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This paper presents the design of electric wheelchair. We build machine that is capable to attach with any traditional wheelchair, and to control its movement semi-automatically. This helps handicapped person who has difficult body-movement to be able to travel simply. The machine comprises of power-driven system including a metal tube frame, wheels, motor, brake and accelerator, and electronic control department based H-bridge circuit and programmable microcontroller with the ATmega168. Software was developed in C++ language for programming microcontroller. Technical test was done on H-bridge circuit to confirm an accurate functioning in controlling direct current motor. Running test was on flat straight and slope courses. Result showed that it achieved a maximum load is 100 kilograms with a top speed of 8.42 kilometres per hour, and the average of battery lifetime is up to 1 hour and 30 minutes. Thus, we build a cost effective machine to provide an opportunity to translate conventional wheelchair to be an electric wheelchair. 

We describe the design and development of wireless electrocardiogram monitoring system to meet the biomedical needs. Our system is able to acquire, display and record the patient's real time electrocardiogram (ECG) data. Patient data received from this system can be further used for analysis of abnormal heart rate and new clinical applications. System hardware comprises of an electrode as part of signal input, signal conditioning components for manipulating signal, the 8051 microcontroller unit to perform signal processing and wireless communication module. Software was developed in Visual Basic 6 to record and visualise ECG signal in real time. Therefore, we implemented ECG monitor system, and this can be used to advanced ECG study. 