Tag: #circuit
Writing on GPUs, LLMs, MLOps, Kubernetes — and mindset · 4 posts
Ohm's Law for Programmers: Understanding Voltage, Current, and Resistance in Numbers
An Ohm's law guide for software engineers picking up an Arduino or Raspberry Pi for the first time. It redefines voltage not as a "quantity" but as a difference between two points, and pins down exactly where the water a
2026-07-31 · 19 min read #electronics#arduino#circuit#hardware#makerPull-Up, Pull-Down, and Floating Pins: Why a Single Button Is So Hard to Get Right
Starts from why an input pin with nothing connected to it randomly flips between 0 and 1. Explains why a floating input behaves like an antenna, how pull-up and pull-down resistors solve that problem, and what the intern
2026-07-31 · 20 min read #electronics#arduino#raspberry-pi#circuit#hardwareLED Resistor Calculations Done Right: Why Every Color Needs a Different Value, and the E24 Series
Starting from a diode's exponential current curve, this explains why an LED must always have a series resistor. It tables forward voltage by color, then works out real resistor values for both 5V and 3.3V supplies. It co
2026-07-31 · 21 min read #electronics#arduino#circuit#hardware#raspberry-piFingerScore Hardware 5 — Power, Battery, and Circuit Design
We cover, from scratch, the power design that actually keeps the FingerScore ring on. A power budget calculation, coin cell vs. LiPo, charging ICs and protection circuits, LDOs and buck converters, decoupling, low-power
2026-06-17 · 16 min read #fingerscore#power#battery#lipo#circuit