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555-IC Timed Beeper/Alarm

February 24, 2011 Rend 0

This is a simple circuit of beeper using 555 timer. This circuit can be employed to energize lights, horn, or other signaling device at any […]

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Long Period SCR Timer

February 19, 2011 Rend 0

This is a SCR timer circuit. Here, SCR is used to drive the final actuator, the buzzer.  The time constanst of this circuit is determined […]