- 1 decade agoFavorite Answer
The present topic is subject to a circuit of measuring speed by infrared radiation circuit composed of a AT89C51, CD4584, infrared light emitting diode, optoelectronic transistor and liquid crystal display.
The present topic is purposed to realize basic principles and functions of speed measuring apparatus.
In order to achieve the abovementioned purpose, the present topic mainly comprises a 89C51 chip, which detectes signals of a passing through object by two set of infrared light emitting diode and optoelectronic transistor and calculates time difference of two signals generated by the two sensitive circuits which sensing the signal of object. The signals are calculated to obtain the speed of the object.
Infrared light not only can be applied to the speed measuring apparatus of the present topic, but also can be applied to remote controller, television remote controller and car remote key. It further can inspire creative ideas and applications more than this.
2008-05-19 15:50:34 補充：
The present topic is subject to a infrared speed measuring circuit composed of a AT89C51, CD4584, infrared light emitting diode, optoelectronic transistor and liquid crystal display.