To get it going you need to press the little button in the top left corner. The first capacitor converts dc to a short pulse, which excites a tank circuit. The output of the tank circuit is then amplified, rectified and fed through a low pass filter. The low pass filter feeds to a comparator with a NOT-gate at its output. The NOT-gate feeds to an OP-amp buffer and then to a capacitor that converts the signal to a short pulse which is then amplified by an OP-amp. This feeds back to two mosfets that work function as an SPDT switch, ultimatelyproducing another short pulse exciting the tank circuit once its peak voltage drops below a certain level, set by the comparator resistor values.
