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Tools

Online 3D Model Viewer – STL, OBJ & 3MF

View STL, OBJ, and 3MF files online for free with our 3D model viewer. Rotate, measure, inspect mesh information, and...

• BY Admin
• October 17, 2026
• 0 Comments

ESP32 Pinouts

ESP32-WROOM-32 Pinout: Complete Module & Development Board Guide

The ESP32-WROOM-32 is a popular Wi-Fi and Bluetooth module used in IoT devices, robotics, automation systems, and embedded electronics projects....

• BY Admin
• October 5, 2026
• 0 Comments

Tools

Online Serial Monitor

Use our free online serial monitor to connect to USB serial devices, send and receive data in text or HEX...

• BY Admin
• October 3, 2026
• 0 Comments

Tools

Online Gerber Viewer and PDF Converter

View and inspect PCB Gerber files online with our free Gerber Viewer. Upload Gerber files or a ZIP package to...

• BY Admin
• October 2, 2026
• 0 Comments

Tools

TL431 Voltage Reference / Feedback Calculator

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

• BY Admin
• October 2, 2026
• 0 Comments

Tools

Voltage Divider Calculator

Calculate the output voltage of a resistor voltage divider using the input voltage and resistor values. Quickly determine the voltage...

• BY Admin
• October 2, 2026
• 0 Comments

Tools

Ohm’s Law Calculator

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

• BY Admin
• October 2, 2026
• 0 Comments

Tools

LED Resistor Calculator

Calculate the correct series resistor for an LED using the supply voltage, LED forward voltage, and desired LED current. Includes...

• BY Admin
• October 2, 2026
• 0 Comments

Tools

555 Timer Calculator

Calculate 555 timer frequency, period, ON time, OFF time, duty cycle, and pulse width in astable and monostable modes.

• BY Admin
• September 25, 2026
• 0 Comments

Tools

Resistor Colour Code Calculator

Calculate resistor values from 4-band and 5-band colour codes, or find the colour bands for a known resistance value.

• BY Admin
• August 29, 2022
• 0 Comments