Measure an electrocardiogram (ECG) with an Arduino Uno and an Olimex-EKG-EMG-Shield and calculate the heart rate variability afterward.

A curated and opinionated list of resources for Chief Technology Officers, with the emphasis on startups

💰 Billing & Payments knowledge for cloud platforms

The Startup CTO's Handbook, a book covering leadership, management and technical topics for leaders of software engineering teams