Hi i bought a bike computer https://www.sunding.com/en/productn.asp?ArticleID=1372 and because i have an ebike that means more distance between receiver and bike computer i can get a signal when it is placed where it should be. If i spin the wheel and hold the bike computer closer it works. I means the speed and distance work. It turns on an everything like that. This is the online manual https://www.sunding.com/en/tbc258_upf...5373083141.pdf . The manual that came with it says it is not to be over .6cm away. They didnt tell me that in the ebay listing. I was thinking to set up some type of bracket but well not sure how to do it. Tried a few different things so far. Anyone got suggestions?

You can pick up some rare earth magnets at Radioshack and stack them on your wheel magnet. They are stronger and usually just one popped on will be enough to be picked up by your receiver.
Rare Earth Super Magnets (2-Pack) - Radioshack

It sounds as though the receiver is sensing the wheel magnet, the issue is that the receiver and the bike computer are too far apart. There isn't any way around the 60cm distance limitation except to mount the bike computer closer to the receiver. Wired is probably the right application here, can you return it by chance?

Yeah no its a distance issue

Hi yes. I am trying to put some kind of mount on the bike tonight. Kinda hard to explain what i mean. If it doesn't work i will return it as the seller has said i can if i can find the correct packaging it came with. I found my old wired bike computer the day after i received this one too so that is good.

Fortunately the ebay seller refunded me and i returned the item. Ended up finding my very cheap wired bike computer at the bottom of my bag so thats back on the bike. Wish i could find my really good computer i have had for years. Ithink thats gone to bike heaven he he

I assume it said .6 meters, not .6cm - 6mm is not very far for a wireless to travel.

In any case, yeah, I would just go wired unless you're willing to spring for a much more up-market model. I personally just go wired all the time anyway, I don't really see the point of wireless, seems like just more crap to go wrong to me.

Wired is the best choice for ebikes. Wireless can be affected by the electronic noise generated from an ebike. Another issue can be LED lighting which can also cause interference.

Oops yeah your right about the typo. Yeah i got mine working. I will probably buy a better wired one when this cheap one falls apart

Oh really i didnt know that thanks. Oh in what way does the led lighting cause interference? Do you mean one that is connected to the battery as well or a separate one? I have one that is connected to the battery but it stopped working. Dont know how long ago. I preferred to use the little ones with separate batteries as it wasnt draining my battery. So the battery is just for the motor and nothing else

LED lights achieve different brightness levels by pulsing the LED at high frequency (fast enough that you normally would not notice it - a few hundred hz probably) - this is called Pulse Width Modulation (PWM). If the LED is on half the time and off half the time very fast it look dimmer to the eye and uses half the power. The reason for this is twofold - one LEDs do not really dim linearly by reducing the current to them. PWM dimming isn't linear either but it's better. The big reason is that PWM dimming is cheap and easy to do in an efficient way. The alternative is current limiting, which either is very wasteful (dumping the extra as heat) or complex (using switch mode constant current power supplies).

Anyway, the net result is that the LEDs (pretty high power) are being switched on and off hundreds to thousands of times per second. Whenever you have power being switched on and off, radio frequency interference is generated. The higher the power, the more noise. You can shield against it but it adds weight and cost.

ebikes have this problem in spades because they also use PWM for speed control, the power levels are far higher, and the wires and coils in the motors make very efficient antennas transmitting all the noise all over the place.

So are you saying i shouldnt use the LED light. Sorry most of that went over my head but it is informative and interesting thanks