This is a ultra sensitive intruder alarm circuit diagram. Here the shadow of the intruder passing through few meters nearby can trigger this circuit to produce an alarm.Here the job is performed by means of a LDR(Light Dependent Resistor).Thus this…
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Circuit above is used to display counts in 7 segment display.Here we are employing two ICs and 7 segment to perform this action. IC1 NE555, IC2 CD 4033 and a seven segment display LT543. As we know IC 555 is…
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We use lot of short duration timers to alert when a predefined time elapses. This can come in extremely handy for applications such as Cooking, exercise, sports and so on. We use stopwatches, alarms and all sorts of things to…
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Infra Red Jammer Circuit Remote jammer circuit can be used to play pranks with your friends and its basically a fun ciruit to try on. And this circuit is very very easy to build and it will take only ten…
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Police Siren circuit using 555 Timer is the one we are about to see here. This circuit uses two NE 555 ICs and each of them wired as astable multivibrators. And a speaker is used in order to produce the…
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We have seen many alarm circuits but Fire alarm was one of the most important among all. In many buildings,industries and houses fire alarm circuit have been installed in order to alert people them in case of a fire break…
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Burglar alarm circuit or Theft alarm circuits are quite common and different circuits uses different methods to detect intruders. The above circuit uses timer IC 555 to detect and sound alarm upon detecting intruders. The circuit is very easy to…
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