Guides
Four Motors, Two Drivers: The 4WD Arduino Robot...
The 4WD Arduino Robot Kit with Ultrasonic Avoidance (₹1,320) builds a four-wheel-drive robot that handles what makes 2WD builds give up: gravel, sand, dusty workshop floors and uneven ground. Two...
Four Motors, Two Drivers: The 4WD Arduino Robot...
The 4WD Arduino Robot Kit with Ultrasonic Avoidance (₹1,320) builds a four-wheel-drive robot that handles what makes 2WD builds give up: gravel, sand, dusty workshop floors and uneven ground. Two...
The H-Bridge: How a Motor Learns to Reverse
An H-bridge is an arrangement of four electronic switches around a motor that lets you steer current through the motor in either direction, and since a DC motor's rotation follows...
The H-Bridge: How a Motor Learns to Reverse
An H-bridge is an arrangement of four electronic switches around a motor that lets you steer current through the motor in either direction, and since a DC motor's rotation follows...
Common Ground: Why Two Powered Circuits Ignore ...
Two circuits can only understand each other's signals if their grounds are connected, because every voltage is a difference between two points, and without a shared ground the two circuits...
Common Ground: Why Two Powered Circuits Ignore ...
Two circuits can only understand each other's signals if their grounds are connected, because every voltage is a difference between two points, and without a shared ground the two circuits...
LED Current-Limiting Resistors: The 2-Minute Math
The resistor for an LED is calculated in one line: R = (supply voltage − LED forward voltage) ÷ desired current. For a red 5mm LED on a 5V Arduino...
LED Current-Limiting Resistors: The 2-Minute Math
The resistor for an LED is calculated in one line: R = (supply voltage − LED forward voltage) ÷ desired current. For a red 5mm LED on a 5V Arduino...
Series vs Parallel: Batteries, Resistors, and W...
In series, components sit in one line and share the same current, so voltages add up; in parallel, components sit side by side across the same two points and share...
Series vs Parallel: Batteries, Resistors, and W...
In series, components sit in one line and share the same current, so voltages add up; in parallel, components sit side by side across the same two points and share...
Multimeter Basics: Measuring Voltage, Current a...
The three rules that keep a multimeter alive: measure voltage in parallel (probes across the component, circuit running), measure current in series (break the circuit and make the meter part...
Multimeter Basics: Measuring Voltage, Current a...
The three rules that keep a multimeter alive: measure voltage in parallel (probes across the component, circuit running), measure current in series (break the circuit and make the meter part...