| 摘要 |
A device for automatic control of illumination intensity of education and production premises has an illumination indicator, a digital-to-analog converter and an analog-to-digital converter, wherein the illumination indicator output is connected to the input of a normalizing transducer, which output is connected to the first inputs of two comparators, and second inputs of corresponding comparators are connected to a digital-to-analog converter output, the comparator outputs are connected to inputs of two independent AND logical elements, which second inputs are connected to a clocking generator output, the outputs of AND logical elements are connected correspondingly to inputs of direct and back count of reverse isolation on-off counter device, which digital output is connected to a digital-to-analog converter and a microprocessor port A, the microprocessor port B is connected to optical isolation units connected to a power supply source negative pole and the lamp outputs, one of port C outputs is connected to an on-off counter device nulling input, and a microprocessor port D input is connected to output of the analog-to-digital converter, which input is connected to a potentiometer wiper. |
