A pulse width modulated weighing platform

Details A pulse width modulated weighing platform A pulse width modulated weighing platform

G - Physics

08

C

G08C 19/16 (2006.01) G01G 23/00 (2006.01) G01G 23/37 (2006.01)

Patent

CA 2329374

An electronic scale uses an analog signal from a load cell which is converted directly to a pulse width modulated output signal. This pulse width modulated output signal represents the weight of an object on the scale and is sufficient to be directly read by a typical microcontroller. Therefore, no amplifier or analog to digital converter is required. The microcontroller then converts a signal representing the weight of the object on the scale to a weight value. A method of using the counter/timers on the microcontroller with synchronized overflow, is disclosed to enable a high resolution value of the pulse width modulated signal, which is then converted into a weight value for object's weight given that the pulse width modulated output signal is proportional to the weight of an object placed on the load cell.

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