  Dr. Calculus technical calculators

Welcome to the Dr. Calculus pages.

What you are about to find here are sophisticated, on-line, real time calculators for specific jobs. They are designed in order to save you from the time consuming common calculations. Those calculators are not to solve "riddles" and impossible mathematic equations. They are simple in operation (as simple as can be) and each one does one specific task. These tasks are some calculations that an amateur (and not only) project designer will need to do as for example, you may need to solve several times the equation for the calculation of oscillation of a 555. Dr. calculus will do those calculations for you saving you precious time and keeping your results error free.

As you understand, those calculators are far from complete. I would need more than my life to script a complete list of calculators. The list is from time to time enriched with new scripts. In case you badly need a calculator, you may ask from us (with email of course) and you will have it the soonest possible.

All calculators are copyrighted. You may NOT copy the scripts without our permission. This would be against the international law for copyrights.

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Measure with an ohmmeter the pins of the transistor according to the following
series, and place the results. We suppose that RED is the positive (+) wire of
the ohmmeter and BLACK is the negative (-).
The numbers 1,2 and 3 for the pins are the 3 pins of the the transistor in any arrangement
that you like. It is important to maintain this arrangement while measuring

 RED to 1, BLACK to 2 Infinate resistance Some resistance RED to 2, BLACK to 1 Infinate resistance Some resistance RED to 2, BLACK to 3 Infinate resistance Some resistance RED to 3, BLACK to 2 Infinate resistance Some resistance RED to 1, BLACK to 3 Infinate resistance Some resistance RED to 3, BLACK to 1 Infinate resistance Some resistance HOT in heaven! 