hoverboard firmware: Fauth vs Feru :-) and 10 inch vs 6.5 inch :-/

[@maitenmaiten5039]

was having the same issue with 10 inch motors, it worked well after swaped the Hall sensors wires

[@brooklyn_uav4589]

Thanks a lot for your online compiler great work 👍

[@robertbartelt2812]

Hallo Robo, schau dir mal die Polung der HAL Sensoren an. In deinem Video sieht es so aus, als ob beim 6,5 Zoll Rad die Farben des Steckers zum Board passen beim 10 Zoll Rad aber nicht. Evtl. ist der HAL Sensor unterschiedlich belegt.

[@robodurden]

Yes you are absolutely right :-) After i connected the the motor phases differently the 10 inch motors now run as smoothly as the 6.5 inch versions. Indeed there is also a color mismatch with the hall sensors connector but the motor cables needed the third color combination to make them work. Thank you very much !

[@aerdronix4634]

Nice Video Robo! Thanks for sharing it! The 10 inch motors behave like this (also mentioned in the last comment) because the Hall sensors or motor phases wires are mapped differently. I also see in your video when both motors are opened, that the wire colors for the Hall sensors between the two motors 6.5" and 10" are not the same. I have the 10" motors on my Hovercar and they work equally well as the 6.5" (see Hovercar video here kzbin.info/www/bejne/f5irdJagZbOajbM&t= )

[@du4-fpv777]

I'm pretty sure the hall sensor wire order doesn't matter. I bet there is something to do with with magnets and polls. But that's just a guess. I do know that hall sensors don't have to be in order.

[@mumixer]

Hi. please tell me where I can find information or a diagram for connecting potentiometers . When I flashed hovercar my Board beeps in a low tone and I can not make it work. Help please. I will be very grateful for any help

[@robodurden]

github.com/NiklasFauth/hoverboard-firmware-hack i think ADC1 is steer and ADC2 is speed. Only 3.3V to these cables !!! I think best is to take a 3.3 Volt regulator connected to the 15V red cable. Board beeping might be because firmware thinks that battery voltage is too low. If you are using a 24 Volt battery than change the 10s to 7s in the config.h

[@mkr32]

hi sir my hoverboard each side single bldc moter how to control with potentiometer which software i can use please guide

[@darexg]

Great video? Did you compare stator width? Some motors have 25mm, some 30mm. Maybe this has something to do with this isue. I think your 10" motors has narrow stator/magnets.

[@robodurden]

you mean the height of the stator or the length of the magnets ? No i forgot to measure this and already have put all the parts together again. Maybe i will open issues at their githubs, Niklas and Emanuel should know best why the 10 inch motors have such a strange behavior.

[@kostassimelidis]

Hello Robo! do you have any video tutorial to help me successfully connect the serial UART output and get the values for the voltage calibration?

[@robodurden]

connect uart would be one of my beginner videos. i never was in need of voltage calibration ..

[@hopek1986]

Hi its possible to set more speed on Efru firmware with 36v? Got an diy electric gokart for kid and max speed on 12 inch wheels is 17km/h. Changes in config.h dont work.

[@robodurden]

Another stupid fun project :-( Try field weakening. Can boost max speed by about 25% . Stupid fun projects :-( Stupid people.

[@hopek1986]

@@robodurden could you explain what you mean by stupid fun project?

[@robodurden]

Building something to have fun.

[@fulvionani5577]

Hello Robo! Thanks for all your job!!! I saw you connect only a 220kohm potetiometer but I don't understand how is the wire diagram. I already tried with 2 pot with the Niklas firmware and it works. Thanks!

[@robodurden]

for my 4-wheelers i only need speed, no steer. So only one potentiometer for the speed adc.

[@fulvionani5577]

@@robodurden thanks for the quickly answer! I have a 10" wheel hoverboard; what about the motor phases? (referred to your answer you gave to Robert Bartelt)

[@robodurden]

@@fulvionani5577 simply try all color combination until one works smoothly. I have been thinking.. i could turn www.pionierland.de into an expert forum where all you tinkeres can register and select how you can tribute to the hoverboard community: 1. which firmwares you have successfully tested 2. which use cases you have succeeded: wheelchair, 4-wheeler, recumbent bike, wind turbine, water turbine, hoverboard, etc. 3. what special features you realized: recuperation/electrice brake, etc. 4. what control methods you successfuly implemented: ppm, serial, adc, etc. 5. would you accept paid jobs ? That could become a worldwide expert community.. And with car companies desperately searching for programmers, this forum could be a career starting point for all of you. Would only take me a day to set up a futuristic forum with my oo-database, see for instance www.scriptdoctors.org. And then i could run a USD 500 Kickstarter to rent another v-server for $4/month only for the online compiler. Right now i only allow only one compilation at a time because i use that vserver for other things too. With all the different firmwares and different control types, an expert forum in addition to my online compiler could become a very fruitful place - that even could make the world a better place. So will you back my Kickstarter campaign with USD $10 within the first 24 hours ?

[@fulvionani5577]

@@robodurden It could be a good/interesting project!

[@robodurden]

@@fulvionani5577 that was not my question.

[@automacnc86]

Hallo. Firstly thanks a lot for the good work. If I may ask, I am currently building a small kids car for my son using hoverboard motors and controller. I like Eferu's FOC control hack. I will be using PWM variant for remote control, is there any way to measure the rpm of the motors? I could use an Arduino and Nextion HMI just for speed display purposes. Thank you.

[@robodurden]

Choose a Variant_Uart and connect an Esp32 S2 Mini to read and control the hoverboard.

[@automacnc86]

@@robodurden Never worked with ESP's before, thanks anyway.

[@khanatifali1800]

Can you share your experience with wheelbarrow 16 inch diameter wheels. how much weight it can carry if we use 4 motors. Is the torque enough to carry two persons with 100 kg frame.

[@robodurden]

I have built a prototype with wood and 4 motors to test a new steering mechanism. Only powered the front motors with 7s 25V and accelerated flat to 20 kmh. The tires are not made for such high speeds, so the car started vibrating.. be as precise as possible. You can calculate the torque Nm in the third formula of www.torcbrain.de/drehmoment-und-leistung/ Uphill the motors should make about 12 RPM at max power. At 25V i experienced about 200 Watt power output. So with four motors you get 800 Watt at 300 rpm and therefore a torque of 25.46 Nm. A 40 cm diameter wheel has not a lever of 1m but 0.2m. So the car can push upwards with a force of 5* 25.46 = 127 Newton = 12.7 kg. With 10% uphill you gain 10 meters height with 100m driven. Make a drawing of the forces and you can see that the car can pull only 127 kg uphill. 6% uphill would be 12.7/0.06= 212 kg. With 36 Volt and 350 Watt you would get 36*12 RPM and 4*350 Watt, so a combined torque of 31 Nm. Carrying 310 kg at 10% and 517kg at 6%. Max speed at 36V would be 14 rpm/V * 36V / 60s * pi * 0.4m * 3.6 km/h/m/s = 38 km/h :-) Send me an email if you indeed will build such a nice car!

[@khanatifali1800]

@@robodurden Great thanks I will email you.

[@robodurden]

@@khanatifali1800 I have answered you two days ago. You maybe look in your spam folder.

[@khanatifali1800]

@@robodurden Thank you very much my friend for your detailed reply. I was badly ill I will give you all details today by email.

[@automoto95]

Hi does that hoverboard controller can handle 48v 13s battery? i have that foc firmware does any setting must be cheange for that battery?

[@robodurden]

Please test and report back here :-) I would also like to use two boards with a 16s Lifepo4 battery. The usual MOSFETs are rated for 75V and the input capacitors 63V. But you should add active cooling to the aluminum back plate. Maybe even water cooling is needed. Or replace all 12 MOSFETs with ones that have a lower R_ds_on. In the config.h you have to increase battery cells from 10 to 14. There is also a setting for max current that you should increase, otherwise the board will not allow more power. I think that Niklas Fauth tested 12s as the maximum because more power will simply melt the motors! In my setup I have 1000W motors from attached so the risk for me would only to burn the controller boards.

[@automoto95]

@@robodurden there is any controller temp limit protection default enabled on foc formware? or is there any thermal protection of the board in config.h file ? i won't to burn my board

[@robodurden]

@@automoto95 You don't seem to have any deeper insight in programming or electronics, so if you don't want to risk anything, don't do anything. You should have searched "temp" in the config.h .. "the sensor is inside the STM/GD chip.", so this will not really help you when the mosfet burn. Try or die.

[@automoto95]

@@robodurden ok i found that thanks

[@josem-proyects6042]

hi, robo durden, am making a ebike with this system, is almost finish, but my st-link device dont connect, do you can tell us some tips for connect the st -link to a mainboard for a very first time?

[@robodurden]

read the github page of Niklas Fauth and watch my tutorial kzbin.info/www/bejne/Z2a4c3WZj9uAnpo If nothing works, try the usb dongle with a blue pill to see if that works. And post a video of your ebike !

[@josem-proyects6042]

@@robodurdenthanks robodurden, well i am waiting only for that, to finish,, am seeying your videos seconds by seconds for catch details in the connections, do you can helpme with some tips for connect the st -link to a mainboard for a very first time?

[@josem-proyects6042]

@@robodurden the bluepill stm32, connect very good with the st-link, but the st-link with the mainboard no,, i have 2 hb, the 2 have the same prob. and originally with normal assembly working good both hb

[@robodurden]

@@josem-proyects6042 i fear i can not help you. The battery voltage should be 36 Volt and the on/off push button replaced with a short cut jumper. Then only to connect: gnd and the two program pins. I will make the part 2 on hoverboard repair tomorrow and will again propose an expert system where you could find more help then simply asking me. So i expect you to write a comment in that video.

[@josem-proyects6042]

@@robodurden Very thanks robodurden. I will be active to se that video for see more details to my proyect. And soo the connections, the 36v is connected, the jumper too, and the 3 cables from the st-link too... but i was seeying in the niklasfauth link, this part that dont understand says this: openocd -f interface/stlink-v2.cf""

[@shpixi]

I cant find .HEX file into EmanuelFeru folder - or should I do learn something else? (am exploding now)

[@robodurden]

Be happy, not aggressive. There is no emanuelFeru folder. When compilation fails there will be no hex file for download.

[@shpixi]

@@robodurden 😅😅😅 - that's what I figured it out, "to learn how to compile" kindly please would you be nice and in short explanation just tell me where to start learning for "compiling"? 🙏🙏🙏

[@robodurden]

Sorry no. Watch my absolute beginners tutorial and the ide video. When you can name a specific problem I will try to help. But I will not do your work.

[@geofrancis2001]

I made a 3d printed wheelbarrow tyre adapter and put it on thingverse. so you can use big tyres with small hoverboard motors.

[@robodurden]

link to thingiverse is missing. Or at least your user name over there.

[@geofrancis2001]

@@robodurden youtube is deleting my replies.

[@geofrancis2001]

@@robodurden its called Wheelbarrow Tyre 3.50-8 adapter for hoverboard.

[@robodurden]

thingiverse.com/thing:6657711 . Yes i have a coreXY with 30x30 cm build plate to fit your adapter. Print time over 24 hours. What is the volume with solid print ? Looks like half a kilogram :-/ You should a 5mm height slice of the middle to test that the adapter will fit in the end. The outer diameter of hoverbaord motors can vary for +-1 2mm. the ones with 30mm magnets are a bit bigger then the 25mm. In your case you only have 20 mm magnest inside, i guess by the Merceds star on the side of the motors.

[@geofrancis2001]

​@@robodurden I found the motors with the stripe were a couple of milimeters smaller but it could be fixed with a couple of strips of tape around the hub. the flower and star motors are the same size.

[@automoto95]

hi does did you know where i can find to download stock hoverboard firmware to go back to the normal hoverboard functionality?

[@robodurden]

There is no stock firmware. But some github firmwares offer hoverboard. Check Emanuel Feru or github.com/bipropellant/bipropellant-hoverboard-firmware

[@automoto95]

@@robodurden thanks for that.

[@automoto95]

@@robodurden i can't find the single .bin file to flash of the bipropellant-hoverboard firmware where i can locate it?

[@robodurden]

@@automoto95 You have to compile the firmware yourself. You can use my hoverboard compiler for that: pionierland.de/hoverhack/

[@sekitolekojolly9156]

Hey boss i need ur help with firmware

[@robodurden]

I don't respond to one liners.

[@paoloesposito4419]

Ciao, complimenti per i tuoi video, ti seguo dall'italia!! Avendo windows 7 sul mio PC non riesco ad installare l'applicazione stm32 utility! Come posso fare? Mi piacerebbe collegare un acceleratore, grazie in attesa di una vostra risposta vi porgo i miei cordiali saluti grazie Paolo

[@robodurden]

search google for: "windows 7" stm32 install or: "windows 7" stm32 install problem

[@javadjj3917]

How can we ask a question from you? i saw some of your videos about reusing hoverboard motors. i want to use the motor as a sewing machine motor. it needs a pedal. can you help ?

[@robodurden]

If you have a code/firmware problem ask here (start a new issue): github.com/RoboDurden/Hoverboard-Firmware-Hack-Gen2.x/issues Sewing machine does not need high torque so you should be able to drive the sewing machine directly or with a 1:1 chain or toothed belt. Sounds like a nice project and not yet another stupid fun project.

[@javadjj3917]

@@robodurden thanks