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![SOLVED]555 timer drops 4 Volts. - General Electronics - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/9/a/8/9a854f181d7e7cb57085651ac50a860b307f6858.jpeg "SOLVED]555 timer drops 4 Volts. - General Electronics - Arduino Forum")
SOLVED]555 timer drops 4 Volts. - General Electronics - Arduino Forum
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555 Oscillator Tutorial - The Astable Multivibrator
