Programmable Power Supply Hardware Design Based On Single Chip Microcomputer

Power supply complete the product design is the most basic of modern tools.Programmable power supply is in one of these new power supplies. Programmablepower supply with single-chip microprocessor control, advanced technology, allprogrammed, all key operations, small size, light weight, adjustable output parameters,easy to carry, both for the laboratory, you can also use the site.Its design system control module,NC power by driving module,auxiliary powermodule,display module,buttons were five modules adjust module. This design with dcvoltage source as the core,STC12C5410AD microcontroller, mainly through thekeyboard to set the controller dc power output voltage,setting stepping level can amountto0.1V,output voltage range of0-25V,maximum current1A,and by the display on theLCD panel output voltage. The system is composed of single-chip microcomputerprogram-controlled output digital signal， and then after op-amp isolatingamplifier,control the output power tube,as the base of the base power tube voltageoutput different voltage changes,the input voltage， feedback voltage,feedback by LCDdisplay current. These designs ultimately realize functions: The system can use LCDdisplay Settings voltageand the current voltage. Through the addition and subtractionkey bindings output voltage,stepping0.1v.,0-25V adjustable. The current real-timesampling is displayed on LCD and the current value. This paper analyzes in detail theworking process of the programmable power supply, programmable power supply wasthe last of the computer simulation and physical simulation of production machines toverify its feasibility and effectiveness.