Multisim and Ultiboard Idea Exchange

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Multisim simulation

I need to make a circuit that controls the speed of a motor from 0% to 10% using a PWM and that speeds up to full speed in around 10 seconds and slows to 0 in the same time. This is what I've got so far but I'm struggling with the timing. Can anyone help/advise?

Cannot change max value of time axis.

Error Utilboard.

MS LIve LED settings

The default settings for an LED in Multisim Live don't match normal LED characteristics. I appreciate the ability to adjust the parameters for a given exploratory circuit. But the default should be what is most commonly seen in real life, not something that is not likely to exist.
When my students use a physical LED, the knee voltage is always around 1.5V. The takeaway is, that although it is a diode, not every diode has a .7V knee voltage. In Multisim 14 it is easy for them to see this.
When they use Multisim Live, unless they are given specific instructions on the parameters to change, they will come to the conclusion that all diodes use .7V.
It would be much better to set the default for real life and let the engineers adjust it if needed.

Dark mode in Multisim

Graph View - x-axis

Multisim is a very powerful tool and suitable for educational purposes in first courses of Engineering careers. Howevers lacks of a very simple and useful flexibility that other simulators like PSPICE or QUCS have. Is not possible to modify the variable presented in the x-axis of the Graph View!

If you perform a DC Sweep, AC Sweep or Parameter Sweep analysis is very easy to change the variable presented in the y-axis. However, there is not a way to modify the magnitude used for the x-axis. Thus, for example to plot the IV curve of a diode is not straightforward. In a circuit with a battery, resistor and a diode in series the user typically perform a DC sweep of the battery bias and plot the current vs the battery bias. However, is not possible to change the variable plotted in the x-axis to the voltage drop in the diode to visualize the IV (and threshold) of the diode.

Of course one can extract the results to an EXCEL sheet or use the IV analyzer instruments but this is not useful for educational purposes where you want to show the students similarities with the experiment performed in the breadboard of the laboratory.

In more advanced simulations sometimes the user also is interested to visualize some magnitude of the circuit vs different kind of magnitudes (voltaje, current, ...).

Therefore is required to have the possibility to allow the user to modify the variable of the x-axis for more flexibility of the simulations.

Ultra Librarian and SnapEDA support

Utiboard has some windows and fields to create net, buses and component groups in the "Group Editor" tool. The bus groups are required if you want to autoroute a particular bus. However, there's no creation of a bus group when you create a bus in Multisim, so this have to be done manually in Ultiboard, and the back annotate it to Multisim. So I think that is a good idea to have the same "Group Editor" window in Multisim, and also automtically add Buses to Bus Groups. Also, another related enhancement could be the creation of component's "Room Property" (like OrCAD) for components that need to be near in the PCB as passive components for medium to high speed IC's, and use this property to automatically create a component group, and also aid Autorouters to impose particular constraints for this group, like trace length, impedance, and maximum via count. This can increase success and speed of ultiboard Autorouter, or make manual placing and routing much faster.

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Exporting on as .png file is limiting in the sense that you actually have to crop the exported figure to have it fit nicely in a word document. Scaling of the figure also leads to a loss of quality. The grid in the background should also be removed on request.

As Microsoft word is largely used to create documents for students, the possibility to export as metafile would be useful to teachers.

p.s. Word does not fully support svg files but "export as .svg" would still be a nice option.

Sub-circuits

Hi,

I am a lecturer at UNED, the Spanish National Distance Learning University. It is a University offering blended learning, however, the online learning is essential. I am member of a team composed of 3 lecturers, who are teaching Digital Electronics to first years' students in a Computer Science Engineering BSc programme. More than 1300 students are enrolled in our module this year.

Multisim live is a great innitiative, thank you for that. There are some components we are still missing in the live version as for Digital Electronics, but we understand that this is an evolving project that will grow gradually.

Another issue for us is that, among our students, we have an increasing rate of students with disabilities, including people with visual impairments and people with impairments in the mobility of upper limbs. For that reason, multisim live's compliance with WCAG 2.1 is essential for an inclusive university like ours.

We are already working with accessible mathematical expressions, and with tactile diagrams of theoretical concepts.

Any improvements of an outstanding practical tool like Multisim in that direction would be really highly appreciated. Not only by our university, I believe. Attending the needs of disabled students is currently mandatory according to the laws in Spain and in many other countries.

Kind regards,

Alejandro

7 segment display and square wave

In more advanced simulations sometimes the user also is interested to visualize some magnitude of the circuit vs different kind of magnitudes (voltaje, current, ...).

Therefore is required to have the possibility to allow the user to modify the variable of the x-axis for more flexibility of the simulations.

Improving Multisim Memory capability

Hello,

Recently, a Monte Carlo Simulation was run, testing and changing the value of 12 resistors on a simple circuit. But the computer crashed rounding the 8k samples stating the error:

SR-3310283 - Multisim error.png

Changes on the resistors, power sources and simulations options were made but still, the tool was not able to handle at least 20k samples on the same run. The computer used had 40 cores and 64GB of RAM.

It will be a great improvement to the tool if the memory could be increased or even creating a 64-bit application.

Thanks.

In more advanced simulations sometimes the user also is interested to visualize some magnitude of the circuit vs different kind of magnitudes (voltaje, current, ...).

Therefore is required to have the possibility to allow the user to modify the variable of the x-axis for more flexibility of the simulations.

Dark mode in Multisim Live

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Multisim and Ultiboard Idea Exchange

Multisim simulation

Cannot change max value of time axis.

Error Utilboard.

MS LIve LED settings

Dark mode in Multisim

Exporting simulation data to .mat (Matlab Compatible) format

Graph View - x-axis

Ultra Librarian and SnapEDA support

More consistance between Multisim and Ultiboard Regarding Net Groups, Component Groups and Other design properties.

Export/Import Multisim Configuration Files

Add "Export as" for Word to help teachers create documents for students

Sub-circuits

Analog and Digital Circuits Experiments

Accessibility of multisim live for people with disabilities

7 segment display and square wave

Making thick and thin tracks wires in schematic/multisim circuit design

Modify x-axis of the Graph View of Multisim

Improving Multisim Memory capability

x-axis of the Graph View of Multisim

Dark mode in Multisim Live