Category: 555 Timer Projects

Simple Power Supply Resumption Alarm

Engineeering Projects
simple power resumption alarm

Once again the most popular timer IC NE555 proved that its applications are limited only to the user’s ingenuity. The circuit of the simple power resumption alarm shown here is straightforward, where IC1 is wired in a special kind of mode. Circuit Description of Simple Power Supply Resumption Alarm When the power supply resumes, pin 2 of IC1 is grounded through C1 and pin 3 goes high. This makes reset pin 4 go high for about 10 seconds. When the capacitor C1 charges to two-thirds of the supply voltage, the output…

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Strobe Light Circuit Using 555 Timer IC: A Step-by-Step Guide

Engineeering Projects
stroboscope circuit

Introduction to the Strobe Light Circuit A stroboscope is an electronic device designed to observe rapidly moving objects that exhibit periodic motion as though they are stationary. This effect is achieved by flashing a strobe light at a frequency that synchronizes with the object’s motion, such as the rotation of a wheel, making it appear as if it is not moving. The strobe light circuit using a 555 timer IC utilizes a neon lamp, but for better visibility and illumination, a 9-inch tube light is recommended. PARTS LIST OF STROBE…

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Telephone Ringer Circuit using 555 IC

Engineeering Projects
telephone melody ringer circuit

Telephone ringer circuit using 555 IC is a simple circuit or device which produces an alerting sound whenever a call is placed to your telephone number. The Telephone project  posted here is the a telephone ringer which produces  pleasant  tunes when a call is placed to your number. The tunes produced by “telephone ringer” here are more melodious and  soothing compare to those of old telephone instrument and piezo buzzer in the current electronic telephone instruments. PARTS LIST OF TELEPHONE RINGER CIRCUIT USING 555 IC Resistors (all ¼-watt, ± 5%…

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