The two-transistor astable multivibrator uses cross-coupled electrolytic capacitors and $100\,\text{k}\Omega$ base resistors to alternate switching between two NPN transistors, driving two LEDs to flash continuously via continuous RC charge-discharge cycles. In circuit simulators like EveryCircuit, perfect mathematical symmetry can cause both ideal transistors to turn on simultaneously and lock up with both LEDs lit, requiring a manual simulation reset or a slight component variation to trigger the oscillation that naturally occurs due to real-world hardware tolerances.
