1×4 Keymatrix Key Matrix Membrane Switch Control Panel Keypad Keyboard in Pakistan

The WTV020SD is a small, simple IC for embedding audio playback into your next project. These devices are commonly used in children’s toys and talking retail displays. This breakout board allows you to access the functionality of the WTV020SD to give a voice to your next project. The breakout board includes a battery connector and a micro-SD card slot. Simply load your audio files onto a micro-SD card and plug it in, power up the module, and trigger the playback. Playback can be triggered in either key or serial mode: The key-mode provides a stand-alone operation where a host micro is not required. With only 3 push buttons, a 3V battery, and a speaker, an extremely compact and low component count MP3-Player-like system can be implemented. The serial mode provides a simple, 2-wire interface to any micro-controller via its DATA and CLK lines. Audio operations such as PLAY, PAUSE, STOP, and VOLUME control functions are all available to the host micro via simple serial commands. The audio compression used in this module is a little strange (4-bit ADPCM @ 6-32kHz) so you’ll need to download the utility in the documents below in order to convert yours. WAV files into the 4-bit ADPCM format required.

The MAX30102 is an integrated pulse oximeter or SO2 sensors, and heart rate monitor biosensor module. MAX30102 SO2 integrates a red LED and an infrared LED, photodetector, optical components, and low-noise electronic circuitry with ambient light suppression.

The heart rate sensor module MAX30100 is an integrated pulse oximetry and heart rate monitor sensor solution. Heartbeat sensor combines two LEDs, the photodetector, optimized optics. This best heart rate module is low-noise analogue signal processing to detect pulse oximetry and heart-rate signals.