project13 min read
Adabot Toy Robot Friend
A friendly, 3D-printable toy robot based on the Adafruit RP2040 Prop-Maker Feather, featuring dynamic NeoPixel animations and servo motor movements.
Nov 8, 2021226 views
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Electronics
Arduino projects, circuit design, PCB development, and electronic prototyping tutorials
33 articles•Updated regularly•Curated by Manish
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project
Sketch Drawing Toy
An Etch A Sketch-style drawing toy using a Feather M4 Express, a 2.4" TFT FeatherWing, and potentiometers for control.
November 15, 2021
11 min read
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project15 min read
Obstacle Avoiding Smart Car
A smart car that utilizes an Arduino and ultrasonic sensors to detect and navigate around obstacles. It's a classic robotics project for beginners.
Nov 1, 2021457 views
article33 min read
Bench Power Supply Autobiography, Part 3: Adding Current Limiting Without Oscillation
Current limiting feedback and voltage feedback in the same loop fight each other. Compensation that works for one mode tends to destabilize the other.
Sep 5, 202176 views
article33 min read
Bench Power Supply Autobiography, Part 2: The LT3080 Linear Regulator Design
The LT3080 is an unconventional choice for a bench supply — paralleling multiple regulators for higher current is elegant until the thermal design becomes the problem.
Jun 22, 202142 views
article27 min read
Battery Fuel Gauge Design Notes: MAX17048 vs Software Coulomb Counting
A dedicated fuel gauge IC costs $1.20 and handles SOC estimation better than any coulomb-counting firmware I've written. Why I stopped rolling my own and what I gave up.
May 25, 202142 views
article33 min read
Bench Power Supply Autobiography, Part 1: Why I Stopped Using the Lab Supply
A digital lab supply with a $300 price tag failed to hold a stable rail when the load stepped. The odyssey toward building my own started here.
Apr 8, 202136 views
article32 min read
Home Lab Safety Notes: Mains Isolation, LiPo Charging, and Laser Diodes
Three near-misses over ten years of home lab work. What I changed in my setup and what I wish I had done earlier.
Nov 9, 202038 views
article26 min read
Multimeter False Friends: Readings That Lie and Why
AC-coupled voltage on a DC rail, resistance of a live node, diode test on a FET — a collection of multimeter readings that actively mislead.
Aug 22, 202042 views