Series Zener Diodes Crash Circuit Lab


I'm new to Circuit Lab and love it! Thanks for making it. I've run into a strange issue though.

I had a much more complex circuit but have simplified it to isolate the error. it's just a basic transformerless power supply connected to a rising edge detector.

If I run the simulation with a 24V zener diode, it solves in 3 seconds. if I instead put two 12V zeners in series, it won't simulate and the "time remaining" to simulate just counts UP indefinitely. Is this some kind of crash? How can I get around this?

May 29, 2018

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