working_on_EMG
New Member
Hello there. Im a newbie in this forum. Early this year I constructed a circuit to measure EMG from the biceps brachii muscle for a class project. Now im interested in constructing another EMG circuit with better signal to noise ratio and a clearer EMG signal output with no (or very small) delay. I have attached the schematic of the EMG circuit i had constructed (forum_schematic.jpg) together with the oscilloscope outputs for the band pass filter stage (forum_schematic1.jpg), precision rectifier stage (forum_schematic2.jpg) and finally smoothing low pass filter stage (forum_schematic3).. Could you guys please give me some advice on how I can construct a better EMG circuit than this one? My purpose of constructing this circuit is to measure EMG from forearm muscles (brachioradialis, flexor digitorum superficialis, Extensor Carpi radialis longus) and relate it to hand grip force measured using a hand dynamometer.. Thanks! Would really appreciate feedback,comments or questions =)