## How do I graph/plot DC to AC circuit?

 Hi, I'm a hobbyist, so maybe this is a bone headed question... But, how do I plot the AC frequency in this circuit: https://www.circuitlab.com/circuit/25asw6/555dctoac/ I'm trying to make a variable frequency circuit to drive piezo atomizer. I need to see the AC plot, but so far only get 'non-finite value' error. It could be I just don't know how to connect to the transformer output properly - I don't see piezo elements available, but a speaker or buzzer should behave as one, no? Please send a clue... thanks, -AC by Bigsipper January 02, 2015 CL is complaining about not understanding the value of something in the circuit. The problem here is that you have placed a spurious h in the value of the primary inductance of XFMR1. Change the Lpri of XFMR1 from: 10mh to: 10m then you can run the Time Domain simulation. by signality January 03, 2015 Ahhhh! Thanks! by Bigsipper January 03, 2015