https://til.maroukis.net Last 10 notes on Spencer's TIL Blog Quartz -- quartz.jzhao.xyz https://til.maroukis.net/ https://til.maroukis.net/ Collecting short tidbits of things I learn along the way. Subscribe via RSS. My other websites: Projects Blog | Working Notes. Have a specific interest? This site has full-page search, or you can check out the tag index. Wed, 19 Mar 2025 02:56:04 GMT https://til.maroukis.net/README https://til.maroukis.net/README Note if you are viewing this on the https://til.maroukis.net domain this is the README of the source notes at https://github.com/smaroukis/til-source. Wed, 19 Mar 2025 02:56:03 GMT https://til.maroukis.net/Deriving-the-Noise-Gain-vs-Signal-Gain-of-the-Inverting-Op-Amp https://til.maroukis.net/Deriving-the-Noise-Gain-vs-Signal-Gain-of-the-Inverting-Op-Amp A further derivation of the closed loop gain equation found in Walter Jung's seminal book on operational amplifiers. Wed, 19 Mar 2025 00:00:00 GMT https://til.maroukis.net/Programming-STM32-via-SWD-with-Arduino-IDE-on-Ubuntu https://til.maroukis.net/Programming-STM32-via-SWD-with-Arduino-IDE-on-Ubuntu Oh Linux. I just wanted to quickly program an STM32 chip over SWD with the Arduino IDE for a blinky test but . Sun, 16 Feb 2025 00:00:00 GMT https://til.maroukis.net/The-black-magic-of-noise-shaping-in-Sigma-Delta-ADCs https://til.maroukis.net/The-black-magic-of-noise-shaping-in-Sigma-Delta-ADCs Now that I understand it I am even more confused on why it works. Tue, 11 Feb 2025 00:00:00 GMT https://til.maroukis.net/Faradays-Ice-Pail-Experiment-and-the-Effect-of-Shield-Grounding https://til.maroukis.net/Faradays-Ice-Pail-Experiment-and-the-Effect-of-Shield-Grounding An incomplete inquiry into shield grounding from the electrostatics point of view. Thu, 30 Jan 2025 00:00:00 GMT https://til.maroukis.net/Frequency-Compensated-Voltage-Divider-Uses-Pole-Zero-Cancellation https://til.maroukis.net/Frequency-Compensated-Voltage-Divider-Uses-Pole-Zero-Cancellation The frequency compensated divider uses pole zero cancellation to achieve constant gain over all frequencies. Sat, 19 Oct 2024 00:00:00 GMT https://til.maroukis.net/The-same-amount-of-energy-is-lost-in-an-RC-circuit-no-matter-how-small-R-is-made https://til.maroukis.net/The-same-amount-of-energy-is-lost-in-an-RC-circuit-no-matter-how-small-R-is-made There is no free lunch thanks to the 2nd law of thermodynamics. Wed, 14 Aug 2024 00:00:00 GMT https://til.maroukis.net/Everything-is-Analog-1 https://til.maroukis.net/Everything-is-Analog-1 The bit-banged Clock waveform of a found-online TM1637 library for STM32 is ugly and only shows the clock getting up to 1.6V (3.3V supply) for “High”…but bit banging at TM1637_BIT_DELAY = 40 works, and “10” doesn’t (not enough time for the signal to reach the lower threshold of digital 1. Sat, 13 Jul 2024 00:00:00 GMT https://til.maroukis.net/itoa-is-not-included-in-stdlib-in-the-ANSI-gcc-standard-but-is-included-by-the-Arduino-implementation https://til.maroukis.net/itoa-is-not-included-in-stdlib-in-the-ANSI-gcc-standard-but-is-included-by-the-Arduino-implementation Although the Arduino GCC implementation of <stdlib.h> includes itoa(), this is as an extension and not the standard for most compiler implementations following the ANSI / POSIX C standard library implementations. Thu, 09 May 2024 00:00:00 GMT