Overview:
Constant current sources are used in many industrial and scientific experimental fields such as test metrology and semiconductor performance testing. The research and design of an intelligent high-precision constant current source has a wide range of applications. However, in the process of developing an electronic product, it is necessary to repeatedly design, trial and debug, and physical trial production and debugging is a time-consuming and laborious task, which is often half the effort, resulting in long system development cycle and high cost. With the rapid development of large-scale integrated circuits and computers, computer simulation technology has completely changed the traditional design method of relying on manual parameter calculation, circuit experiment, physical trial production and system debugging in the design of electronic systems. Using EDA simulation software, The existing system or the different design schemes envisaged are simulated on the computer, and combined with the physical trial production and debugging, thereby optimizing the component parameters, improving the system performance, minimizing the design cost, and shortening the system development cycle. Proteus is a powerful system design auxiliary EDA simulation software. It can be used to design, analyze, research and experiment with digital constant current source, which can achieve the purpose of developing and developing actual electronic products.
This paper introduces the digital constant current source simulation system developed by EDA simulation software Proteus, and analyzes the hardware circuit design scheme and main program code of the system.
The system mainly includes a matrix keyboard input module, a numerical control module, a constant current circuit module, a current sampling module, a serial communication module, and a PC monitoring interface. The constant current source is based on a single-chip microcomputer, and the high-power FET IRF530 is used as a constant current device. The 10-bit resolution A/D and D/A chips have an output current of 20~2 000 mA and a minimum resolution of 2 mA. Local button control and PC remote control can be implemented at the same time. The simulation results show that the design scheme is feasible and can achieve better stability and higher precision.
More about IRF530: Integrated Circuit Query Network http://
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