Learn About Multivibrators and Flasher Circuits: A Step-by-Step Explanation

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The discussion focuses on understanding the operation of an astable multivibrator circuit used in flasher circuits. The user seeks clarification on how current flows through the circuit, particularly regarding the charging and discharging of capacitors and the role of transistors. It is noted that the user initially misunderstands the function of resistors in the circuit, believing they are unnecessary. A suggestion is made to consult Wikipedia for a clearer explanation of multivibrators. The conversation emphasizes the importance of grasping the basic principles of astable multivibrators for better comprehension of the circuit's behavior.
mishobg12
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Hi,
please, help me understand this circuit that is drawn here: http://wild-bohemian.com/electronics/flasher.html

I have learned about miltivibrators (which is what I believe this is) in my electronics classes but never really understood them.

I tried understanding it myself - as the current flows trough the path of least resistance, it will flow trough the capacitors first, charging them, and then saturates the transistors, thus unlocking its way to ground trough their collector and emitter and then the capacitors will uncharge, desaturating the transistors and then back to start, but this will keep the leds always on and the bigger resistors going to the bases will not be needed. So, I am wrong.

Please, explain it in simple steps. Thank you :)
 
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Try typing "multivibrator" into Wikipedia. There's an excellent explanation there. What you have is called an "astable" multivibrator.
 
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