We have implemented a near-ultrasonic communication protocol in the 18.5-20 kHz band, which is inaudible to most humans, using commodity smartphone speakers and microphones to transmit and receive ...

Sampling oscilloscope with 4 channels (voltages from 0 to 5V), with frequencies up to 3kHz. It has a PWM signal generator and a square wave output. It can also automatically identify the resistor or ...

In this paper, we present a single-chip 65 × 42 element ultrasonic pulse-echo fingerprint sensor with transmit (TX) beamforming based on piezoelectric micromachined ultrasonic transducers directly ...

Environmental and health monitoring requires low-cost, high-performance diethylamine (DEA) sensors. Materials based on metal–organic frameworks (MOFs) can detect hazardous gases due to their large ...

While the Find X9, X9+, and X9 Pro are likely to be powered by the Dimensity 9500 chipset built on TSMC’s 3nm N3P process, the Ultra model is tipped to use the upcoming Snapdragon 8 Elite 2 ...

PID-based one-axis ball balancing robot using Arduino. Uses an ultrasonic sensor and servo motor to stabilize a ball at a target distance. Real-time tuning of Kp, Ki, Kd via Serial. Includes stability ...