Hari Nair

USB Audio DAC using inexpensive STM32F411 / 401 "Black Pill" and PCM5102A modules

har-in-air

GPS altimeter/variometer with LCD display, routes with waypoints, data/gps track logging, bluetooth NMEA sentence transmission, wifi AP + webpage configuration

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Espressif ESP32 driving a controller-less monochrome lcd with parallel I2S bus

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Breakout board for ESP32 WROOM32 module

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Kalman filter to estimate altitude and climbrate(sinkrate) by fusing altitude and acceleration sensor data

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A bluetooth audio vario with zero-lag climb/sink rate feedback. Configurable and firmware upgradable via WiFi. Uses off-the-shelf modules. Schematic and PCB layout provided.

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ESP32 Multi-meter : Current and voltage meter using an INA226 sensor, frequency counter and generator

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ESP32 high-speed flash data logger for IMU (accelerometer+gyro+magnetometer), GPS, pressure sensor readings.

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ESP32-C3 audio vario using Kalman filter to fuse acceleration and pressure sensor data. Bluetooth transmission of LK8EX1 sentences.

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Code examples demonstrating usage of peripherals and features on STM32 Cortex micro-controllers

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