Blog | ElectronicsDIY – Tested Electronics Projects and Tutorials

ESP32 DevKit V1 Pinout – Complete GPIO Guide

Admin
October 5, 2026

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 […]

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Online Serial Monitor

Admin
October 3, 2026

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.

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Online Gerber Viewer and PDF Converter

Admin
October 2, 2026

View and inspect PCB Gerber files online with our free Gerber Viewer. Upload Gerber files or a ZIP package to visualize PCB layers, inspect board artwork, and generate a PDF for documentation and review.

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TL431 Voltage Reference / Feedback Calculator

Admin
October 2, 2026

Calculate TL431 output voltage, resistor values, divider current, and resistor power for voltage reference and feedback circuits. Quickly select suitable standard resistor values for your desired output voltage.

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Voltage Divider Calculator

Admin
October 2, 2026

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.

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Ohm’s Law Calculator

Admin
October 2, 2026

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

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LED Resistor Calculator

Admin
October 2, 2026

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.