modified 21 hours ago

Two-Transistor Astable Multivibrator Dual LED Flasher

00:16:20

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.

published 21 hours ago

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EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.