What range do you get from that brick?
Are you gonna be making your magic pwm manager available to the community?
Range is detailed in my original build post . . .10-12 miles or 17-20 kilometers.
I would need to work out how best to do that, but if there is enough interest then definitely.
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Love the build! Looks sweet! I’m loving the disc brakes as well. It has even crossed my mind recently to add that to my build. We will see.
I think your Magic PWM manager is a fantastic idea. I have been worried about any of my friends trying my board as it is hard to describe how sensitive these controllers are until you actually try it yourself. That along with the crazy amount of grip and torque as I found out by stacking it hard the first time lol.
I don’t know how it works but would it be possible to have 2 control knobs, one to control max speed and one for ramp up/ramp down aggression between throttle states? Sorry I’m just thinking out loud, its just got my mind thinking…
Really good work btw!
@EssEnn I guess you need to think of the one I built as a prototype . . . you are on the right track regarding having a setting for speed an another for the acceleration/braking curves . . . I ‘fixed’ the speed setting by allowing four modes;
- Pass Through - that changed nothing
- Slow - 50% throttle and ramp up/down curves applied
- Eco - 70% throttle and ramp up/down curves applied
- Fast - 100% throttle and ramp up/down curves applied
Interestingly, I found that different curves were required for each mode . . . and the acceleration and braking curves also needed to be different . . . both the maximum speed/power in each mode and the curves are likely to be personal preference though.
Doing this was easy on my prototype, I just adjusted the software accordingly . . . to make this general purpose and allow individual adjustments to be set requires a bit more thought about the user interface, particularly if the device is to be located inside an enclosure with limited access.
I will have a play and see what is possible.
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@DWiskow I keep having idea’s about this so I’m going to just throw them out there if you don’t mind. I just like brain storming but if i’m annoying just say and I’ll shut up.
To have something that was adjustable by the user could you not have a pot like the one below to adjust variables such as max throttle and ramp rate
And then just switch between the 4 modes that would have different ramp curves? Also would it be possible to have the fast mode always start from neutral? So lets say you go full throttle and then full reverse, can the ramping be instant to neutral and then the curve applied during the braking and visa versa?
Are you using an Arduino?
@EssEnn Your instinct is right about ‘starting from neutral’ and that is the way my code already works . . . not sure regarding the use of pots, if the board is installed in a location that is not readily accessible (e.g. inside an enclosure).
Very nice build. Clean simple effective. Post a video!
How are the brakes? I’m thinking about installing some on my mountain board since I’m strapped in and can’t bail if I need to. I almost got hit by a car. Held onto a stop sign for dear life.
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I don’t see any issue mounting pots in an enclosure to adjust parameters. Thing is, can it be done?
I’m totally in helping out where ever I can with this as I think it is a great idea. Do I need to learn to program an Arduino? How can I help? I got loads of ideas at least
Lucky in the UK I can’t ride on the roads or pavements. Well I can but police would not be happy about it and take the board. Not worth the risk.
Still I have been thinking about the brake kit as it looks sick as well as giving an option to stop if things go wrong.
Dude… you guys are freaking me out 
Do these things really just take off, and/or lockup unexpectedly? 
@barajabali Why did you have to hang onto a stop sign?
Really nice work @DWiskow !! I like it! Im not sure i saw a response to the question of whether you are using arduino to control the acceleration? This is something that could really allow friends/family to safely experience an emtb … would you mind sharing your code? Keep up the good work !!
No they’re super reliable it’s just that they need breaks other than motor breaks. The motors will just slow them down to a slow jog but they don’t stop. And you can’t put your foot down to stop
@smudgeUK I am not using an Arduino, but that should be possible. I am using a 32bit uprocessor and programming in python
@DWiskow ok thanks for the info. Im not familiar at all with python though at the end of the day, code is code 
maybe i’ll look into the arduino project once my current project is complete.
Keep us updated with your progress, this sort of thing is really interesting!
I can see wheelie control and launch control coming in the not too distant future 
I thought it would be an Arduino as it has a RC servo library already (I did a little research after reading this thread) and there are a few easy ways to read the inputs it seems.
@benjammin there is a lot of torque, a 6:1 reduction and a lot of grip. Its not hard to have the front of the board lift up or just shoot out from under you. Mine does not accelerate, it just changes speed almost instantly. Its quite easy to squeeze the trigger a little too hard or hit a bump and before you know it you are looking at the sky.
@smudgeUK there are a lot of possibilities with something like this. You could even put sensors on the front wheels and have some kind of traction control.
@DWiskow I’m loving your idea. Please keep on developing your little box!
What signal is sent from the receiver to the esc? is it 0-5v?
*Edit - i dont want to hijack your build thread @DWiskow - if you’d prefer us to discuss this elsewhere id be happy to make a new thread
So what brakes are out there for a trampa besides magura? Since holding on to a stop sign seems a little painful… plus that means we would need to wear a jock strap too just in case…
Are there any options for a channel 2 operated disc brake or something? I could see having the wheel on the GT2B or mini remote working the brake for full stops or emergencies, and trigger for throttle control.