Calculators / Info

Battery Life Estimator

The Battery Life Estimator is an easy-to-use web-based calculator that gives designers a quick and easy way to understand the discharge characteristics of different system configurations to help optimize low-power applications. Online version:

Filter Wiz PRO

Whether new to active filters, or experienced in their design, Filter wiz PRO is the right application for you. Unlike cookbooks, textbooks and simple freeware calculators, Filter Wiz PRO offers in-depth design and highly customizable solutions.

PSU Designer II

PSU Designer II is designed to help you with the design of simple linear (unregulated) mains power supplies, as often found in tube amplifiers.

EqResistors 2.0

Using this tool you can find closest simple resistors net of standard resistors values. Select net, select required resistance and you will got pair (or triplet) of resistors with combined value closest to your needs.

Filter Free 2014

Design Gaussian, Bessel, Butterworth, Chebyshev Type I, Chebyshev Type II, Hourglass, Elliptic, Raised Cosine, Matched and Delay filters for Low Pass, High Pass, Band Pass, and Band Stop Filter Classes.