From Voltage to Volume — Calibrating Analog Sensors
Learn how to calibrate an analog pressure sensor to measure volume using numerical integration.
Beginner
8 minutes
Jul 6, 2025
Arduino
Isolating the Corneo-Retinal Dipole: Building a Robust EOG Analog Front-End
The human eye is a natural dipole. The cornea carries a positive charge while the retina is negatively charged, creating a resting potential of roughly 10 to 30 millivolts. The raw voltage potential reaching the skin is attenuated to the microvolt range and completely drowned out by surrounding electromagnetic interference (EMI) and electromyographic (EMG) muscle noise.
Intermediate
29 minutes
May 30, 2025
Digital Spirometer: State Machines & FVC Algorithms
Learn how to implement a state machine and FVC algorithm for a digital spirometer.
Intermediate
28 minutes
Jul 16, 2025
Building a Low-Cost Digital Spirometer with Arduino & MPX2010
Learn to design a high-precision digital spirometer using an Arduino Nano and MPX2010 pressure sensor. This engineering guide covers analog signal processing, circuit integration, and algorithms for calculating Forced Vital Capacity (FVC).
EOG Sleep Mask: Detecting Secondary Sleep Strokes in Real-Time
A wearable, real-time stroke detection system disguised as a comfortable sleep eye mask. By utilizing electrooculography (EOG) to track eye movement and an onboard microcontroller to perform real-time signal processing, the device acts as an automated sentinel.