Droid Tesla Pro is a simple and powerful circuit simulator. Perfect for students new to electronics circuit design and construction, hobbyists and tinkerers, and even seasoned professionals who want a quick, handy tool to perform electronics circuit design calculations. That’s interactivity and innovation you can’t find in the best SPICE tools for PC like Multisim, LTspice, OrCad, or PSpice (trademarks belong to their respective owners).
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DroidTesla simulator solves basic resistive circuits using Kirchoff’s Current Law (KCL) in much the same way a student in a circuits class would, the simulator systematically forms a matrix by KCL and then proceeds to solve for the unknown quantities using various algebraic techniques such as Gaussian elimination and sparse matrix techniques.
For non-linear components, such as the diode and BJT, the Droid Tesla engine searches for the approximate solution by making an initial guess at an answer and then improving the solution with successive calculations built upon this guess. This is called an iterative process.DroidTesla simulation uses the Newton-Raphson iterative algorithm to solve circuits with non-linear I/V relationships.
For reactive elements(capacitors and inductors), the DroidTesla uses numeric integration methods to approximate the state of the reactive elements as a function of time. DroidTesla offers the Trapezoidal(I’ll add a GEAR method later) integration methods to approximate the state of the reactive elements. Although for most circuits, both methods will provide almost identical results, it is generally regarded that the Gear method is more stable, but the trapezoidal method is faster and more accurate.
DroidTesla for now can simulate:
-Ideal operational amplifier
-Bipolar junction transistor (NPN PNP)
-MOSFET N-channel depletion
-MOSFET N-channel enhancement
-MOSFET P-channel depletion
-MOSFET P-channel enhancement
-JFET N and P
-PN Zener diode
-AC’s current source
-DC’s current source
-AC voltage source
-DC voltage(battery) source
-CCVS – current controlled voltage source
-CCCS – current controlled current source
-VCVS – voltage-controlled voltage source
-VCCS – voltage-controlled current source
-Square wave voltage source
-Triangle wave voltage source
-Two channel oscilloscope
-Current controlled switch
-7 Segment Display
If you are making oscillators you have to put a small initial value on some of the reactive elements. (see the examples)