Journal: Scientific Reports

Article Title: A compact acoustic spanner to rotate macroscopic objects

doi: 10.1038/s41598-019-43046-4

Figure Lengend Snippet: 3D printed acoustic spanner. An exploded view of the main components of the acoustic spanner is shown in ( a ). These are: a custom built amplifiers and filters electronic board (1); an Arduino Due microcontroller (2); 3D-printed connecting structures (3) and (6); the 3D-printed ‘funnel’ acoustic-guide (4); eight mini-speakers (5); and a sample holder (8). The generated OAM acoustic field is artistically represented in (7). Photographs of the assembled acoustic spanner are shown from the bottom ( b ) and from the side ( c ).

Article Snippet: We chose to use an Arduino Due microcontroller board, taking advantage of the ample processing power of its Atmel SAM3X8E ARM Cortex-M3 microcontroller and more importantly, its numerous PWM-output channels, allowing us to generate the desired number of phased sinusoidal-signals.

Techniques: Generated

Journal: Scientific Reports

Article Title: A compact acoustic spanner to rotate macroscopic objects

doi: 10.1038/s41598-019-43046-4

Figure Lengend Snippet: Block diagram of the Acoustic Spanner electronics. The DDS algorithms and PWM signals are implemented on an Arduino Due microcontroller platform. A custom PCB contains the individual low-pass filters and power amplifiers for generating the audio signals. The amplified audio signals are fed to their corresponding loudspeakers, which are housed in a 3D printed funnel-shaped acoustic-guide structure. Some connections to the loudspeakers have been omitted for clarity.

Article Snippet: We chose to use an Arduino Due microcontroller board, taking advantage of the ample processing power of its Atmel SAM3X8E ARM Cortex-M3 microcontroller and more importantly, its numerous PWM-output channels, allowing us to generate the desired number of phased sinusoidal-signals.

Techniques: Blocking Assay, Amplification

Journal: Scientific Reports

Article Title: A Novel Point-of-Care Smartphone Based System for Monitoring the Cardiac and Respiratory Systems

doi: 10.1038/srep44946

Figure Lengend Snippet: The Bluetooth-enabled ECG acquisition system is composed of three commercially available parts: An analog-to-digital (AD) converter, a microcontroller board and, and a Bluetooth module. ( A ) Flow-diagram of the 12-lead ECG signals from the torso to smartphone. Ten electrodes are placed on the torso for the recording of 8 ECG leads (Leads I and II and six precordial leads). The AD converter amplifies and digitizes the 8 ECG leads. Then the signals are transmitted to the smartphone through the HC-05 Bluetooth module, and the remaining leads (Leads III, aVR, aVL and aVF) are calculated. ( B ) Real-time display of selected three ECG signals on the smartphone screen.

Article Snippet: The ECG device is composed of an analog-to-digital (A/D) converter (ADS1298, Texas Instruments, Dallas, TX), a microcontroller board (Arduino Due AT91SAM3 × 8E, Atmel, San Jose, CA), and a Bluetooth module (HC-05, Guangzhou HC Information Technology Co., Ltd., Guangzhou, China).

Techniques: