A simple electronic circuit that mimics the sound of a genuine siren with a rising and falling pitch is a wailing siren circuit that uses a 555 IC. The pulsating sound is produced by using the oscillation of the 555 IC at a certain frequency. Circuit Working: Parts List: Category Description Quantity Wattage Resistors 390Ω, […]
Alarm Circuits
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Simple “Hee Haw” Siren Circuit
This special electronic circuit makes a sound like a siren, but instead of a steady wail, it goes high low high low in a repeating pattern kind of like saying “Hee Haw.” It is like a fun siren sound you might hear on a cartoon! Circuit Working: Parts List: Component Type Description Quantity Resistors(All resistors […]
Simple Fog Horn Circuit
Ever wondered how fog horns make that deep, spooky sound? A fog horn circuit is like a tiny sound machine for fog. It uses electronic parts to create that classic low moaning sound that rises and falls in pitch. These circuits are mostly used for fun DIY projects to make a fog horn sound effect, […]
Simple Light Activated Alarm Circuit
This Light Activated Alarm Circuit is like a super sensitive nightlight. It uses a special light sensor LDR that acts like a tiny eye. If it gets dark suddenly like someone might be sneaking around, the circuit triggers an alarm buzzer, light etc to let you know somethings up. This circuit uses other parts transistors, […]
Simple Freezer Alarm with Buzzer Circuit
This freezer alarm circuit is like a tiny guard for your frozen treats. It uses a special sensor thermistor to keep an eye on the temperature. If the freezer gets too warm, the circuit sounds an alarm buzzer to let you know somethings fishy or melty. This way, you can take action to save your […]
Simple High Temperature Alarm Circuit using IC 555
This circuit uses a special chip IC 555 to act like a temperature watchdog. It constantly checks the temperature, and if it gets too hot, the circuit triggers an alarm usually a buzzer to let you know somethings sizzling. This way, you can catch overheating problems before they become a big issue. Circuit Working: Parts […]