sy's notebook https://syblog.example.com Hardware, software, math, and reverse engineering. en Thu, 28 May 2026 19:05:09 GMT An introduction to Analog Computing: Approximating π https://syblog.example.com/electronics/opamp/index.html https://syblog.example.com/electronics/opamp/index.html Wed, 27 May 2026 00:00:00 GMT Understanding Analog Computing from first principles, with a complete build guide.