Buying guides
Voice Recognition Modules for Robots: Offline or Cloud
Compare offline voice modules and cloud speech services for robots on commands, microphones, latency and language support.
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Author: jaadudigital
Tutorials
Arduino DC motor speed and direction control with L298N
How an H-bridge driver takes direction and PWM signals, how analogWrite sets motor speed on an Uno, and a first forward, backward…
Tutorials
TT motor vs N20 gearmotor for small robots
Compare the yellow TT gear motor and the N20 micro gearmotor on size, stall current, shaft and driver needs, and learn why…
Tutorials
Arduino serial command parsing for robots
Why Bluetooth robots lag, how the Arduino serial timeout works, and a non-blocking command parser with a simple format and a link-loss…
Tutorials
ESP32 deep sleep: wake sources and battery life
How ESP32 deep sleep works: what it turns off, the ways to wake the board, what memory survives, and a worked battery-life…
Tutorials
SSD1306 OLED status display for Arduino robots
Wire an SSD1306 OLED to an Arduino robot: the 0x3C vs 0x3D address, a first sketch, why begin() can lie, and the…
Tutorials
Line follower robot with Arduino: parts and code
How to build a line follower with Arduino: choosing sensors, placing them, a proportional-steering starter sketch and a step-by-step test plan.
Tutorials
VL53L0X vs VL53L1X vs HC-SR04 for robots
Compare the HC-SR04 ultrasonic sensor with the VL53L0X and VL53L1X time-of-flight sensors, and learn how to wire several time-of-flight sensors on one…
Tutorials
Arduino sensor filtering: average vs median
Compare moving average, exponential and median filters on the same readings, with the arithmetic worked by hand, and learn which one suits…
Tutorials
Arduino millis() vs delay(): robot state machine
Stop your Arduino robot freezing: replace delay() with millis() timing, handle rollover correctly, and organise behaviour as a simple state machine.