Electronics & Robotics
Calculators for circuits, motors, and robot builds.
- 2-Link Robot Arm Kinematics CalculatorPlanar 2R forward and inverse kinematics with elbow-up/down solutions.
- Battery C-Rating CalculatorCapacity and C-rating ↔ max continuous discharge current.
- Battery Runtime CalculatorEstimate runtime from battery capacity and load current.
- Capacitor Charge Time CalculatorRC time constant and times to 63%, 95%, and 99% charge.
- Decibel ConverterConvert between dB, power/voltage ratios, and dBm.
- Differential Drive Kinematics CalculatorConvert body twist ↔ left/right wheel speeds for a diff-drive robot.
- Electrical Power CalculatorSolve electrical power with mW/W/kW unit support.
- Encoder Distance CalculatorConvert encoder counts ↔ distance from CPR and wheel/pitch.
- Gear Ratio CalculatorCompute gear ratio, output RPM, and ideal torque multiplication.
- LED Array CalculatorSeries/parallel LED counts → resistor values and feasibility check.
- LED Series Resistor CalculatorFind the series resistor for an LED from supply, Vf, and current.
- Ohm's Law CalculatorSolve for voltage, current, resistance, or power from any two values.
- PID Tuning Reference (Ziegler–Nichols)Ziegler–Nichols P/PI/PID starting gains from Ku and Tu.
- RC Time Constant CalculatorCompute τ = RC and common charge/discharge multiples for RC circuits.
- Resistor Color Code CalculatorDecode 4-band and 5-band resistor colors, or encode a resistance value.
- Servo PWM CalculatorMap servo angle to pulse width and duty cycle (and reverse).
- Stepper Motor CalculatorSteps per revolution and linear travel from microstepping.
- Thevenin Equivalent CalculatorFind Vth and Rth for a few common simple resistor networks.
- Voltage Divider CalculatorCompute Vout from R1/R2, or solve for a resistor given a target Vout.
- Wire Gauge & Ampacity CalculatorAWG size, reference chassis ampacity, and DC voltage drop.