Abstract
In this design, we introduce an equipment ,which is controlled by 51 series singlechip.By this equipment, voltage value and current value are measured using the chip of Analog to Digital Convertor ADC0809. The controlled-voltage value is formed by using the chip of Digital to Analog Convertor DAC0832. We call this equipment E-LOAD.By using this equipment, we can test the output
Level of some power supply systems. It can replace some kinds of rheostats in some areas.Different from the usual rheostats,this E-LOAD equipment can simulate most kinds of the load.
This article introduces a method to measure the voltage and currtnt of power system with a microprocessor.The equipment,using software, processes the data in real-time and all along the line.
It can also calculate and compensate the error of every algorithm,
And increase the precision in measurement.
In our test,if this E-LOAD can be effectively extended,
It can measure the current level highly at ±75A. It also can measure the power level highly at 500 Watts.
Key Words: E-LOAD, SingleChip(MCU), Analog to Digital Convertor,
Digital to Analog Convertor.