Thanks very much for checking Ashley, that's great news! 🎉🥳
And also good to know that the original speed sensor gets on well with the Arduino. Are you going to be using this setup going forward? I'd be keen to keep in touch to see how it's going after some km's.
Hi Mervious,
Sounds like you've added a few too many ohms to your coil! While I never got the 'field too weak error' I have seen the speed fluctuation before. It was always to do with the coil placement. In your case it's probably more around the coil resistance. At first I suggest leaving the...
Hi M,
Thanks for the kind words. There have been a few people with a similar question to yours. Yes, I believe the Mega will work with a traditional speed sensor setup and magnet on the disc or spoke. But sorry, I can't confirm it as I simply don't have a bike to try it on.
The setup would be a...
Hi Mav, no worries I'll add you to the list.
For GPS, simplest is just to turn off location services in your phone. If you do want to use GPS for another purpose while riding, for Strava or something, just ensure you don't grant Flow access to it. Does this help?
Think I got this sorted out to allow Ride screen access without location. You need to grant location access to Flow app, I set mine to 'access only when app is running', BUT leave your actual location service disabled. Seems that the app only checks that it has access priviledges, not that...
Terrific thanks. I'm using an S21, so I wonder if it was just the app I was using... I'll give it another try with the one you mentioned. Thanks for the tips!
That's outstanding, thanks Mervious! I had tried to do this early on in the project but I only had my phone to take the measurement. Needless to say it wasn't accurate... and in fact whenever the reading was too high, it would somehow temporarily wreck the phone's magnetic sensor such that it...
OK final update on this. I'm not sure it'll be possible using the PWM output. This output is still digital, where it just adjusts the duty cycle (time spent on vs off) of that output in order to present a varying voltage. For example, for a 5v output pin, to achieve 2.5v output the duty cycle is...
Yes it'll definitely do 5v but there's very little current behind it, only enough for an LED or two. However, it does look like a slightly different transistor does allow a proportional output: TIP120 Darlington Transistor
I'll investigate the use of this. It might be good upgrade to put in...
I'm genuinely very curious to know if this detection is related to the approach with the coil or if it was code related. Half of me wishes it was running the same code when it failed so we'd at least know its limit!
What's your plan now? Are you keeping it in place?
Hi Mervious,
First regarding the winding, 100 turns at 0.3mm giving 3.2ohm sounds exactly like mine. I've got a 6.6ohm resister in place to bring the total to ~11ohms. I think it's more the placement you need to perfect. Its not so much sensitive within 1mm, but looking at your photo, my coil is...
I think though you'd need something which can pass that regulated power along in more than simply an on-off state. At the moment, the transistor can either be on or off, and while the PWM outputs do allow for an inbetween value, they're not able to power the coil on their own. So essentially you...
Very interesting read on the patent. Sadly it'll be some time before I get to the 1000km mark, but yes I completely agree with as much testing as possible is needed . Frankly I'm not in an rush to build devices if there's a risk that they'll behave like this in the longer term. @Sander , I...
Sorry to hear that Koekie. I'm on ~600km on mine - clearly I don't get out as much as you!!
I wonder if the chatGPT approach with the constant ms signal delay contributed to it?
Thanks Ashley, the diagram is correct. I've updated the wording in that post to confirm:
Transistor: Base > D3, emitter > electromagnet, collector > Ground