Yeah, i saw Halbach array, but i have only cylindrical magnets now, so there are only two positions for the magnets. What is stronger than N52 ? Maybe bigger N52. There are another device with battery and i want to comunicate with him (thats why i need wireless). Perfect would be 8 pulses in one rotation from RF, 4 pulses are satisfactory, but i will happy if i make at least 1 pulse per rotation. Faster rotation would help, but the average cyclist pedals at about 60 rpm, and advanced cyclists pedal at much higher cadences, from at least 80 rpm to more than 100 rpm. So i can't make experiments with 200rpm for example...Can one coil cover 2 magnets, one of P and other of N ? Will paint few variants of magnets and coils with solidworks for forum members opinions. I have another ring (waiting for bigger magnets for testing).
Need to find correct coils positions, and correct coil sizes. There is AC, circuit requires DC. Another problem how to rectify such low voltages. With shottkey there are about 0.6V voltage drop. Found this http://digitaldiy.io/general-electronics/552-a-no-voltage-drop-bridge-rectifier.html , but I have doubts about that "perfect" bridge.
Need to find correct coils positions, and correct coil sizes. There is AC, circuit requires DC. Another problem how to rectify such low voltages. With shottkey there are about 0.6V voltage drop. Found this http://digitaldiy.io/general-electronics/552-a-no-voltage-drop-bridge-rectifier.html , but I have doubts about that "perfect" bridge.