Free Embedded / Electronics
Embedded and electronics tools help hardware engineers and hobbyists decode resistor color bands, calculate Ohm's law, design 555 timer circuits, look up pinouts, convert IEEE 754 floats, and estimate battery life — without installing any software. All calculations run in-browser with reference-quality accuracy.
14 tools available
Most Popular
Decode resistor color bands instantly. Supports 4-band and 5-band resistors with tolerance and visual band display.
Try it free →Ohm's Law CalculatorCalculate voltage, current, resistance, or power using Ohm's Law. Solve for any variable by entering the other two.
Try it free →Voltage Divider CalculatorCalculate output voltage or resistor values for a resistor voltage divider. Includes SVG circuit diagram.
Try it free →All Embedded / Electronics (14)
Decode resistor color bands instantly. Supports 4-band and 5-band resistors with tolerance and visual band display.
Open tool →Ohm's Law CalculatorCalculate voltage, current, resistance, or power using Ohm's Law. Solve for any variable by entering the other two.
Open tool →Voltage Divider CalculatorCalculate output voltage or resistor values for a resistor voltage divider. Includes SVG circuit diagram.
Open tool →555 Timer CalculatorCalculate frequency, duty cycle, and timing for 555 timer circuits. Supports astable and monostable modes.
Open tool →CRC CalculatorCalculate CRC checksums online. Supports CRC-8, CRC-16/CCITT, CRC-16/MODBUS, CRC-32, and custom polynomials.
Open tool →IEEE 754 ConverterConvert decimal numbers to IEEE 754 floating point representation (32-bit float, 64-bit double) with color-coded bit fields.
Open tool →ASCII TableComplete ASCII character table with decimal, hex, octal, and binary values. Filter by printable or control characters.
Open tool →Baud Rate CalculatorCalculate UART bit timing, frame time, baud rate error for any crystal, and STM32 prescaler values.
Open tool →Battery Life CalculatorEstimate battery life for Arduino, ESP32, and IoT devices. Supports 18650, LiPo, AA, and custom batteries.
Open tool →PWM Servo CalculatorCalculate PWM pulse width, duty cycle, and servo angle. Convert angle to duty or pulse to angle with 16-bit timer count.
Open tool →Embedded Number ConverterConvert numbers between hex, decimal, binary, and octal with 8/16/32/64-bit widths. Shows byte breakdown and bit layout.
Open tool →ESP32 Pinout ReferenceComplete ESP32 WROOM-32 pinout with GPIO, ADC, SPI, I2C, UART, and touch pins. Filter and search by function.
Open tool →Arduino Pinout ReferenceComplete Arduino Uno R3 pinout with digital, analog, PWM, SPI, I2C, UART, and interrupt pins. Click for details.
Open tool →Raspberry Pi GPIO PinoutComplete Raspberry Pi 40-pin GPIO reference with BCM/physical numbering, physical header view, and bus quick reference.
Open tool →Frequently Asked Questions
- Are embedded electronics tools free?
- Yes. All embedded and electronics tools are free with no usage limits or sign-up required.
- Are calculations accurate for real hardware?
- Yes. Calculations use standard electronics formulas — Ohm's law, 555 timer equations, UART timing, Terzaghi's bearing capacity. Always verify critical designs with a datasheet or oscilloscope before production.
- Which embedded tools are available?
- Stax includes a resistor color code calculator (4- and 5-band), Ohm's law calculator, voltage divider calculator, 555 timer calculator, CRC calculator, IEEE 754 converter, UART baud rate calculator, battery life estimator, PWM/servo calculator, and pinout references for ESP32, Arduino Uno, and Raspberry Pi.
- Do the pinout tools show alternate functions?
- Yes. The ESP32, Arduino, and Raspberry Pi pinout references show digital, analog, PWM, SPI, I2C, UART, and interrupt assignments — with bus quick-reference tables for I2C and SPI.
- Is my circuit data stored?
- No. All calculations run in your browser and no data is sent to any server.