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Code/encode resistor color bands

Resistor Color Coder 2


Determine resistor values from color bands or SMD markings. Works for both 4 and 5 band leaded-type resistors, as well as 3 and 4 digit Surface Mount Device codes, EIA-96 1% SMD codes and 2,5,10% SMD codes.

free download (389 Kb)


Active filter circuit design software

Filter Wiz PRO 5.33


Active filter design software for lowpass, highpass, bandpass and bandstop electronic filters using resistors, capacitors and op amps. Provides Butterworth, Chebyshev, Elliptic and Bessel Approximations to order 20, with a variety of circuit choices.

free download trial (5.07 Mb)


Active filter circuit design software

Filter Wiz Lite 1.08


Active filter design software for lowpass, highpass, bandpass and bandstop electronic filters using resistors, capacitors and op amps. Provides Butterworth, Chebyshev, Elliptic and Bessel Approximations to order 10, with a variety of circuit choices.

free download trial (4.67 Mb)



simulator for electronic circuit design

ESketch 2.14


Electronic circuit simulator with rapid schematic capture and many simulation features including Monte Carlo analysis, Parameter Sweep analysis, Pole-Zero calculation, multiple voltage probes, input impedance, real and ideal op amp models.

free download trial (3.56 Mb)


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