Pinouts

ESP32 DevKit V1 Pinout – Complete GPIO Guide

  • October 5, 2026
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The ESP32 DevKit V1 is a popular development board based on the ESP32-WROOM-32 module. It provides access to the ESP32’s GPIO pins along with ADC, DAC, PWM, UART, SPI, I²C, touch-sensing, and other peripheral functions. This ESP32 DevKit V1 pinout guide explains the function of each pin and highlights important pins that require special attention […]

Tools

Online Serial Monitor

  • October 3, 2026
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Use our free online serial monitor to connect to USB serial devices, send and receive data in text or HEX mode, select baud rate and serial settings, and monitor embedded devices directly from your browser.

Tools

Voltage Divider Calculator

  • October 2, 2026
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Calculate the output voltage of a resistor voltage divider using the input voltage and resistor values. Quickly determine the voltage across the lower resistor for circuit design and analysis.

Tools

Ohm’s Law Calculator

  • October 2, 2026
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Calculate voltage, current, resistance, and power using Ohm’s Law. Enter any two known values to determine the remaining electrical parameters quickly and accurately.

Tools

LED Resistor Calculator

  • October 2, 2026
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Calculate the correct series resistor for an LED using the supply voltage, LED forward voltage, and desired LED current. Includes resistor value and power rating.