Thinking Robot Hub

Firmware, IoT, and Electronics Calculator Suite

⚡

Ohm's Law Solver

Enter any two values to calculate the remaining field automatically.

Volts
Amps
Ohms
P = 0.00 W
🎛️

Precision Voltage Divider Lab

Dynamic 4-way solver for stepping down sensor signals and logic levels. Complete with visual diagrams and dynamic value swapping.

Launch Full Calculator →
💡

LED Resistor

Calculate the required series resistor for an LED.

0 Ω
🎨

Resistor Color Lab

Bi-directional 4-band visual color decoder.

Launch Decoder →
💻

Programmer's Base Converter

Interactive 32-bit visual flipper. Convert Hex, Decimal, and Binary instantly for firmware register masks.

Launch Bit Flipper →
⏱️

555 Timer (Astable)

Calculate Frequency and Duty Cycle for astable oscillators.

R1 kΩ
R2 kΩ
C1 µF
F = 4.81 Hz
Duty: 52.4%
📉

ADC Step Size

Voltage per bit for microcontrollers.

3.22 mV / step
🔋

IoT Battery Life

Estimator for ESP32/PICO deep-sleep nodes.

Launch →
〰️

RC Filter Calc

Low/High pass cutoff frequency solver.

Launch →
🔥

PCB Trace Width

IPC-2221 current capacity calculator.

Launch →
⚙️

Stepper Resol.

Translates microsteps to mm of travel.

Launch →
📉

Voltage Drop

Wire length/gauge resistance loss calculator.

Launch →
🔊

Decibel (dB)

Power and voltage ratio conversions.

Launch →
🌡️

NTC Thermistor

Steinhart-Hart resistance to temp conversion.

Launch →
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