I just downloaded LTSpice and playing around with it, I was trying to build an astable multivibrator circuit and couldn't find a symbol for a speaker. Any ideas?
Also, is there a larger library of symbols and components that can be added on to this library or is it, what you see is what you get?
Just ran into another symbol needed....SPST switch?

 

I just downloaded LTSpice and playing around with it, I was trying to build an astable multivibrator circuit and couldn't find a symbol for a speaker. Any ideas?
Also, is there a larger library of symbols and components that can be added on to this library or is it, what you see is what you get?
Just ran into another symbol needed....SPST switch?

Hi

Best place to find components, symbols, models, help, etc., is at the LTspice group on Yahoo groups.

eT

 

Now the fun begins. If you look long enough you can find almost everything.
I think there are some speaker models posted here:
http://www.electro-tech-online.com/threads/ltspice-model-loudspeaker.142634/unread
There are voltage and current controlled switches included in spice. (csw & sw)
Sometimes help and examples will help you out.

 

On the switch, the Help file is your friend:



Here is an example of how to use it:



Note the use of a pulsed source V2 to specify when the switch is closed and when it is open in the context of a time domain (TRAN) simulation. The default threshold voltage for the switch is 0V, so the switch is closed when V(on) > 0 and off when V(on)<0. I specified explicitly that the On resistance of the switch is 1mΩ. Read the help file entry for a full understanding of how rich the switch model is...

On the loudspeaker, what do you think is an appropriate model? For most simulations, a 4Ω or 8Ω resistor works quite well. Only if you know something about a speaker's motion dynamics and enclosure is a richer model necessary...

 

This circuit is out of a 300 in 1 kit that I use for my students. I am not sure on the ratings for the speaker and the switch used in the diagram is a simple SPST switch. It is a Maxitronix kit.