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1. #Spice circuit program for mac how to
2. #Spice circuit program for mac simulator
3. #Spice circuit program for mac windows

If you click the Custom tab, you will see the exact control statement retrieved from the schematic. The other tabs provide for different simulation control statements. This is the place I mentioned earlier where you can enter your SPICE control statements in a more user friendly way, but your entries will not be saved between simulations. Here you can see the correlation of 1u to Time step and 1m to Final time.

The Transient tab should already be selected and populated with the control statement data it obtained from the text within the schematic. Click the Settings icon (gear) within the toolbar to see the Simulation Settings window. Let’s take a look at the simulation settings.

#Spice circuit program for mac simulator

Select Tools > Simulator from main menu and you will see the Spice Simulator window appear. Schematic Diagram Of Transistor Switch Circuit With SPICE Elements Your completed schematic should now look like that shown below. If you are not familiar with placing text in a schematic, this can be accomplished by selecting Place > Graphic Text from the main menu, clicking where you want the text to be placed, adding the text in the popup window, and then clicking OK when done. This corresponds to the SPICE control statement shown an 1u 1mĪdd the above text somewhere in your schematic. Let’s run a transient analysis simulating the circuit from 0 to 1 ms using 1 us for each step. Placing them directly in the schematic not only allows you to retain the SPICE statements, but also gives you the benefit of seeing your statements up front when you load the schematic in the future. There is another way we can do this that is much more user friendly, as I will show you later, but those statements are not retained between separate simulations and will need to be reentered each time. The best way to provide SPICE control statements is simply to add them via placing text directly in the schematic itself. Now we need to tell SPICE (ngspice) what we want to simulate. Click OK when you’re done and also close the Symbol Properties window as well by clicking OK again.

The entries within the Spice Model Editor window should look like those shown below. To fix this issue, enable the Alternate node sequence option with a value of “ 3 2 1“, effectively swapping the collector and emitter pin assignments. This can cause great confusion for users wondering what the heck is going on. For example, the standard SPICE pin assignments for a BJT transistor are pin 1 = collector, pin 2 = base, and pin 3 = emitter, whereas KiCad uses 1 = E, 2 = B, and 3 = C. KiCad uses different pin assignments for semiconductor components than is expected by the ngspice engine. Select 2N2222 for the Model field and BJT for the Type field. The Library field will be populated with the library file name. Load the model file we created by clicking the Select file… button and then choosing the 2N2222.LIB file. Click the Edit Spice Model… button to open the Spice Model Editor and then open the Model tab. This involves operating the transistor in saturation mode, i.e., V E V C for NPN and V E > V B Edit Properties… from the contextual menu. Schematic Diagram Of Transistor Switch Circuit For instance, the maximum current ratings of the GPIO pins for the Arduino Uno is 20 mA and the Raspberry Pi is 16 mA. Sometimes a BJT transistor is used as a switch to drive higher loads (current) than is typically capable from a microcontroller’s GPIO output pins.

#Spice circuit program for mac windows

#Spice circuit program for mac how to

I will instead concentrate on how to set up and run simulations in KiCad because that material is not as readily available. There are already quite a few tutorials and resources on the internet to help you with creating schematics, including the KiCad Eeschema manual. The focus of this article will be on running circuit simulations within KiCad, not on how to create a schematic.

A basic understanding of electronics is expected along with knowing how to create schematic diagrams in KiCad. This tutorial will teach you how to run a circuit simulation in KiCad.