The scenario
Need a 555 timer flyback driver that generates high-voltage pulses for an electric fence charger from a 12 V battery.
What is in this drawing
Read the decisions behind it.
01
Use NE555 astable oscillator to set pulse frequency and duty cycle
02
Drive an NPN power transistor that switches current through a flyback transformer primary
03
Ground one secondary terminal and bring the other to HV output for the fence load
Reusable for battery-powered fence chargers, ignition coils, or other flyback high-voltage pulse generators where the 555 timer sets the switching rate.
More like this