Tuesday 28 June 2016

transistors - Understanding the slayer exciter circuit base voltage


I am quite new to electronics and I have a bit of trouble understanding part of the slayer exciter circuit.


If we take this schematic from electroboom here:


enter image description here



I don't understand how the secondary would send a negative voltage to Q1. From the flow of current through the primary, it would seem to me like it would actually send positive current; I don't see at what point Q1 is interrupted.


How does the secondary create a negative voltage?




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