POV bike wheel with led

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hai, . doing arduino pov 16 led. able light led @ fix position font @ constant speed. facing unable display image @ fix position when different speed ? research , suggested use reed switch or hall effect sensor control the positing, 1 better ?  have done code 16 led display font. combine font positing code led code right ?? have no idea it. please help. alot ~!  :)

moderator. think needs in project guidance not programming.

@yunsheng94

to determine speed of bike, systems put small magnet on 1 of spokes (near outside of wheel), , have sensor on 1 of forks, detects magnet passes.

there 2 mains ways of detecting magnet, 1 if reed switch , other hall effect sensor.
i suspect more modern systems use hall effect sensors more sensitive reed switches.
reed switches require magnet pass close switch in order makes contact.



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