Added 555 timer duty cycle and freqency in astable mode. (#10456)

* Add files via upload

* Update wheatstone_bridge.py

* Update wheatstone_bridge.py

* Create IC_555_Timer.py

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* Update IC_555_Timer.py

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* Update IC_555_Timer.py

* Update and rename IC_555_Timer.py to ic_555_timer.py

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* Update ic_555_timer.py

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* Update ic_555_timer.py

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* Update ic_555_timer.py

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* Cleanup ic_555_timer.py

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <[email protected]>