With loudspeakers, an important parameter is the frequency at which their cones resonate. This clever Arduino-based tester ...

The efficiency of wireless charging systems is limited by power loss occurring due to frequency changes in the resonant circuits that enable power transfer. These necessary modulations reduce ...

In a recent study published in the PNAS Nexus, researchers introduced and validated resonance sonomanometry (RSM) for noninvasive, calibration-free continuous blood pressure (BP) measurement using ...

A scheme of simple band-pass RC- and LR- filters on operational amplifiers containing only one capacitor or inductor and 3 resistors is proposed. A comparison is made of the amplitude-frequency ...