Online Serial Monitor
Use our free online serial monitor to connect to USB serial devices, send and receive data in text or HEX...
Tools
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...
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...
Tools
Voltage Divider Calculator
Calculate the output voltage of a resistor voltage divider using the input voltage and resistor values. Quickly determine the voltage...
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...
Tools
LED Resistor Calculator
Calculate the correct series resistor for an LED using the supply voltage, LED forward voltage, and desired LED current. Includes...
Tools
555 Timer Calculator
Calculate 555 timer frequency, period, ON time, OFF time, duty cycle, and pulse width in astable and monostable modes.
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.