A-Tech Hello Sir. First of all It’s a great Job. Very clear video. I have only one question why reverse is so slow and is there any why to increase it? Thank you so much.

@@zeko120 hi, im not too sure whats going on with the reverse, as soon as i know and get it sorted i will share it, thanks

​@@A-tech Hello master! I looked at two parts of your video yesterday, and today I redone the gyroscooter with the firmware presented. As a result, it sometimes does not work stably with potentiometers, and as already noted, the use of DAC is required. I will also note a slow and insecure reverse. But he definitely is:) If you 're a firmware author for stm32, I have a question: Is there any firmware for implementation of the three H-bridge for brushed dc motor throught one hoverboard mainboard? I 'll follow the project closely! Certainly a great job has been done!

@@igormorozov6801 Hi yes DAC does make it a lot better, the reverse is really slow i know, i havnt been able to fix that yet. i like your idea for controlling dc motors with the mainboard but im not sure if its possible. Thanks for your nice comments its very motivating to hear them, thanks

@@A-tech hi, thank you so Much! i'm making a motorized chair for my dad! I really liked the project! does this code work to control the wheels correct? can you make available the last code you used to test here? Thank you again.

Great to hear!

It dosnt work with me I dont know why With out ardiiuno

ok great they will be out soon, thanks

good to know they help, ye haha

ok, do you mean a 2 axis analogue joystick? because they self center you would need to map the values or maby use some resistors somehow, hope this helps

@@A-tech yes 2 axis analogue joystick.. voy a intentar map para controlar forward and reverse.

ok i think you will need to use an arduino, hope this helps

hi, thats a cool idea, they are pretty powerful so probably, just a bit big in size

hi, im planning on a part 3 version to show other controllers, they do make good skateboards because the wheels are so big, they go over cobbled streets and bumpy tiles no problem, thanks

hey, i am building a diy onewheel by combining 2 hoverboard motors, have you tried building a unicycle? Sounds like an interesting project

hi, yes you will need to make some alterations to the outputs, instead of writing to the DAC you need to write like you would to a servo, then an rc transmitter should be fine, i wasnt using an rx wire in my setup, i think thats only if you are using serial communication, thanks

I Solved it! thanks! now I am into the nunchuck control now!

hi, i looked into it, it might be easier using an esp32, they have bluetooth and built in DAC

I dont think so, thanks

ok not sure if you have sorted this now, what firmware you are using is the wrong one and just does test mode, you may be able to change it but i think there are lots of different versions

hi, there is a way, but im not sure how to do it, thanks

hi, yes if you do the speed potentiometer past the stop point it will go in reverse

i dont see why not

ok i took a plug of an old side sensor board and just wired the ends of that

hi, they usually spark as its charging the capacitors, i use a switch so its a bit better, do you have another battery to try in the suspect board? what are you making? thanks

hi, at the moment only about half speed but full speed would be good

ok they are just 16mm shaft support brackets, thanks

may i recommend using a different firmware?

@@A-tech yes. sure

hi, thanks that means a lot, apparently they can but i think you need to edit the firmware file to enable it but not 100%, if you need to use rc stuff i know you can run that through an arduino if that helps, thanks

hi, i dont see why not but you would need to set up a balance sensor and an arduino or something similar, thanks

hi, haha if it was that easy, im not sure if thats even possible with both the wheels being sensored, you can control them both together, with the 2x potentiometer method one does the speed and the other is balance between the 2 motors

hi, still havnt tried it yet or the braking, i will try and do a part 3 video soon

i dont know sorry

Not possible

hi, the usb shield clips on top yes, it also has output pins on it like the arduino, it uses some pins (9,10,11,12) for usb functions but all the others are free i think, the DAC run through I2C so that makes it even easier, im my case i have a sensor shield on top of the usb shield, this just makes things a little easier connecting, so just to round up, its arduino board, usb shield on top, then a sensor shield, then the DAC connect to the SDA and SCL pins for the I2C, hope this helps, thanks

hmm, it could be a broken wire that is not always connected? its hard to say, you may be able to test different parts with a meter to pinpoint the issue, thanks

hi, yes arduino uno is fine, i think i have had these running off a few different arduinos, as long as you set up the DAC in the code it should be fine, i have another video about using a ps3 controller with arduino, you will probably find that helpful, thanks

i dont think so, thanks

@@A-tech thanks for responding and if you do find a way please let me know

10k

Yes, of course

hi, i tried the serial way and there was a problem if the arduino crashed the robot would keep going so i had to use DAC instead for an extra level of safety

hi, thats good, yes i dont see why not, thanks

hi, apparently it does yes but im not sure how to do it and from what i have read it isnt as reliable, thanks

hi, its hard to say in a comment, but it would need data from a gps and or sensors or lidar, and be able to adjust its route depending on what is around it, i will be making one eventually but im not quite at that level yet, thanks

they are just 16mm shaft support brackets

hi, its the same code, just using the arduino allows you to offset the potentiometer values, there are lots of people who have put things online, blogs, projects, some of the github libraries have detailed records of their projects, hope this helps

Yes, you can

hi, ok there are 2 pots, one does speed difference, the other does speed for both, so for reverse you just turn the speed one down further than when its stopped and it will go backwards and bleep, for example the 1024 pot value would be something like 0-300 = reverse - stop, 300 - 1024 = stop - full speed, do for your DAC if you are using one you need to split it like that if you are controlling forwards and reverse with 2 buttons / sticks. Apparently the battery charger does still work, however i am yet to test it. Max speed depends on what firmware you are using and if you change stuff in it, the fastest one i have tested myself is the bobbycar version, it has a speed setting you can set when starting up, i think with a 12s battery it can get upto 30mph, its a feature called field weakening, there is more info on this online if you google it, i just set it in the firmware to run off a 10s battery and its fast enough, maby 20mph. There is a guy who hosts an online firmware compiler that i have used a few times, you can edit the code online, compile it and download the .hex file to upload to the motherboard, here is his channel: kzfaq.info/love/LUfNuoSML-vkLYiO0vBUHQ, hope this helps! thanks

@@A-tech thanks for your reply, I'll try it.

10k, thanks

just a standard 10k

hi, i think you would connect it up the same way as a potentiometer, you may need to adjust it somehow so it can stay in the middle, hope this helps

@@A-tech or you could put an arduino ( maybe pro micro, it's very small ) and use it to map the ethrottle using an ADC like in the video.

hi, there should only be 1 board, thanks

hi, im not sure i dont have one of them, is it a rc receiver? i did it with a futaba and a dumborc with good results

hi, yes i see what you mean, i didnt notice that, thanks

hi, if you dont need steering i recommend the 'bobby car' version of the firmware, this makes the wheels go the same speed and has 2 throttles, one for brakes and one for speed, it also has different running modes, so you can have a fast mode which is about 20mph, on my video where i convert a mobility scooter into a go kart this uses the bobby car firmware, hope this helps, and thanks!

@@A-tech thanks

yes, arduino and 2x DAC, thanks

hi, did you get it sorted out? i dont think we need to change any values just upload the new software and should be good to go, i would like to set up a discord for this kind of thing but not sure how it works, thanks

hmm, its hard to say, if you get this working with a potentiometer then swap the potentiometer for the pedal and see if it works, there will be only low voltage going through the potentiometer

@@A-tech I thought 1 pentiometer and 1 pedal I also ordered the reprograming thingi

ok great good luck

hi, i cant say yes or no, but if it works like a potentometer then it should do, you may need to map it with an arduino

i dont think we can, thanks

hi, i tried spi once and it worked well until the arduino crashed and the motors kept going, you just have to put extra safety stuff inside, thanks

im not sure about ps4 controller

And what arduino did you use (the one in the picture ( 8:35 ))? Or can I use my normal Arduino? (www.amazon.de/dp/B01EWOE0UU/ref=sr_1_7?keywords=arduino&qid=1583182710&sr=8-7)

hi, that was just a joke, its really not a way you should control a potentiometer, ok the controller is a ps3 controller connected via bluetooth, you will need the ps3bt library, hope this helps

that one is an arduino uno, thanks

A-Tech so I can also use my Arduino which is also an Uno

@@relatedl35 thats it ye

hi, is this for the sensor cable? so there should be red, black, blue and green, for yours you have red, black blue and white? thanks

i think you can yes but i have never tried, i will make a part 3 video soon with e bike controller, nunchuck and rc receiver, thanks

hi, im planning on doing a firmware hack part 3 video, this might be included, thanks

hi, yes you just leave the steering pot in the middle, thanks

hi, yes definitely, the throttle should have the same control as a potentiometer would

@@A-tech great thanks, just need to work out how 😂😁 I guess it's just connect, nope I don't know

with the throttle it should come with a wiring diagram, they are basically a potentiometer with a lever on them

hi, do you mean like an RC receiver? im sure there is a way to do it direct, you can do it with an arduino which might be easier with the mapping of the throttle and steering ranges, the DAC is pretty straight forward, they use i2c to communicate with the arduino and need a 3.3v input so they only output 3.3v max to the hoverboard, does this help? thanks

@@A-tech Yeah I want to an RC receiver, there was a custom firmware to make it work directly but I could for the life of me get it to work. I am very new to Arduino so I'm not sure what pins to put the DAC's according to the code on. A wiring diagram for the DAC's would be awesome. I know I am asking for a lot but just a look over the code to see if my implementation for the pwm is correct. Thanks for the reply.

ok im not sure, havnt done much with rc receivers and hoverboards, arduino pins for the i2c communication are named SCL and SDA or A4 and A5, im going to do a Firmware Hack part 3 video soon so i will make sure to include that

@@A-tech That would be so good. Thank you. I am building a driving esky. Already got the frame and everything built and just trying to get the electronics to work. Thanks once again!

you could try using a servo with a blanking flap?

@@A-tech I forgot to add 1 wheel failed to run but think it only needs 1 sensor then it looks for the level sensor is it a accelerometer I have to tilt the PCB for forward and reverse also speed control mmm There's a bit of damp and corrosion on that PCB .... I've checked few components aiming for SMT capacitors capacity of the one was below 2uf and the rest was 5uf would that stop it from moving mm

@@davey2k12 ok yes thats right i think it does only look for one pressure sensor, im not sure if it would stop it moving, but corrosion is usually bad for a pcb, do you need to tilt both sensors at the same time?

@@A-tech oh yeh maybe that's why only 1 wheel runs board might be trying to turn one way mmm, might be 2 accelerometers on each PCB working independently for steering good call bro 👍

@@davey2k12 I think so yes, im pretty sure when i rode one before you could tilt one foot and only that side would move, no problem

hi, is it the same motherboard as the one in the video?

esp32 has 2 built in DAC??

@@A-tech Yes ESP 32 has two 8 bit DAC... I tried the above code it works..

@@A-tech that's right friend, it is a method that makes things a little easier, thanks for inspiring me

hi, the main reason for the change was they are so much cheaper, the flipsky ones are about £50 each and that does 1 motor, the hoverboard ones are around £20 each and they do both motors and also handle the charging of the batteries, all connectors are already fitted, and the flipsky ones can be tricky to set up, none have been used with encoders only the internal hall sensors, hope this helps

@@A-tech thank you sir. This was very informative for me

hi, these motherboards support lots of different input types, pwm being one of them, I like to use the DAC as a safety thing, I have tried serial coms before but the motors would continue to spin if the controller crashed

ok 1 should do speed and the other should do speed difference between the 2 motors

hi, do you mean to set a max speed? find this line of code: "dac2_value = map(set2, 120,0,1600,4095); //forwards" so the 4095 is the number for max speed, 1600 is stop, so any number between them two instead of the 4095 should reduce the max speed, hope this helps

@@A-tech hello, thanks for your reply. I want to increase the max speed.... I have made some test mit motus Scooter. Motus has 350W motor and in our project the motors have 2x540. Motus was faster, greater max speed and so one... So I think the throttle don't give full 3.3v at max load. i have to measure the max voltage of the throttle and adapt the code for my throttle. 4095 is 3.3v?

hi, i have the code that works, im currently using it with the mobility scooter part 2, that is rc, video should be up shortly and i will put the code in with that one, thanks

hi, 10k ones, thanks

hi, oh ye the very very very important thing, if i remember correctly the pins are already soldered together and you need to get a stanley blade or something to cut the link, i think, thanks

@@A-tech Oh thank you a lot!!

hi, i think you would need one to set them to be the same, if none is connected im not sure what would happen, they might go the same by default, you could probably connect a potentiometer to the steering for a bit of electronic differential, i think even with a trike the rear wheels would want to go different speeds, hope this helps

@@A-tech agreed. Just rather not have extra dials a kid can play with. Maybe i mount on steering column with gear to accomplish the differencial when steering. But from what i see in your video this would also mean if steering is turned with no throttle it would still activate which is why i rather not have it at all

hmm that would have been good to include, its a generic hoverboard, best way to tell is by the wheels i think, hope that helps

@@A-tech thank you, I see the generic is usually call Two Wheel Self Balancing Scooter

Hi, thanks but I don’t have any Nintendo nunchucks

hi, i think the different inputs for the board have to be set to a type in the firmware itself, so instead of editing the firmware files and making a different version I went the DAC way, thanks

@@A-tech ok. So you let the firmware untouched, ok. by the way, what do you think about the motor control itself? For me feels a bit noisy... Have you tried using my firmware? github.com/EmanuelFeru/hoverboard-firmware-hack It is an improved controller, with much less noise and vibrations. All the interfaces/connections are the same as in the original firmware. Maybe, it worth trying it. Let me know what you think if you try. PS: I am almost finished with even a better control FOC (Field Oriented Control) which will offer more features. I will post it soon on github.

Hi, sorry for this late reply i didnt get a notification about it, yes i havnt edited the firmware, i tried but i was having trouble editing and compiling so i went with the cube programmer instead of the CLI, is there a .hex file in that firmware folder? would it work me just uploading that onto my motherboards? Please let me know when you have the FOC mode that will be awsome, thanks

@@A-tech You can already try the sinusoidal control with similar setting as the original firmware. You just need to flash the firmware.bin from here github.com/EmanuelFeru/hoverboard-firmware-hack/tree/master/build It is a *.bin file, but it can be flashed same way as a *.hex file. I also released the FOC control here: github.com/EmanuelFeru/hoverboard-firmware-hack-FOC the only thing is that by default the build expects a joystick ADC input (so middle centered), maybe I will put it back as original firmware for consistency.

@@A-tech Same reason I didn't use it, couldn't find the .hex file

hi, i couldnt get a compiler to work on my system, apparently you need linux to do it? im not sure, thanks

@@A-tech Thanks for the quick response! Followup question, are you downloading c code directly and what did you use for debug?

if you are refering to the .hex file as c code then yes and no debug just sent it to the motherboard and thats it

yes you can, not something i have tried but there are settings for it in the firmware code

I'm fairly sure the custom firmware he installed bypasses the one gyro input, because in Part 1 he just cuts the wires for that input.

hi, sorry for the slow reply, yes in part 1 it shows a bit better, you only need to use 1 sensor cable because that does both, the other is just for the leds and stuff

hi, thats great im helping, any questions its edeped@yahoo.com, thanks

hi, which circuit do you mean? the code loop? thanks

@@A-tech circuit as shown in the video. i want it to run faster.thanks

the potentiometers control both motors together, but if you can disconnect 1 motor then yes

how about controlling each motor individually by adding new potentiometer, so that we can control each motor separately? possible?

No that does not work, maby someone can make a firmware that does

Hi, im not sure if it is possible, for the brakes it might be best to use a mechanical brake just in case something was to go wrong, hope this helps :)

OK, thanks. I am trying to avoid doing that. The instantaneous stop is a bit hard on the driver. Getting rid of the heat over 3-4 seconds may be a problem for the control board components. Cheers Ken

im not familiar with the stop you mention, it sounds like an emergency stop, is it with a switch or just when you are going forwards then put it in reverse? thanks

hi, sometimes i just keep adding bits to the code and dont go back to refine it once its working, i really didnt notice, thanks

it could be the battery is getting low?

@@A-tech I thought of that too but I checked the battery and it has 35v I recharge it and I still have the same problem. The motor test does work so I tried another joystick but still the same problem. Is there another easy way I can use as an input instead of the joystick?

@@fabianarevalo2198 yes you could try testing it with potentiometers? i used a DAC with mine so i could map out the ranges, it may because the joystick is always in the middle when its untouched, hope this helps

@@A-tech I tried with a normal potentiometer and it didn't work, it is like if it wasn't even connected. Can the main board be ruined?

@@fabianarevalo2198 im not sure thats a strange one, were you using 3.3v or 5v for the joystick / potentiometers?

hi, is there anything specific you need assistance with? the DACs are controlled through the I2c of the arduino, they connect to the longest sensor cable of the hoverboard motherboard, using the blue and green wires, also dont forget to connect the grounds together too, and definitely dont use the red wire because its 14v, hope this helps

Sorry. But that was not helpful to much to me ... I really need your help . Please can you make one more video ? Please . Only the connection

@@upload58404 ok no problem, could you explain which bits you need help with? thanks

Well. Im trying to control it with arduino and using a sensor which is (IR) or ( ultrasonic ) .

@@upload58404 ok so like with a tv remote? so you see in the video about using a DAC to pretend to the motherboard its getting a potentiometer signal, you need a couple of them, for your IR sensor i would not recommend that because they can only accept 1 signal at a time so controlling would be tricky

could be low power possibly?

10k potentiometer, depends on the throttle

@@A-tech thank you

@@ivanrumenov928 its ok no problem, just make sure its only 3.3v