picpicpikapika WROTE:Hi, I dun really understand...if I am not going to use other colour tapes except black colour one...and the runway for my car has only a black colour tape at the end...according to ober, the infrared intensity of black colour surface and normal rough surface to the receiver is the same...so how am I going to detect this black colour tape since no voltage difference(output voltage of the sensor) between this black surface and my track???
picpicpikapika WROTE:Hi, can I know what are the perfect resistor values for IR receiver and IR transmitter?? I have tried to used 330 ohms for my transmitter and 47K for my receiver, but when I tried to put a pure white paper on top of the sensor the voltage only decreased from 4.5V to 4.0V. Is it the normal result?? I have tried with 4.7k for my receiver, the result was even worse, no voltage change at all when I place the paper on top of the sensor...can I know what is the problem?? thanks
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