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The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation and oscillator applications. The part is still in widespread use, thanks to its low price and ubiquity. The 556 timer is simply two 555 timers in a single package.

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Using high resistance resistor greater than 10M possibly does not work with 555 Timer

I can definitely change the capacitor value but want to know about Resistor limit on these cheap 555 timers. …
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