LTSPICE ONLINE SIMULATOR DRIVER
LTSPICE ONLINE SIMULATOR SOFTWARE
LTSPICE ONLINE SIMULATOR SERIES
LTSPICE ONLINE SIMULATOR SIMULATOR

The number of models supported for active devices is impressive and includes some very recent MOSFET models, not just the old standard models. Have a look at the brochure and you will see this is a pretty serious piece of software. ThereвЂ™s a built-in designer for active and passive filters.

LTSPICE ONLINE SIMULATOR SIMULATOR

The simulator boasts a multipage schematic editor, native robust digital simulation, Monte Carlo analysis, 33,000 parts in its library, worst-case and smoke analysis, Smith charts, and it can even incorporate spreadsheets. You may be thinking: why use another closed-source simulator? Well, all the simulators have particular strengths, but Micro-Cap does have very nice features and used to retail for about $4,500.

LTSPICE ONLINE SIMULATOR SOFTWARE

However, there is a new free option after the closing of Spectrum Software last year: Micro-Cap 12.

Using Ohm's law 11.3 / 0.005 = 2.2 kiloohms.If you are looking for simulation software, you are probably thinking LTSpice or one of the open-source simulators like Ngspice (which drives Oregano and QUCs-S), or GNUCap. So we will use a resistor that can drop 12 - 0.7 = 11.3 V at 5 mA. The voltage drop across the junction is ~ 0.7 V and our power supply voltage is 12 V. We need to forward bias the BE junction of the transistor with 5 mA. A rule of thumb is to use 10 times greater current than this value, so 5 mA should be enough. This means we can drive it on with at least 50 mA / 100 = 500 uA. Let's add an indicator LED of 15 mA parallel with the relay, so the collector current gets 33В + 15 = ~ 50 mA. When on, the collector current will be 33 mA.

BC547 is very common so we'll find it in the library.Д«efore running the simulation, let's turn on the transistor by biasing it. Those are the simulation models available by default in LTspice. For example, if we right click the transistor symbol we will be prompted with a common transistors list that we can choose from. While you can easily right click most passive components and enter their value, for the semiconductors things are a little different. To protect the transistor we'll use a flyback diode (not really needed in the simulation). We are not interested in the inductive properties of relay's coil so we'll substitute it with a resistor. Let's design this part of circuit and play a little with it. We can use BC547 although its maximum collector current is rather low: 100 mA.

LTSPICE ONLINE SIMULATOR DRIVER

We will place this relay in the collector of the driver transistor.

LTSPICE ONLINE SIMULATOR SERIES

G2RL series is very common and it draws only 33 mA (the general purpose type). We will power it from 12 V so we need to choose a 12 V relay. The entries between '' are folders that contain various components grouped by categories. We will select npn2 for the transistor and voltage for the power supply. When you click the Component icon you will be prompted with a library dialog. We will use the ComponentВ (2) button to add a NPN transistor, a diode, a resistor and a voltage supply. Now you have access to the main toolbar from where you can add basic components and perform various operations (cut, copy, paste, draw wires, move or drag symbols). To do that, open LTspice and click the New SchematicВ (1) toolbar button (or the File menu entry). I will draw it from right to left (from output to input).

DC sweep modifies chosen voltages, currents or other parameters.

AC analysis sweeps an AC source parameters and calculates how the circuit behaves to that.

Transient analysis calculates circuit behavior over a period of time.

DC operating point where all capacitors are treated as open circuit and all inductors as closed circuit in order to calculate quiescent voltage and currents for all parts and circuit nodes.

Then you go to Simulate menu and choose Edit simulation cmd. Don't forget to set values for each part otherwise simulation will not work. It is mandatory to add a ground symbol to every schematic. Just add the parts from the top toolbar can connect them with the wire tool.

Ltspice online simulator