Thinking Robot Hub

Firmware, IoT, and Electronics Calculator Suite

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Ohm's Law Solver

Enter any two values to calculate the remaining field automatically.

Volts
Amps
Ohms
P = 0.00 W
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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 →
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LED Resistor

Calculate the required series resistor for an LED.

0 ฮฉ
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Resistor Color Lab

Bi-directional 4-band visual color decoder.

Launch Decoder →
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Programmer's Base Converter

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

Launch Bit Flipper →
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555 Timer (Astable)

Calculate Frequency and Duty Cycle for astable oscillators.

R1 kฮฉ
R2 kฮฉ
C1 ยตF
F = 4.81 Hz
Duty: 52.4%
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ADC Step Size

Voltage per bit for microcontrollers.

3.22 mV / step
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IoT Battery Life

Estimator for ESP32/PICO deep-sleep nodes.

Launch →
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RC Filter Calc

Low/High pass cutoff frequency solver.

Launch →
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PCB Trace Width

IPC-2221 current capacity calculator.

Launch →
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Stepper Resol.

Translates microsteps to mm of travel.

Launch →
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Voltage Drop

Wire length/gauge resistance loss calculator.

Launch →
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Decibel (dB)

Power and voltage ratio conversions.

Launch →
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NTC Thermistor

Steinhart-Hart resistance to temp conversion.

Launch →