Circuit Splash

Professional PCB trace width calculator using IPC-2221 standards. Calculate trace width, resistance, voltage drop, & power loss with flexible units. Free tool for engineers & students.

This Power density calculator allows you to measure the power density from an antenna at a certain distance by providing the output power and gain values.

A potential divider circuit is a very common circuit used in electronics where an input voltage has to be converted to another voltage less than it. This circuit is very useful for all analog circuits where variable voltages are required, hence it is important to understand how this circuit works and how to calculate the values of Resistors.

A resistor is identified by its pattern of color of bands. There are 4, 5 and 6 band resistors. To calculate the resistance of a resistor, you can select the appropriate color bands in the this resistor color code calculator and calculate the resistance value according to the color of bands.

This battery life calculator allows you to estimate the battery runtime. You can calculate how long the battery will last depending on the battery capacity and the amount of current consumed by the circuit.

This voltage drop calculator allows you to calculate the voltage drop across a cable or wire.

It's often necessary to power a low voltage circuit such as a microcontroller with HV AC line current. For example, most fire alarms are powered this way. In these situations, a transformer is both bulky and expensive especially if the device is a consumer product.

This circuit creates a voltage inversely proportional to a variable resistance.

4-level LED lamp display power, not working state intelligent automatic shutdown;
The built-in lithium battery protection IC, over-current, overpressure, under-voltage protection;
Dual USB output ports.