This blog is to show you how to make a simple beeping buzzer control circuit. I Have Shown Super Effect LED Buzzer Circuit. It is used in Bicycle or Bike Horn, Aeroplane, Ambulance, Microwave, Fridge and many other things.
Using 555’s Astable Multivibrator, both output states are unstable state and output continuously changes between the two states.
Basically 555 timer IC can be used in 3 modes 1. Monostable Mode 2. Bistable Mode 3. Astable Mode.
In this blog we discussed about how 555 Timer can be used as Buzzer Control using Astable Multivibrator .
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555 Timer Pin Diagram
PIN 1 is Ground Pin, Pin 2 is the Trigger Pin, PIN 3 is Output Pin, Pin 4 represents Reset Pin, Pin 5 is the Control Voltage, PIN 6 is Threshold, PIN 7 is the Discharge PIN and PIN 8 represents Power Supply or Vcc.
555 Timer Internal Architecture
555 Timer is divided into 5 parts. First part is voltage divider circuit, second comparator block, third flip-flop circuit, fourth discharge circuit and last output driver circuit.
Simple Buzzer Circuit Diagram
One LED and a BUZZER is connected to PIN3 of 555 Timer with a resistance of 150 ohm. PIN2 is connected to PIN6 and a capacitor(Here we used 4.7microF) is connected with PIN2 & Ground. PIN6 is also connected to PIN7 with a 10kohm variable resistance. PIN7 is connected to PIN8 with a 10K ohm resistor as PIN8 is the Power Supply or VCC.
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