Question abt making a spefic circuit

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what is the most simple circuit (with batteries as generator) i can make to make a light bulb or diiode keep going on and off?
thank you for help

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darkness_limits said:
what is the most simple circuit (with batteries as generator) i can make to make a light bulb or diiode keep going on and off?
thank you for help

A battery in series with a (LED + Resistor / light bulb) and an on-off button. Arbitrary frequency and duty cycle. As long as your finger lasts, I guess (though it is the simplest!)

...Okay, so the next step up would maybe be a 555 timer in astable oscillator mode (Google for 555 timer, or 555 square wave).

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