Light Senstive Siren
- Product SKU: LGZK003
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The Light Senstive Siren Circuit mainly depends on the light-dependent resistor for varying the sound in the circuit. These are also called photoresistors. Generally, light-dependent resistors will have high resistance in darkness and it is decreased when they are illuminated with the light. The photoresistors used here are two megaohm resistors i.e. they have resistance in the range of megaohms in darkness. In the present circuit, two resistors LDR and the 1K ohm resistor are connected in series. These are connected to the capacitor C2 of 100nf. The two pins of the sixth and second are shorted and connected to the same capacitor C2. The other end of the capacitor is connected to the ground.
Speaker is another component that plays a vital role in the circuit. Light Senstive Siren Kits takes the electrical signals and translate them into physical signals. This acts as a transducer. Inside the speaker, there will a permanent magnet and the moving magnet. The electrical signals coming from the 555 timer IC are converted into vibrations using these magnets.
These Light Senstive Siren vibrations are heard at the output. Here the speaker used is a buzzer. This should be connected to the output pin 3of the 555 timer IC through an electrolytic capacitor C1. The positive terminal of the capacitor is connected to Pin 3 of the timer and the negative terminal is connected to the positive terminal of the buzzer. The negative terminal of the buzzer is grounded.
- Dimensions (cm) L x W x H : 15 x 12 x 5
- Weight (gm): 50
Thank you. My son loved it.