3S: Updated 3S version is in work… BACK TO THE BEGINNING Project is in progress, first real built prototype coming soon. (Not final look, not every way to connect it to your build is included in these renders) The main idea is to use RC transmitter with Lego. This is the best way to control your model. Especially fast models. RC Deck will have several ways to use: 1. As a brick - Top part will slide and connect to the battery box with two 14500 elements - 2s 7,4v 1000mAh (Vapcell H10) This allows you to use familiar form factor of battery. Size is 8x4x4 studs (one plate higher comparing to the buwizz 2.0 brick) Up to 2 Buggy motors can be used, your electronics are completely safe with 7,4v The best thing about using it this way, you can easily put there another 14500 battery if first two are discharged right now 2. As a transmitter - You can connect to the deck whatever lipo battery you have (limited by Lego motors possibilities) Allows you to use up to 4 buggy motors - stacking more than 2 motors on one port isn't recommended as Lego connectors can melt (that's why there's 2 ports for driving channel) Allows you to use small size of Deck itself and move battery away Parameters: Ports/Channels: - 2PF ports to use more powerful motors for propulsion - 2 Control+ channels - 1. Steering (there will be opportunity to use RC servos or GeekServo with this channel) - 2. Additional function Electronics: RC Deck: - Receiver - Dumborc x4fm - 30A brushed ESC for PF channel - 2 5A brushed ESC's for Control+ channels Additional battery box: - Vapcell H10 Details: - sliding RC Deck on the battery at the same time connects it - complex PF ports for polarity reversal without weak points as switches are Hope you like the concept! Feel free to leave your opinion or your ideas to improve this thing. P.S. Hope this topic is okay for this part of forum

So there's a sort of generic rc differentials inside this frame? Must be really sturdy for Lego!

Passanger Snowcat Functions: Drive - 2L motors (one per track) Lifting Blade - M motor 4 pairs of LED lights

Good news, I managed to take advantage of the last snow day for a while in my country It turned out, I need better tracks to attack snow piles, but there are some shots of it

Glad to hear that! Today was the first time outside for this MOC, after all, size matters... It really struggling to go through the snow, but I got some nice shots. Lego was right, it's indoor toy;)

I had some more ideas about entry for this contest. But some of them didn't come out as well as I wanted to. Here is some of them: I didn't really like the first one and the second one wasn't possible to finish because my servo died I was already sure I need a small tracked vehicle, I found this two prototypes and I needed to combine them... It started with small tracks Chassis wasn't that challenging, but my nightmare was closer. For me point of this creation is appearance and playablity. So there is no more options than one motor per function. And last buwizz output will become a light output. 2/3 of wires are done, and another pair of led laps is coming... While building I noticed that it also should look great as a pickup, but not this time, another pair of LED's is missing (btw, I'm sorry for messy and low quality photos, I swear it will be better in final entry photoset) For now that's all, now I have to make it while the snow is still here!