Effect of Solenoid Core Position on a 555 Astable Oscillator’s Frequency
Автор: Aaron Dahlen
Загружено: 2025-01-28
Просмотров: 357
Summary:
This video demonstrates a 555-timer circuit that uses a solenoid as the lower timing element. The instructor shows how removing a plunger or pressing a relay armature changes the oscillator frequency.
Content covered in the video:
• Overview of the breadboard circuit using a 555 timer, buzzer, and solenoid.
• Schematic showing the solenoid drawn as a variable inductor in the timing path.
• Oscilloscope measurement of the capacitor node to reveal frequency changes.
• Demonstration of pitch variation when the solenoid plunger is inserted or removed.
• Repeat demonstration using a small relay with a movable armature.
• Explanation challenge inviting viewers to analyze the observed frequency shift.
• Practical tip regarding microphone noise-reduction settings when recording continuous tones.
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