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Hey Megabobra! Thx for the updated code. I'll update it. 2nd: I rode for over 200km with no issues. Found the sweet spot for my myself winded coil magnet. No diagnostic errors anymore! I'm riding with a bigger smile. 🚀🚀

First of all: it works nicely :) Sunday I rode 40km on my local trail. I had 1 hic-up, but I think the electromagnet shaked to much. In my app I'm getting an error 523005 "weak signal", but the motor still works great. This morning I rotated the electromagnet towards the motor. Because of lack...

I think I make the electro magnet myself like you did. What is the diameter of the enameled copper wire? And a resistor? I can see it on you pictures of your homemade magnets 😃 Thanks again🚀

Device seems to work now with the lowpower 12v output motor. Now find a way to get magnet between the motor and frame. 🤨 Looks like your Voima has a different shape....maybe if I take the battery inlet out I can squeeze the magnet in. Or find a smaller magnet. To be continued😃

First I've got a 5V magnet, so thats ok. Second I wired the Arduino up with your written attachement of the 2n222: base > ground etc. But nothing happened. Then I saw in your figure that the transmitter was attached differently: emitter is magnet, base is pin 3 and collector is ground. And it...

Hi there, I've soldered the parts to the Arduino. Uploaded you code. But no action 😏. If I pass a magnet aside to the reedswitch, the electro magnet should work right. It should lift up some metal. I use a usb to power the arduino nano every.

12V electromagnet is around 80 Ohm

So input battery on Vin and GR, like wise 12V electromagnet? Including resistor.

Great! Thx for the tutorial Megabobra. The output of the battery is 12v and if I find a electromagnet of 12v (which there is) there's no need of a voltageregulator right? Like you've said one less component.

You've got also a sensor inside, but your bike manufacture decides to use the external sensor. But once decided, Bosch programs the firmware in or out. So you cannot change that afterwards.......

Same as the normal tuning devices ;-)

So the strength/force of the electromagnet cannot be to strong ;-) Smallest around 3 kg?

Hooray!!! Cool. The bike manufacture decides if you're riding with a rim magnet or spoke/discbrake magnet. In your case, tuning is easy. A tuning device between your "outside" sensor and input leftside Bosch motor. Even with the smart Bosch motor. But in my and Megabobra's case, the speedsensor...

But I guess the Bosch speed sensor should also work right? The only thing that wonders me is that Bosch recommends different magnets with different type of speedsensors. Smart slim sensor must have smart magnet. Something with the strength of the magnet? Or a sellingpoint? 🤨

Great! Looking forward to it. Btw did you use a 3rd party reed switch or can I use the smart sensor from Bosch? I already got that, because I was thinking of use the normal speedsensor instead of the rim version and then a tuning device. But yours is way more simple like you've sad. The magnet...

Hi there also from the Netherlands ;-) And what? Also riding a Voima :) Great solution Megabobra! Not only for the Voima offcourse, but we share the same bike, that's what we got in common. I'd love to read your tutorial about setting this tuning device. Do you use the original Bosch sensor as...

I would love to see your tutorial 👍