Simple Dc/Ac Inverter Circuit

This dc-to-ac inverter is based on the popular 555. A 555 oscillator circuit drives a buffer amplifier consisting of Ql, Q2, and Q3. The circuit operates at 150 to 160 Hz. Tl can be a 6.3-V or 12.6-V filament transformer as applicable.
Simple Dc/Ac Inverter Circuit - schematic

The frequency can be changed by changing the values of Rl and/or Cl.

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