project11 min read
Smart Door Lock
An IoT door lock system that uses an ESP8266, a solenoid lock, and a biometric sensor for secure, keyless entry.
Dec 13, 2021286 views
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Electronics
Arduino projects, circuit design, PCB development, and electronic prototyping tutorials
41 articles•Updated regularly•Curated by Manish
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project
Heart Rate & SpO2 Monitor
A personal health device that measures heart rate and blood oxygen saturation (SpO2) using a pulse oximeter sensor and displays the data on an OLED screen.
December 20, 2021
11 min read
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project14 min read
Smart Mirror
A DIY smart mirror that displays information like time, weather, and news. It uses a Raspberry Pi, a monitor, and a two-way mirror.
Dec 6, 2021252 views
project11 min read
Smartphone Controlled IoT Car
An IoT car that can be remotely controlled at high speed via a smartphone, using a NodeMCU for Wi-Fi connectivity.
Nov 29, 2021106 views
project11 min read
Walking Spider Robot
A 3D-printed crawling spider robot that uses an Arduino Nano and 12 servo motors to achieve life-like walking movements.
Nov 22, 2021410 views
project11 min read
Sketch Drawing Toy
An Etch A Sketch-style drawing toy using a Feather M4 Express, a 2.4" TFT FeatherWing, and potentiometers for control.
Nov 15, 2021492 views
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, 202168 views
article3 min read
SystemVerilog Testbench Basics for Firmware Engineers Who Need to Verify HDL
Firmware engineers who write glue HDL need testbenches. SystemVerilog's interface construct and initial block simulation are enough to verify most glue logic without UVM.
Nov 1, 20210 views
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, 2021281 views
article4 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, 20210 views
article4 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, 20210 views
article4 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, 20210 views