.. 20-turn primary winding and a 12-turn secondary winding, both fabricated from 0.2-mm-diameter, 0.008-in, AWG #32 magnet wire. When transistor Q 1 switches on, it induces a positive voltage in T 1 ’s secondary winding that switches ...
.. resets through R 3 and D 3 . The voltage at T 1 ’s secondary winding goes slightly negative to balance the core's volt-second characteristic, which forward-biases Q 3 ’s body diode without current, and Q 4 ’s body diode ...