Abstract.This dissertation presents the design and construction of pressure circuit switching 0 - 400 volt, adjust, which is a parallel circuit pressure suitable for high voltage and low current by using a transistor IGBT in current control output. The circuit can adjust the output voltage with multiple levels are suitable for application to treat with different kinds of electronic devicesPressure circuit switching 0 - 400 volt, adjustable, built include control level can be controlled by microcontroller output voltage The board microcontroller. Dewey Sano. Will generate pulse signals to stimulate the work of IGBT. The current and stop the publicity by optical grown copper as a medium to link electrical signal between the control part with the sector is used to stimulate their IGBT circuit.Test result of working ability of the จรรัก maintain the pressure can be adjusted. The controlled by microcontroller By using a microcontroller Arduino board by the working principle. The DC voltage automatic treatment system. Set the input voltage from the keyboard to the pressure value can be set much by ได้ตั้งแต่ 0 - 400 V. The information to be sent to the microcontroller processing from the board Arduino enters to do the selection can relay when relay work will contribute to a global magnetic contactor work voltage from the source of supply transformer will pass to the alternating current voltage converter circuit as a voltage curve Leading to high voltage direct current to the load.
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