When electric devices are close or interconnected to each other, electromagnetic interference interacts among all these devices. As for our project, the primary source of interference is caused by the secondary ignition cables. When current stops and starts it creates a strong electromagnetic signal wave which interferes with other electronic systems such as crankshaft position sensor, camshaft position sensor and ignitor. The undesirable side-effect of the phenomenon of interference we encounter is that the louder electronic device operating noise and sometimes malfunctions of the electronic devices. and when we perform scope test, the interference is especially appeared on the waveforms
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