Lego Technic Powered Up 3 Speed Automatic Car

This video presents a new lego technic 3 speed automatic RC car. The gearbox uses the lego technic powered up hub and 3 motors to drive, steer and switch gears. The car's 3 speed automatic gearbox has 3 forward speeds with gear ratios 1:1, 3:5 and 1:5 and has been programmed using the Powered Up app on an iphone to automatically switch gears based on the torque measurement on the output axle of the powered up XL motor.
The car is put to the test by driving into barriers and up a ramp to see the automatic gear switching in action.
Check out my Gearing Ratio Calculator tool on technicbrickpower.com
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#technicbrickpower #legotechnic

[@SeconYan]

after 42099, I knew the new motor could measure the speed. I wondered a AMT gear box that day. I inspired so much, thanks.Well done.

[@EmbracingTeReoMaori]

When you pulled that app out and started using it to move the motor that blew my mind. True I am a techtard, but that's still impressive.

[@jinpingthebear110]

Literally only reason why I watch your videos is the funny australian accent.

[@TechnicBrickPower]

Haha I like it! As long as you're entertained I am happy! 🙃

[@autisticChronicles360]

That LEGO Technic Powered Up 3 speed automatic car looks awesome!

[@TechnicBrickPower]

Hi there - thanks for that - it was a bit of work but a lot of fun to make. 🙃

[@alexanderfernandez1445]

Awesome work!!!
I would like to see a video with the fully assembly process and listing all the parts, so we can replicate it.
Thanks a lot.

[@thorbjrnhellehaven5766]

Would be cool if you made a variable in the code for gear-status:
0=unknown/shifting/neutral
1,2,3 = current gear
-1 = reverse
Then add a "speedometer" on the display.
Or use the actual number from gear-ratio

[@Jayderzomb]

If you could detect the motor for the drive turning off (I’m not that informed if this is possible or not idk), then technically a good idea I think to fix the car driving back a bit between the gear switching is as follows:
Detect what the tilt of the power up unit is.
(I remember one of LEGO‘s off-road sets had that feature) if the data suggests it’s hill up like in your test, and the motor is off due to low rpm shutoff, activate some brakes in some sort. Maybe some rubber peace directly in contact with either the back or front wheels. Or just block the drive output of the gearbox to a overload gear (the white one) with a small „brake gearbox“. But in honesty I think there are countless ways to build such thing that makes the desired outcome.

[@TechnicBrickPower]

Hi Jason - thanks for those ideas - someone suggested using a worm gear to prevent roll back - probably the simplest solution but confident many others exist. Yes you can detect the slope of the PU hub and maybe use that also.

[@fat_cat8457]

Just be patient and consistent and this quality video will get you thousands of subscribers and millions of views. Keep up the good work!

[@TechnicBrickPower]

Thanks LOL it would have happened by now if it was LOL

[@pedrogameiro3161]

Wow, what a awesome work buddy!!! I’m still beginner within the powered up system thus I’m trying to learn the coding, especially for the automatic transmissions. Could you advise a video or reading source where I could learn the coding you presented? Thanks a lot

[@TechnicBrickPower]

Hi Pedro, I will make some Powered Up coding tutorial videos sometime! 🙃

[@FlackieBlue]

Can i have a version with slightly smaller wheels

[@yanisler3808]

Dude can you show the code screen clear and big? We really need that. I watch this video for tutorial but I cant see the code screen. So how can I learn? Please help and show the code screen. Specaliy reset gear button.

[@icelollypoppy1668]

Could a worm gear stop the slip back while changing gear uphill ? And maybe add something on the app screen to indicate which gear you are in. Thank you for sharing this.

[@TechnicBrickPower]

Hi Yes that's a good point - it should as it can't be driven in reverse. Might try that idea sometime - thanks for sharing.🙃

[@sego_bran]

An awesome powered up MOC!!! Can you upload a tutorial on how was it programmed?
Or how was the calibration for the gearbox programmed?

[@TechnicBrickPower]

Hi Brandon. I think I will do a tutorial video on how I coded it. 🙃

[@sego_bran]

@@TechnicBrickPower Awesome!! Can't wait for it! And more MOCs😁

[@t1g049]

Is it possible to change the gears from going lower to higher? Couldn’t you achieve”fast” speeds that way?
Like:
Gear 1: 1:1
Gear 2: 2:3
Gear 3 1:2
It shouldn’t take to much torque because u would already have momentum.
Maybe I am wrong do, if so please correct me😇

[@TechnicBrickPower]

Hi yeah that's how normal cars work. With Lego you generally get your top speed straight away due to how electric motors work (they just have 1 unloaded top speed and then slow down with more torque). So generally you have to switch down rather than up!

[@juancarlosquesada4243]

Hi. Can you put instructions about building and coding, please? It's a wonderful job

[@TechnicBrickPower]

Hi Juan, Yes I will sometime on rebrickable.

[@user-zy2nu7gk6i]

@@TechnicBrickPower I can't find it

[@adrian_zombturtle148]

Wish you would of drove it over real terrain like carpet or grass to see how the gear switching would of been in practice

[@MaxBrix]

Yes!

[@TechnicBrickPower]

Hi Adrian, Good idea! Will do that sometime. 🙃