This application note demonstrates fundamental implementations of the cost effective heart hate monitor (HRM) and electrocardiograph (ECG or EKG) devices using Freescale products. The heart rate monitor is implemented on a low cost MC9RS08KA2 ultra low-end 8-bit microcontroller using an analog comparator module (ACMP) and standard IO pins. The electrocardiograph is implemented on the MC9S08JM60...

This paper presents the design and implementation of an AAC-class digital audio decoder and associated playback system on Microchip’s 16-bit, fixed-point dsPIC microcontroller. Unlike common student “MP3-player” projects that use dedicated decoder chips, one microcontroller handles everything here including I/O, decoding and the user interface. Data read from a flash card is decoded: Huffman co...

The stop watch is used to measure the time required for a certain event. This is different from normal clocks in many ways, one of which is the accuracy of time. The stop watch requires much more accuracy than the normal clocks. In this paper, an ATmega8535 microcontroller was used to control the stop watch, by which perfect accuracy can be ensured. For compiling the C code and for loading the ...

The Asporto Heart Preservation Device is a system providing perfusion of cardioplegia to the donor heart using a computer-controlled peristaltic pump in a thermoelectrically cooled and insulated container. In 1998, a user interface was developed at the University of Minnesota consisting of a touch screen and battery-backed microcontroller. Power was supplied by a 120 VAC to 12 VDC converter. An...

The ideal mathematical modle and error model of a 6-DOF portable flexible coordinate measuring machine (CMM) was established. A parameter data acquisition system for the portable flexible CMM was designed in this paper, which consisted angle sensors, temperature sensors, strain transducers and microcontroller, they were set in each joint and arm. The microcontroller was used to deal with the se...

In this paper we have proposed the design of a DSP microcontroller where the processor load is significantly reduced by relegating the math-intensive DSP algorithm to dedicated transform computing modules. It is shown that the use of such transform modules will facilitate scalability, reusability and flexibility for implementation of wide varieties of DSP functionalities. Moreover, it would be ...

− A new simple method of single soft fault detection and localization of analog parts in embedded electronic systems controlled by microcontrollers is presented. In the pre-testing stage of the method a fault dictionary is created based on the map of localization curves. In the measurement stage the time response to a stimulating square impulse of the analog part is applied to the input of the ...

We propose an architecture for implementing discrete-time control algorithms on a non-real-time operating system so that sensing and actuation occur at precise times, even if the OS preempts the control task. The architecture has the controller perform its computation on one processor and its sensing/actuation on a separate microcontroller. The controller sends arrays of future time-stamped act...

Embedded microcontrollers are highly constrained in cost, power and area. Therefore it is important to reduce the microcontroller die area. This will increase the amount of die per wafer and eventually increases the die yield in the microcontroller production. In addition, decreasing the size of program memory, a major part of the embedded microcontroller, will also reduce the die area for on-c...

Electromagnetic flow meters based on the principles of Faraday’s laws of induction have been used successfully in many industries. The conventional electromagnetic flow meter can measure the mean liquid velocity in axisymmetric single phase flows. However, in order to achieve velocity profile measurements in single phase flows with non-uniform velocity profiles, a novel Imaging Electromagnetic ...