Doorknob touch alarm
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The circuit contains a few basic elements, an flip-flop based oscillator, a set of delays, a flip-flop as a sensor, and the audible alarm.The circuit consists of three parts : oscillator ,sensor and audible driver.
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![]()
The circuit contains a few basic elements, an flip-flop based oscillator, a set of delays, a flip-flop as a sensor, and the audible alarm.The circuit consists of three parts : oscillator ,sensor and audible driver.
| at |
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