Is ti possible or am i asking for too much
i am so sorry i am writing for first time in a forum for arduino, the range of p is 0 5000 maximum, i didn t know how to measure rpm with time so i think i will do it with millis . The other program is for measuring voltage (and i want t add rpm) to a curtain current . For the sensor i didn t find a code so i am attaching a photo ,thank you very much and am sorry for mistakes.
exactly i will make a white spot to reflect the light , i want t use ir because i think it is easy and i only want the spot , the optical need an extra round thing to measure the slots . i am sorry for my bad English
i believe the white spot will be seen by the ir as a change to the out put. i dont know how the ir is working on the arduino code i know the light emitted from the one led is reflected and received by the other. in other projects i have seen i cant understand how it works.