Open-loop control of stepper motors reduces system cost and complexity for positioning systems. To produce a precise current waveform, novel open-loop implementation hysteresis controller is presented compared to the existing pulse-width modulation method. The new method extends resolution available given sampling rate, allowing finer motor current. Applications precision minimize external dist...

This paper shows the potential system benefits of simple tracking solar system using a stepper motor and light sensor. This method is increasing power collection efficiency by developing a device that tracks the sun to keep the panel at a right angle to its rays. A solar tracking system is designed, implemented and experimentally tested. The design details and the experimental results are shown...

In this paper we present the development and implementation of an intravenous inf~ision controller system based on fpga’s. The system receives irEformation of an infision drop sensor and controls the drop flow by giving the direction and number of steps of a stepper motor, which compress the drip-feed hose. The system consists of a mixed implementation of sofnvare and hardware. The software was...

Numerical control is a useful technology to machine that utilize numeric values and codes. The comes with various sizes built-in its own controller. However, most of the commercial CNCs controllers are expensive work only on dedicated machine. With recent advancement automation, custom conrtoller for CN operation possibly be build. In this project, three axis motion controlled by Arduino Uno bo...

A microprocessor based solar tracking controller is designed and fabricated . In addition to tracking , the controller is capable acquiring photovoltaic and metereological data from a photovoltaic system and controlling battery / load . These features are extremely useful in autonomous PV system installed in remote areas for system control and monitoring. Solar tracking can be achieved in close...

Elastography is an emerging imaging modality that allows noninvasive imaging of tissue stiffness changes and stiffness values associated with pathology or as a result of therapy. However, many currently-used systems for elastography rely on a fixed geometry transducer and compressor system for imaging. This configuration is disadvantageous for imaging difficult-to-reach regions that are current...